--- /dev/null
+/*
+ * cdc-acm.c
+ *
+ * Copyright (c) 1999 Armin Fuerst <fuerst@in.tum.de>
+ * Copyright (c) 1999 Pavel Machek <pavel@suse.cz>
+ * Copyright (c) 1999 Johannes Erdfelt <johannes@erdfelt.com>
+ * Copyright (c) 2000 Vojtech Pavlik <vojtech@suse.cz>
+ * Copyright (c) 2004 Oliver Neukum <oliver@neukum.name>
+ * Copyright (c) 2005 David Kubicek <dave@awk.cz>
+ *
+ * USB Abstract Control Model driver for USB modems and ISDN adapters
+ *
+ * Sponsored by SuSE
+ *
+ * ChangeLog:
+ * v0.9 - thorough cleaning, URBification, almost a rewrite
+ * v0.10 - some more cleanups
+ * v0.11 - fixed flow control, read error doesn't stop reads
+ * v0.12 - added TIOCM ioctls, added break handling, made struct acm kmalloced
+ * v0.13 - added termios, added hangup
+ * v0.14 - sized down struct acm
+ * v0.15 - fixed flow control again - characters could be lost
+ * v0.16 - added code for modems with swapped data and control interfaces
+ * v0.17 - added new style probing
+ * v0.18 - fixed new style probing for devices with more configurations
+ * v0.19 - fixed CLOCAL handling (thanks to Richard Shih-Ping Chan)
+ * v0.20 - switched to probing on interface (rather than device) class
+ * v0.21 - revert to probing on device for devices with multiple configs
+ * v0.22 - probe only the control interface. if usbcore doesn't choose the
+ * config we want, sysadmin changes bConfigurationValue in sysfs.
+ * v0.23 - use softirq for rx processing, as needed by tty layer
+ * v0.24 - change probe method to evaluate CDC union descriptor
+ * v0.25 - downstream tasks paralelized to maximize throughput
+ * v0.26 - multiple write urbs, writesize increased
+ */
+
+/*
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#undef DEBUG
+#undef VERBOSE_DEBUG
+
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/tty.h>
+#include <linux/tty_driver.h>
+#include <linux/tty_flip.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <asm/uaccess.h>
+#include <linux/usb.h>
+#include <linux/usb/cdc.h>
+#include <asm/byteorder.h>
+#include <asm/unaligned.h>
+#include <linux/list.h>
+
+#include "cdc-acm.h"
+
+
+#define ACM_CLOSE_TIMEOUT 15 /* seconds to let writes drain */
+
+/*
+ * Version Information
+ */
+#define DRIVER_VERSION "v0.26"
+#define DRIVER_AUTHOR "Armin Fuerst, Pavel Machek, Johannes Erdfelt, Vojtech Pavlik, David Kubicek"
+#define DRIVER_DESC "USB Abstract Control Model driver for USB modems and ISDN adapters"
+
+static struct usb_driver acm_driver;
+static struct tty_driver *acm_tty_driver;
+static struct acm *acm_table[ACM_TTY_MINORS];
+
+static DEFINE_MUTEX(open_mutex);
+
+#define ACM_READY(acm) (acm && acm->dev && acm->used)
+
+#ifdef VERBOSE_DEBUG
+#define verbose 1
+#else
+#define verbose 0
+#endif
+
+/*
+ * Functions for ACM control messages.
+ */
+
+static int acm_ctrl_msg(struct acm *acm, int request, int value, void *buf, int len)
+{
+ int retval = usb_control_msg(acm->dev, usb_sndctrlpipe(acm->dev, 0),
+ request, USB_RT_ACM, value,
+ acm->control->altsetting[0].desc.bInterfaceNumber,
+ buf, len, 5000);
+ dbg("acm_control_msg: rq: 0x%02x val: %#x len: %#x result: %d", request, value, len, retval);
+ return retval < 0 ? retval : 0;
+}
+
+/* devices aren't required to support these requests.
+ * the cdc acm descriptor tells whether they do...
+ */
+#define acm_set_control(acm, control) \
+ acm_ctrl_msg(acm, USB_CDC_REQ_SET_CONTROL_LINE_STATE, control, NULL, 0)
+#define acm_set_line(acm, line) \
+ acm_ctrl_msg(acm, USB_CDC_REQ_SET_LINE_CODING, 0, line, sizeof *(line))
+#define acm_send_break(acm, ms) \
+ acm_ctrl_msg(acm, USB_CDC_REQ_SEND_BREAK, ms, NULL, 0)
+
+/*
+ * Write buffer management.
+ * All of these assume proper locks taken by the caller.
+ */
+
+static int acm_wb_alloc(struct acm *acm)
+{
+ int i, wbn;
+ struct acm_wb *wb;
+
+ wbn = 0;
+ i = 0;
+ for (;;) {
+ wb = &acm->wb[wbn];
+ if (!wb->use) {
+ wb->use = 1;
+ return wbn;
+ }
+ wbn = (wbn + 1) % ACM_NW;
+ if (++i >= ACM_NW)
+ return -1;
+ }
+}
+
+static int acm_wb_is_avail(struct acm *acm)
+{
+ int i, n;
+ unsigned long flags;
+
+ n = ACM_NW;
+ spin_lock_irqsave(&acm->write_lock, flags);
+ for (i = 0; i < ACM_NW; i++) {
+ n -= acm->wb[i].use;
+ }
+ spin_unlock_irqrestore(&acm->write_lock, flags);
+ return n;
+}
+
+/*
+ * Finish write. Caller must hold acm->write_lock
+ */
+static void acm_write_done(struct acm *acm, struct acm_wb *wb)
+{
+ wb->use = 0;
+ acm->transmitting--;
+}
+
+/*
+ * Poke write.
+ *
+ * the caller is responsible for locking
+ */
+
+static int acm_start_wb(struct acm *acm, struct acm_wb *wb)
+{
+ int rc;
+
+ acm->transmitting++;
+
+ wb->urb->transfer_buffer = wb->buf;
+ wb->urb->transfer_dma = wb->dmah;
+ wb->urb->transfer_buffer_length = wb->len;
+ wb->urb->dev = acm->dev;
+
+ if ((rc = usb_submit_urb(wb->urb, GFP_ATOMIC)) < 0) {
+ dbg("usb_submit_urb(write bulk) failed: %d", rc);
+ acm_write_done(acm, wb);
+ }
+ return rc;
+}
+
+static int acm_write_start(struct acm *acm, int wbn)
+{
+ unsigned long flags;
+ struct acm_wb *wb = &acm->wb[wbn];
+ int rc;
+
+ spin_lock_irqsave(&acm->write_lock, flags);
+ if (!acm->dev) {
+ wb->use = 0;
+ spin_unlock_irqrestore(&acm->write_lock, flags);
+ return -ENODEV;
+ }
+
+ dbg("%s susp_count: %d", __func__, acm->susp_count);
+ if (acm->susp_count) {
+ acm->delayed_wb = wb;
+ schedule_work(&acm->waker);
+ spin_unlock_irqrestore(&acm->write_lock, flags);
+ return 0; /* A white lie */
+ }
+ usb_mark_last_busy(acm->dev);
+
+ rc = acm_start_wb(acm, wb);
+ spin_unlock_irqrestore(&acm->write_lock, flags);
+
+ return rc;
+
+}
+/*
+ * attributes exported through sysfs
+ */
+static ssize_t show_caps
+(struct device *dev, struct device_attribute *attr, char *buf)
+{
+ struct usb_interface *intf = to_usb_interface(dev);
+ struct acm *acm = usb_get_intfdata(intf);
+
+ return sprintf(buf, "%d", acm->ctrl_caps);
+}
+static DEVICE_ATTR(bmCapabilities, S_IRUGO, show_caps, NULL);
+
+static ssize_t show_country_codes
+(struct device *dev, struct device_attribute *attr, char *buf)
+{
+ struct usb_interface *intf = to_usb_interface(dev);
+ struct acm *acm = usb_get_intfdata(intf);
+
+ memcpy(buf, acm->country_codes, acm->country_code_size);
+ return acm->country_code_size;
+}
+
+static DEVICE_ATTR(wCountryCodes, S_IRUGO, show_country_codes, NULL);
+
+static ssize_t show_country_rel_date
+(struct device *dev, struct device_attribute *attr, char *buf)
+{
+ struct usb_interface *intf = to_usb_interface(dev);
+ struct acm *acm = usb_get_intfdata(intf);
+
+ return sprintf(buf, "%d", acm->country_rel_date);
+}
+
+static DEVICE_ATTR(iCountryCodeRelDate, S_IRUGO, show_country_rel_date, NULL);
+/*
+ * Interrupt handlers for various ACM device responses
+ */
+
+/* control interface reports status changes with "interrupt" transfers */
+static void acm_ctrl_irq(struct urb *urb)
+{
+ struct acm *acm = urb->context;
+ struct usb_cdc_notification *dr = urb->transfer_buffer;
+ unsigned char *data;
+ int newctrl;
+ int retval;
+ int status = urb->status;
+
+ switch (status) {
+ case 0:
+ /* success */
+ break;
+ case -ECONNRESET:
+ case -ENOENT:
+ case -ESHUTDOWN:
+ /* this urb is terminated, clean up */
+ dbg("%s - urb shutting down with status: %d", __func__, status);
+ return;
+ default:
+ dbg("%s - nonzero urb status received: %d", __func__, status);
+ goto exit;
+ }
+
+ if (!ACM_READY(acm))
+ goto exit;
+
+ data = (unsigned char *)(dr + 1);
+ switch (dr->bNotificationType) {
+
+ case USB_CDC_NOTIFY_NETWORK_CONNECTION:
+
+ dbg("%s network", dr->wValue ? "connected to" : "disconnected from");
+ break;
+
+ case USB_CDC_NOTIFY_SERIAL_STATE:
+
+ newctrl = get_unaligned_le16(data);
+
+ if (acm->tty && !acm->clocal && (acm->ctrlin & ~newctrl & ACM_CTRL_DCD)) {
+ dbg("calling hangup");
+ tty_hangup(acm->tty);
+ }
+
+ acm->ctrlin = newctrl;
+
+ dbg("input control lines: dcd%c dsr%c break%c ring%c framing%c parity%c overrun%c",
+ acm->ctrlin & ACM_CTRL_DCD ? '+' : '-', acm->ctrlin & ACM_CTRL_DSR ? '+' : '-',
+ acm->ctrlin & ACM_CTRL_BRK ? '+' : '-', acm->ctrlin & ACM_CTRL_RI ? '+' : '-',
+ acm->ctrlin & ACM_CTRL_FRAMING ? '+' : '-', acm->ctrlin & ACM_CTRL_PARITY ? '+' : '-',
+ acm->ctrlin & ACM_CTRL_OVERRUN ? '+' : '-');
+
+ break;
+
+ default:
+ dbg("unknown notification %d received: index %d len %d data0 %d data1 %d",
+ dr->bNotificationType, dr->wIndex,
+ dr->wLength, data[0], data[1]);
+ break;
+ }
+exit:
+ usb_mark_last_busy(acm->dev);
+ retval = usb_submit_urb (urb, GFP_ATOMIC);
+ if (retval)
+ dev_err(&urb->dev->dev, "%s - usb_submit_urb failed with "
+ "result %d", __func__, retval);
+}
+
+/* data interface returns incoming bytes, or we got unthrottled */
+static void acm_read_bulk(struct urb *urb)
+{
+ struct acm_rb *buf;
+ struct acm_ru *rcv = urb->context;
+ struct acm *acm = rcv->instance;
+ int status = urb->status;
+
+ dbg("Entering acm_read_bulk with status %d", status);
+
+ if (!ACM_READY(acm)) {
+ dev_dbg(&acm->data->dev, "Aborting, acm not ready");
+ return;
+ }
+ usb_mark_last_busy(acm->dev);
+
+ if (status)
+ dev_dbg(&acm->data->dev, "bulk rx status %d\n", status);
+
+ buf = rcv->buffer;
+ buf->size = urb->actual_length;
+
+ if (likely(status == 0)) {
+ spin_lock(&acm->read_lock);
+ acm->processing++;
+ list_add_tail(&rcv->list, &acm->spare_read_urbs);
+ list_add_tail(&buf->list, &acm->filled_read_bufs);
+ spin_unlock(&acm->read_lock);
+ } else {
+ /* we drop the buffer due to an error */
+ spin_lock(&acm->read_lock);
+ list_add_tail(&rcv->list, &acm->spare_read_urbs);
+ list_add(&buf->list, &acm->spare_read_bufs);
+ spin_unlock(&acm->read_lock);
+ /* nevertheless the tasklet must be kicked unconditionally
+ so the queue cannot dry up */
+ }
+ if (likely(!acm->susp_count))
+ tasklet_schedule(&acm->urb_task);
+}
+
+static void acm_rx_tasklet(unsigned long _acm)
+{
+ struct acm *acm = (void *)_acm;
+ struct acm_rb *buf;
+ struct tty_struct *tty = acm->tty;
+ struct acm_ru *rcv;
+ unsigned long flags;
+ unsigned char throttled;
+
+ dbg("Entering acm_rx_tasklet");
+
+ if (!ACM_READY(acm))
+ {
+ dbg("acm_rx_tasklet: ACM not ready");
+ return;
+ }
+
+ spin_lock_irqsave(&acm->throttle_lock, flags);
+ throttled = acm->throttle;
+ spin_unlock_irqrestore(&acm->throttle_lock, flags);
+ if (throttled)
+ {
+ dbg("acm_rx_tasklet: throttled");
+ return;
+ }
+
+next_buffer:
+ spin_lock_irqsave(&acm->read_lock, flags);
+ if (list_empty(&acm->filled_read_bufs)) {
+ spin_unlock_irqrestore(&acm->read_lock, flags);
+ goto urbs;
+ }
+ buf = list_entry(acm->filled_read_bufs.next,
+ struct acm_rb, list);
+ list_del(&buf->list);
+ spin_unlock_irqrestore(&acm->read_lock, flags);
+
+ dbg("acm_rx_tasklet: procesing buf 0x%p, size = %d", buf, buf->size);
+
+ tty_buffer_request_room(tty, buf->size);
+ spin_lock_irqsave(&acm->throttle_lock, flags);
+ throttled = acm->throttle;
+ spin_unlock_irqrestore(&acm->throttle_lock, flags);
+ if (!throttled)
+ tty_insert_flip_string(tty, buf->base, buf->size);
+ tty_flip_buffer_push(tty);
+
+ if (throttled) {
+ dbg("Throttling noticed");
+ spin_lock_irqsave(&acm->read_lock, flags);
+ list_add(&buf->list, &acm->filled_read_bufs);
+ spin_unlock_irqrestore(&acm->read_lock, flags);
+ return;
+ }
+
+ spin_lock_irqsave(&acm->read_lock, flags);
+ list_add(&buf->list, &acm->spare_read_bufs);
+ spin_unlock_irqrestore(&acm->read_lock, flags);
+ goto next_buffer;
+
+urbs:
+ while (!list_empty(&acm->spare_read_bufs)) {
+ spin_lock_irqsave(&acm->read_lock, flags);
+ if (list_empty(&acm->spare_read_urbs)) {
+ acm->processing = 0;
+ spin_unlock_irqrestore(&acm->read_lock, flags);
+ return;
+ }
+ rcv = list_entry(acm->spare_read_urbs.next,
+ struct acm_ru, list);
+ list_del(&rcv->list);
+ spin_unlock_irqrestore(&acm->read_lock, flags);
+
+ buf = list_entry(acm->spare_read_bufs.next,
+ struct acm_rb, list);
+ list_del(&buf->list);
+
+ rcv->buffer = buf;
+
+ usb_fill_bulk_urb(rcv->urb, acm->dev,
+ acm->rx_endpoint,
+ buf->base,
+ acm->readsize,
+ acm_read_bulk, rcv);
+ rcv->urb->transfer_dma = buf->dma;
+ rcv->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
+
+ /* This shouldn't kill the driver as unsuccessful URBs are returned to the
+ free-urbs-pool and resubmited ASAP */
+ spin_lock_irqsave(&acm->read_lock, flags);
+ if (acm->susp_count || usb_submit_urb(rcv->urb, GFP_ATOMIC) < 0) {
+ list_add(&buf->list, &acm->spare_read_bufs);
+ list_add(&rcv->list, &acm->spare_read_urbs);
+ acm->processing = 0;
+ spin_unlock_irqrestore(&acm->read_lock, flags);
+ return;
+ } else {
+ spin_unlock_irqrestore(&acm->read_lock, flags);
+ dbg("acm_rx_tasklet: sending urb 0x%p, rcv 0x%p, buf 0x%p", rcv->urb, rcv, buf);
+ }
+ }
+ spin_lock_irqsave(&acm->read_lock, flags);
+ acm->processing = 0;
+ spin_unlock_irqrestore(&acm->read_lock, flags);
+}
+
+/* data interface wrote those outgoing bytes */
+static void acm_write_bulk(struct urb *urb)
+{
+ struct acm_wb *wb = urb->context;
+ struct acm *acm = wb->instance;
+ unsigned long flags;
+
+ if (verbose || urb->status
+ || (urb->actual_length != urb->transfer_buffer_length))
+ dev_dbg(&acm->data->dev, "tx %d/%d bytes -- > %d\n",
+ urb->actual_length,
+ urb->transfer_buffer_length,
+ urb->status);
+
+ spin_lock_irqsave(&acm->write_lock, flags);
+ acm_write_done(acm, wb);
+ spin_unlock_irqrestore(&acm->write_lock, flags);
+ if (ACM_READY(acm))
+ schedule_work(&acm->work);
+ else
+ wake_up_interruptible(&acm->drain_wait);
+}
+
+static void acm_softint(struct work_struct *work)
+{
+ struct acm *acm = container_of(work, struct acm, work);
+
+ dev_vdbg(&acm->data->dev, "tx work\n");
+ if (!ACM_READY(acm))
+ return;
+ tty_wakeup(acm->tty);
+}
+
+static void acm_waker(struct work_struct *waker)
+{
+ struct acm *acm = container_of(waker, struct acm, waker);
+ int rv;
+
+ rv = usb_autopm_get_interface(acm->control);
+ if (rv < 0) {
+ dev_err(&acm->dev->dev, "Autopm failure in %s\n", __func__);
+ return;
+ }
+ if (acm->delayed_wb) {
+ acm_start_wb(acm, acm->delayed_wb);
+ acm->delayed_wb = NULL;
+ }
+ usb_autopm_put_interface(acm->control);
+}
+
+/*
+ * TTY handlers
+ */
+
+static int acm_tty_open(struct tty_struct *tty, struct file *filp)
+{
+ struct acm *acm;
+ int rv = -EINVAL;
+ int i;
+ dbg("Entering acm_tty_open.");
+
+ mutex_lock(&open_mutex);
+
+ acm = acm_table[tty->index];
+ if (!acm || !acm->dev)
+ goto err_out;
+ else
+ rv = 0;
+
+ set_bit(TTY_NO_WRITE_SPLIT, &tty->flags);
+ tty->driver_data = acm;
+ acm->tty = tty;
+
+ /* force low_latency on so that our tty_push actually forces the data through,
+ otherwise it is scheduled, and with high data rates data can get lost. */
+ tty->low_latency = 1;
+
+ if (usb_autopm_get_interface(acm->control) < 0)
+ goto early_bail;
+ else
+ acm->control->needs_remote_wakeup = 1;
+
+ mutex_lock(&acm->mutex);
+ if (acm->used++) {
+ usb_autopm_put_interface(acm->control);
+ goto done;
+ }
+
+
+ acm->ctrlurb->dev = acm->dev;
+ if (usb_submit_urb(acm->ctrlurb, GFP_KERNEL)) {
+ dbg("usb_submit_urb(ctrl irq) failed");
+ goto bail_out;
+ }
+
+ if (0 > acm_set_control(acm, acm->ctrlout = ACM_CTRL_DTR | ACM_CTRL_RTS) &&
+ (acm->ctrl_caps & USB_CDC_CAP_LINE))
+ goto full_bailout;
+ usb_autopm_put_interface(acm->control);
+
+ INIT_LIST_HEAD(&acm->spare_read_urbs);
+ INIT_LIST_HEAD(&acm->spare_read_bufs);
+ INIT_LIST_HEAD(&acm->filled_read_bufs);
+ for (i = 0; i < acm->rx_buflimit; i++) {
+ list_add(&(acm->ru[i].list), &acm->spare_read_urbs);
+ }
+ for (i = 0; i < acm->rx_buflimit; i++) {
+ list_add(&(acm->rb[i].list), &acm->spare_read_bufs);
+ }
+
+ acm->throttle = 0;
+
+ tasklet_schedule(&acm->urb_task);
+
+done:
+ mutex_unlock(&acm->mutex);
+err_out:
+ mutex_unlock(&open_mutex);
+ return rv;
+
+full_bailout:
+ usb_kill_urb(acm->ctrlurb);
+bail_out:
+ usb_autopm_put_interface(acm->control);
+ acm->used--;
+ mutex_unlock(&acm->mutex);
+early_bail:
+ mutex_unlock(&open_mutex);
+ return -EIO;
+}
+
+static void acm_tty_unregister(struct acm *acm)
+{
+ int i,nr;
+
+ nr = acm->rx_buflimit;
+ tty_unregister_device(acm_tty_driver, acm->minor);
+ usb_put_intf(acm->control);
+ acm_table[acm->minor] = NULL;
+ usb_free_urb(acm->ctrlurb);
+ for (i = 0; i < ACM_NW; i++)
+ usb_free_urb(acm->wb[i].urb);
+ for (i = 0; i < nr; i++)
+ usb_free_urb(acm->ru[i].urb);
+ kfree(acm->country_codes);
+ kfree(acm);
+}
+
+static int acm_tty_chars_in_buffer(struct tty_struct *tty);
+
+static void acm_tty_close(struct tty_struct *tty, struct file *filp)
+{
+ struct acm *acm = tty->driver_data;
+ int i,nr;
+
+ if (!acm || !acm->used)
+ return;
+
+ nr = acm->rx_buflimit;
+ mutex_lock(&open_mutex);
+ if (!--acm->used) {
+ if (acm->dev) {
+ usb_autopm_get_interface(acm->control);
+ acm_set_control(acm, acm->ctrlout = 0);
+
+ /* try letting the last writes drain naturally */
+ wait_event_interruptible_timeout(acm->drain_wait,
+ (ACM_NW == acm_wb_is_avail(acm))
+ || !acm->dev,
+ ACM_CLOSE_TIMEOUT * HZ);
+
+ usb_kill_urb(acm->ctrlurb);
+ for (i = 0; i < ACM_NW; i++)
+ usb_kill_urb(acm->wb[i].urb);
+ for (i = 0; i < nr; i++)
+ usb_kill_urb(acm->ru[i].urb);
+ acm->control->needs_remote_wakeup = 0;
+ usb_autopm_put_interface(acm->control);
+ } else
+ acm_tty_unregister(acm);
+ }
+ mutex_unlock(&open_mutex);
+}
+
+static int acm_tty_write(struct tty_struct *tty, const unsigned char *buf, int count)
+{
+ struct acm *acm = tty->driver_data;
+ int stat;
+ unsigned long flags;
+ int wbn;
+ struct acm_wb *wb;
+
+ dbg("Entering acm_tty_write to write %d bytes,", count);
+
+ if (!ACM_READY(acm))
+ return -EINVAL;
+ if (!count)
+ return 0;
+
+ spin_lock_irqsave(&acm->write_lock, flags);
+ if ((wbn = acm_wb_alloc(acm)) < 0) {
+ spin_unlock_irqrestore(&acm->write_lock, flags);
+ return 0;
+ }
+ wb = &acm->wb[wbn];
+
+ count = (count > acm->writesize) ? acm->writesize : count;
+ dbg("Get %d bytes...", count);
+ memcpy(wb->buf, buf, count);
+ wb->len = count;
+ spin_unlock_irqrestore(&acm->write_lock, flags);
+
+ if ((stat = acm_write_start(acm, wbn)) < 0)
+ return stat;
+ return count;
+}
+
+static int acm_tty_write_room(struct tty_struct *tty)
+{
+ struct acm *acm = tty->driver_data;
+ if (!ACM_READY(acm))
+ return -EINVAL;
+ /*
+ * Do not let the line discipline to know that we have a reserve,
+ * or it might get too enthusiastic.
+ */
+ return acm_wb_is_avail(acm) ? acm->writesize : 0;
+}
+
+static int acm_tty_chars_in_buffer(struct tty_struct *tty)
+{
+ struct acm *acm = tty->driver_data;
+ if (!ACM_READY(acm))
+ return -EINVAL;
+ /*
+ * This is inaccurate (overcounts), but it works.
+ */
+ return (ACM_NW - acm_wb_is_avail(acm)) * acm->writesize;
+}
+
+static void acm_tty_throttle(struct tty_struct *tty)
+{
+ struct acm *acm = tty->driver_data;
+ if (!ACM_READY(acm))
+ return;
+ spin_lock_bh(&acm->throttle_lock);
+ acm->throttle = 1;
+ spin_unlock_bh(&acm->throttle_lock);
+}
+
+static void acm_tty_unthrottle(struct tty_struct *tty)
+{
+ struct acm *acm = tty->driver_data;
+ if (!ACM_READY(acm))
+ return;
+ spin_lock_bh(&acm->throttle_lock);
+ acm->throttle = 0;
+ spin_unlock_bh(&acm->throttle_lock);
+ tasklet_schedule(&acm->urb_task);
+}
+
+static int acm_tty_break_ctl(struct tty_struct *tty, int state)
+{
+ struct acm *acm = tty->driver_data;
+ int retval;
+ if (!ACM_READY(acm))
+ return -EINVAL;
+ retval = acm_send_break(acm, state ? 0xffff : 0);
+ if (retval < 0)
+ dbg("send break failed");
+ return retval;
+}
+
+static int acm_tty_tiocmget(struct tty_struct *tty, struct file *file)
+{
+ struct acm *acm = tty->driver_data;
+
+ if (!ACM_READY(acm))
+ return -EINVAL;
+
+ return (acm->ctrlout & ACM_CTRL_DTR ? TIOCM_DTR : 0) |
+ (acm->ctrlout & ACM_CTRL_RTS ? TIOCM_RTS : 0) |
+ (acm->ctrlin & ACM_CTRL_DSR ? TIOCM_DSR : 0) |
+ (acm->ctrlin & ACM_CTRL_RI ? TIOCM_RI : 0) |
+ (acm->ctrlin & ACM_CTRL_DCD ? TIOCM_CD : 0) |
+ TIOCM_CTS;
+}
+
+static int acm_tty_tiocmset(struct tty_struct *tty, struct file *file,
+ unsigned int set, unsigned int clear)
+{
+ struct acm *acm = tty->driver_data;
+ unsigned int newctrl;
+
+ if (!ACM_READY(acm))
+ return -EINVAL;
+
+ newctrl = acm->ctrlout;
+ set = (set & TIOCM_DTR ? ACM_CTRL_DTR : 0) | (set & TIOCM_RTS ? ACM_CTRL_RTS : 0);
+ clear = (clear & TIOCM_DTR ? ACM_CTRL_DTR : 0) | (clear & TIOCM_RTS ? ACM_CTRL_RTS : 0);
+
+ newctrl = (newctrl & ~clear) | set;
+
+ if (acm->ctrlout == newctrl)
+ return 0;
+ return acm_set_control(acm, acm->ctrlout = newctrl);
+}
+
+static int acm_tty_ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg)
+{
+ struct acm *acm = tty->driver_data;
+
+ if (!ACM_READY(acm))
+ return -EINVAL;
+
+ return -ENOIOCTLCMD;
+}
+
+static const __u32 acm_tty_speed[] = {
+ 0, 50, 75, 110, 134, 150, 200, 300, 600,
+ 1200, 1800, 2400, 4800, 9600, 19200, 38400,
+ 57600, 115200, 230400, 460800, 500000, 576000,
+ 921600, 1000000, 1152000, 1500000, 2000000,
+ 2500000, 3000000, 3500000, 4000000
+};
+
+static const __u8 acm_tty_size[] = {
+ 5, 6, 7, 8
+};
+
+static void acm_tty_set_termios(struct tty_struct *tty, struct ktermios *termios_old)
+{
+ struct acm *acm = tty->driver_data;
+ struct ktermios *termios = tty->termios;
+ struct usb_cdc_line_coding newline;
+ int newctrl = acm->ctrlout;
+
+ if (!ACM_READY(acm))
+ return;
+
+ newline.dwDTERate = cpu_to_le32p(acm_tty_speed +
+ (termios->c_cflag & CBAUD & ~CBAUDEX) + (termios->c_cflag & CBAUDEX ? 15 : 0));
+ newline.bCharFormat = termios->c_cflag & CSTOPB ? 2 : 0;
+ newline.bParityType = termios->c_cflag & PARENB ?
+ (termios->c_cflag & PARODD ? 1 : 2) + (termios->c_cflag & CMSPAR ? 2 : 0) : 0;
+ newline.bDataBits = acm_tty_size[(termios->c_cflag & CSIZE) >> 4];
+
+ acm->clocal = ((termios->c_cflag & CLOCAL) != 0);
+
+ if (!newline.dwDTERate) {
+ newline.dwDTERate = acm->line.dwDTERate;
+ newctrl &= ~ACM_CTRL_DTR;
+ } else newctrl |= ACM_CTRL_DTR;
+
+ if (newctrl != acm->ctrlout)
+ acm_set_control(acm, acm->ctrlout = newctrl);
+
+ if (memcmp(&acm->line, &newline, sizeof newline)) {
+ memcpy(&acm->line, &newline, sizeof newline);
+ dbg("set line: %d %d %d %d", le32_to_cpu(newline.dwDTERate),
+ newline.bCharFormat, newline.bParityType,
+ newline.bDataBits);
+ acm_set_line(acm, &acm->line);
+ }
+}
+
+/*
+ * USB probe and disconnect routines.
+ */
+
+/* Little helpers: write/read buffers free */
+static void acm_write_buffers_free(struct acm *acm)
+{
+ int i;
+ struct acm_wb *wb;
+ struct usb_device *usb_dev = interface_to_usbdev(acm->control);
+
+ for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) {
+ usb_buffer_free(usb_dev, acm->writesize, wb->buf, wb->dmah);
+ }
+}
+
+static void acm_read_buffers_free(struct acm *acm)
+{
+ struct usb_device *usb_dev = interface_to_usbdev(acm->control);
+ int i, n = acm->rx_buflimit;
+
+ for (i = 0; i < n; i++)
+ usb_buffer_free(usb_dev, acm->readsize, acm->rb[i].base, acm->rb[i].dma);
+}
+
+/* Little helper: write buffers allocate */
+static int acm_write_buffers_alloc(struct acm *acm)
+{
+ int i;
+ struct acm_wb *wb;
+
+ for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) {
+ wb->buf = usb_buffer_alloc(acm->dev, acm->writesize, GFP_KERNEL,
+ &wb->dmah);
+ if (!wb->buf) {
+ while (i != 0) {
+ --i;
+ --wb;
+ usb_buffer_free(acm->dev, acm->writesize,
+ wb->buf, wb->dmah);
+ }
+ return -ENOMEM;
+ }
+ }
+ return 0;
+}
+
+static int acm_probe (struct usb_interface *intf,
+ const struct usb_device_id *id)
+{
+ struct usb_cdc_union_desc *union_header = NULL;
+ struct usb_cdc_country_functional_desc *cfd = NULL;
+ unsigned char *buffer = intf->altsetting->extra;
+ int buflen = intf->altsetting->extralen;
+ struct usb_interface *control_interface;
+ struct usb_interface *data_interface;
+ struct usb_endpoint_descriptor *epctrl;
+ struct usb_endpoint_descriptor *epread;
+ struct usb_endpoint_descriptor *epwrite;
+ struct usb_device *usb_dev = interface_to_usbdev(intf);
+ struct acm *acm;
+ int minor;
+ int ctrlsize,readsize;
+ u8 *buf;
+ u8 ac_management_function = 0;
+ u8 call_management_function = 0;
+ int call_interface_num = -1;
+ int data_interface_num;
+ unsigned long quirks;
+ int num_rx_buf;
+ int i;
+
+ /* normal quirks */
+ quirks = (unsigned long)id->driver_info;
+ num_rx_buf = (quirks == SINGLE_RX_URB) ? 1 : ACM_NR;
+
+ /* handle quirks deadly to normal probing*/
+ if (quirks == NO_UNION_NORMAL) {
+ data_interface = usb_ifnum_to_if(usb_dev, 1);
+ control_interface = usb_ifnum_to_if(usb_dev, 0);
+ goto skip_normal_probe;
+ }
+
+ /* normal probing*/
+ if (!buffer) {
+ dev_err(&intf->dev, "Weird descriptor references\n");
+ return -EINVAL;
+ }
+
+ if (!buflen) {
+ if (intf->cur_altsetting->endpoint->extralen && intf->cur_altsetting->endpoint->extra) {
+ dev_dbg(&intf->dev,"Seeking extra descriptors on endpoint\n");
+ buflen = intf->cur_altsetting->endpoint->extralen;
+ buffer = intf->cur_altsetting->endpoint->extra;
+ } else {
+ dev_err(&intf->dev,
+ "Zero length descriptor references\n");
+ return -EINVAL;
+ }
+ }
+
+ while (buflen > 0) {
+ if (buffer [1] != USB_DT_CS_INTERFACE) {
+ dev_err(&intf->dev, "skipping garbage\n");
+ goto next_desc;
+ }
+
+ switch (buffer [2]) {
+ case USB_CDC_UNION_TYPE: /* we've found it */
+ if (union_header) {
+ dev_err(&intf->dev, "More than one "
+ "union descriptor, "
+ "skipping ...\n");
+ goto next_desc;
+ }
+ union_header = (struct usb_cdc_union_desc *)
+ buffer;
+ break;
+ case USB_CDC_COUNTRY_TYPE: /* export through sysfs*/
+ cfd = (struct usb_cdc_country_functional_desc *)buffer;
+ break;
+ case USB_CDC_HEADER_TYPE: /* maybe check version */
+ break; /* for now we ignore it */
+ case USB_CDC_ACM_TYPE:
+ ac_management_function = buffer[3];
+ break;
+ case USB_CDC_CALL_MANAGEMENT_TYPE:
+ call_management_function = buffer[3];
+ call_interface_num = buffer[4];
+ if ((call_management_function & 3) != 3)
+ dev_err(&intf->dev, "This device "
+ "cannot do calls on its own. "
+ "It is no modem.\n");
+ break;
+ default:
+ /* there are LOTS more CDC descriptors that
+ * could legitimately be found here.
+ */
+ dev_dbg(&intf->dev, "Ignoring descriptor: "
+ "type %02x, length %d\n",
+ buffer[2], buffer[0]);
+ break;
+ }
+next_desc:
+ buflen -= buffer[0];
+ buffer += buffer[0];
+ }
+
+ if (!union_header) {
+ if (call_interface_num > 0) {
+ dev_dbg(&intf->dev,"No union descriptor, using call management descriptor\n");
+ data_interface = usb_ifnum_to_if(usb_dev, (data_interface_num = call_interface_num));
+ control_interface = intf;
+ } else {
+ dev_dbg(&intf->dev,"No union descriptor, giving up\n");
+ return -ENODEV;
+ }
+ } else {
+ control_interface = usb_ifnum_to_if(usb_dev, union_header->bMasterInterface0);
+ data_interface = usb_ifnum_to_if(usb_dev, (data_interface_num = union_header->bSlaveInterface0));
+ if (!control_interface || !data_interface) {
+ dev_dbg(&intf->dev,"no interfaces\n");
+ return -ENODEV;
+ }
+ }
+
+ if (data_interface_num != call_interface_num)
+ dev_dbg(&intf->dev,"Separate call control interface. That is not fully supported.\n");
+
+skip_normal_probe:
+
+ /*workaround for switched interfaces */
+ if (data_interface->cur_altsetting->desc.bInterfaceClass != CDC_DATA_INTERFACE_TYPE) {
+ if (control_interface->cur_altsetting->desc.bInterfaceClass == CDC_DATA_INTERFACE_TYPE) {
+ struct usb_interface *t;
+ dev_dbg(&intf->dev,"Your device has switched interfaces.\n");
+
+ t = control_interface;
+ control_interface = data_interface;
+ data_interface = t;
+ } else {
+ return -EINVAL;
+ }
+ }
+
+ /* Accept probe requests only for the control interface */
+ if (intf != control_interface)
+ return -ENODEV;
+
+ if (usb_interface_claimed(data_interface)) { /* valid in this context */
+ dev_dbg(&intf->dev,"The data interface isn't available\n");
+ return -EBUSY;
+ }
+
+
+ if (data_interface->cur_altsetting->desc.bNumEndpoints < 2)
+ return -EINVAL;
+
+ epctrl = &control_interface->cur_altsetting->endpoint[0].desc;
+ epread = &data_interface->cur_altsetting->endpoint[0].desc;
+ epwrite = &data_interface->cur_altsetting->endpoint[1].desc;
+
+
+ /* workaround for switched endpoints */
+ if (!usb_endpoint_dir_in(epread)) {
+ /* descriptors are swapped */
+ struct usb_endpoint_descriptor *t;
+ dev_dbg(&intf->dev,"The data interface has switched endpoints\n");
+
+ t = epread;
+ epread = epwrite;
+ epwrite = t;
+ }
+ dbg("interfaces are valid");
+ for (minor = 0; minor < ACM_TTY_MINORS && acm_table[minor]; minor++);
+
+ if (minor == ACM_TTY_MINORS) {
+ dev_err(&intf->dev, "no more free acm devices\n");
+ return -ENODEV;
+ }
+
+ if (!(acm = kzalloc(sizeof(struct acm), GFP_KERNEL))) {
+ dev_dbg(&intf->dev, "out of memory (acm kzalloc)\n");
+ goto alloc_fail;
+ }
+
+ ctrlsize = le16_to_cpu(epctrl->wMaxPacketSize);
+ readsize = le16_to_cpu(epread->wMaxPacketSize)* ( quirks == SINGLE_RX_URB ? 1 : 2);
+ acm->writesize = le16_to_cpu(epwrite->wMaxPacketSize) * 20;
+ acm->control = control_interface;
+ acm->data = data_interface;
+ acm->minor = minor;
+ acm->dev = usb_dev;
+ acm->ctrl_caps = ac_management_function;
+ acm->ctrlsize = ctrlsize;
+ acm->readsize = readsize;
+ acm->rx_buflimit = num_rx_buf;
+ acm->urb_task.func = acm_rx_tasklet;
+ acm->urb_task.data = (unsigned long) acm;
+ INIT_WORK(&acm->work, acm_softint);
+ INIT_WORK(&acm->waker, acm_waker);
+ init_waitqueue_head(&acm->drain_wait);
+ spin_lock_init(&acm->throttle_lock);
+ spin_lock_init(&acm->write_lock);
+ spin_lock_init(&acm->read_lock);
+ mutex_init(&acm->mutex);
+ acm->rx_endpoint = usb_rcvbulkpipe(usb_dev, epread->bEndpointAddress);
+
+ buf = usb_buffer_alloc(usb_dev, ctrlsize, GFP_KERNEL, &acm->ctrl_dma);
+ if (!buf) {
+ dev_dbg(&intf->dev, "out of memory (ctrl buffer alloc)\n");
+ goto alloc_fail2;
+ }
+ acm->ctrl_buffer = buf;
+
+ if (acm_write_buffers_alloc(acm) < 0) {
+ dev_dbg(&intf->dev, "out of memory (write buffer alloc)\n");
+ goto alloc_fail4;
+ }
+
+ acm->ctrlurb = usb_alloc_urb(0, GFP_KERNEL);
+ if (!acm->ctrlurb) {
+ dev_dbg(&intf->dev, "out of memory (ctrlurb kmalloc)\n");
+ goto alloc_fail5;
+ }
+ for (i = 0; i < num_rx_buf; i++) {
+ struct acm_ru *rcv = &(acm->ru[i]);
+
+ if (!(rcv->urb = usb_alloc_urb(0, GFP_KERNEL))) {
+ dev_dbg(&intf->dev, "out of memory (read urbs usb_alloc_urb)\n");
+ goto alloc_fail7;
+ }
+
+ rcv->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
+ rcv->instance = acm;
+ }
+ for (i = 0; i < num_rx_buf; i++) {
+ struct acm_rb *rb = &(acm->rb[i]);
+
+ rb->base = usb_buffer_alloc(acm->dev, readsize,
+ GFP_KERNEL, &rb->dma);
+ if (!rb->base) {
+ dev_dbg(&intf->dev, "out of memory (read bufs usb_buffer_alloc)\n");
+ goto alloc_fail7;
+ }
+ }
+ for(i = 0; i < ACM_NW; i++)
+ {
+ struct acm_wb *snd = &(acm->wb[i]);
+
+ if (!(snd->urb = usb_alloc_urb(0, GFP_KERNEL))) {
+ dev_dbg(&intf->dev, "out of memory (write urbs usb_alloc_urb)");
+ goto alloc_fail7;
+ }
+
+ usb_fill_bulk_urb(snd->urb, usb_dev, usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress),
+ NULL, acm->writesize, acm_write_bulk, snd);
+ snd->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
+ snd->instance = acm;
+ }
+
+ usb_set_intfdata (intf, acm);
+
+ i = device_create_file(&intf->dev, &dev_attr_bmCapabilities);
+ if (i < 0)
+ goto alloc_fail8;
+
+ if (cfd) { /* export the country data */
+ acm->country_codes = kmalloc(cfd->bLength - 4, GFP_KERNEL);
+ if (!acm->country_codes)
+ goto skip_countries;
+ acm->country_code_size = cfd->bLength - 4;
+ memcpy(acm->country_codes, (u8 *)&cfd->wCountyCode0, cfd->bLength - 4);
+ acm->country_rel_date = cfd->iCountryCodeRelDate;
+
+ i = device_create_file(&intf->dev, &dev_attr_wCountryCodes);
+ if (i < 0) {
+ kfree(acm->country_codes);
+ goto skip_countries;
+ }
+
+ i = device_create_file(&intf->dev, &dev_attr_iCountryCodeRelDate);
+ if (i < 0) {
+ kfree(acm->country_codes);
+ goto skip_countries;
+ }
+ }
+
+skip_countries:
+ usb_fill_int_urb(acm->ctrlurb, usb_dev, usb_rcvintpipe(usb_dev, epctrl->bEndpointAddress),
+ acm->ctrl_buffer, ctrlsize, acm_ctrl_irq, acm, epctrl->bInterval);
+ acm->ctrlurb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
+ acm->ctrlurb->transfer_dma = acm->ctrl_dma;
+
+ dev_info(&intf->dev, "ttyACM%d: USB ACM device\n", minor);
+
+ acm_set_control(acm, acm->ctrlout);
+
+ acm->line.dwDTERate = cpu_to_le32(9600);
+ acm->line.bDataBits = 8;
+ acm_set_line(acm, &acm->line);
+
+ usb_driver_claim_interface(&acm_driver, data_interface, acm);
+ usb_set_intfdata(data_interface, acm);
+
+ usb_get_intf(control_interface);
+ tty_register_device(acm_tty_driver, minor, &control_interface->dev);
+
+ acm_table[minor] = acm;
+
+ return 0;
+alloc_fail8:
+ for (i = 0; i < ACM_NW; i++)
+ usb_free_urb(acm->wb[i].urb);
+alloc_fail7:
+ acm_read_buffers_free(acm);
+ for (i = 0; i < num_rx_buf; i++)
+ usb_free_urb(acm->ru[i].urb);
+ usb_free_urb(acm->ctrlurb);
+alloc_fail5:
+ acm_write_buffers_free(acm);
+alloc_fail4:
+ usb_buffer_free(usb_dev, ctrlsize, acm->ctrl_buffer, acm->ctrl_dma);
+alloc_fail2:
+ kfree(acm);
+alloc_fail:
+ return -ENOMEM;
+}
+
+static void stop_data_traffic(struct acm *acm)
+{
+ int i;
+ dbg("Entering stop_data_traffic");
+
+ tasklet_disable(&acm->urb_task);
+
+ usb_kill_urb(acm->ctrlurb);
+ for(i = 0; i < ACM_NW; i++)
+ usb_kill_urb(acm->wb[i].urb);
+ for (i = 0; i < acm->rx_buflimit; i++)
+ usb_kill_urb(acm->ru[i].urb);
+
+ tasklet_enable(&acm->urb_task);
+
+ cancel_work_sync(&acm->work);
+ cancel_work_sync(&acm->waker);
+}
+
+static void acm_disconnect(struct usb_interface *intf)
+{
+ struct acm *acm = usb_get_intfdata(intf);
+ struct usb_device *usb_dev = interface_to_usbdev(intf);
+
+ /* sibling interface is already cleaning up */
+ if (!acm)
+ return;
+
+ mutex_lock(&open_mutex);
+ if (acm->country_codes){
+ device_remove_file(&acm->control->dev,
+ &dev_attr_wCountryCodes);
+ device_remove_file(&acm->control->dev,
+ &dev_attr_iCountryCodeRelDate);
+ }
+ device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities);
+ acm->dev = NULL;
+ usb_set_intfdata(acm->control, NULL);
+ usb_set_intfdata(acm->data, NULL);
+
+ stop_data_traffic(acm);
+
+ acm_write_buffers_free(acm);
+ usb_buffer_free(usb_dev, acm->ctrlsize, acm->ctrl_buffer, acm->ctrl_dma);
+ acm_read_buffers_free(acm);
+
+ usb_driver_release_interface(&acm_driver, intf == acm->control ?
+ acm->data : acm->control);
+
+ if (!acm->used) {
+ acm_tty_unregister(acm);
+ mutex_unlock(&open_mutex);
+ return;
+ }
+
+ mutex_unlock(&open_mutex);
+
+ if (acm->tty)
+ tty_hangup(acm->tty);
+}
+
+#ifdef CONFIG_PM
+static int acm_suspend(struct usb_interface *intf, pm_message_t message)
+{
+ struct acm *acm = usb_get_intfdata(intf);
+ int cnt;
+
+ if (acm->dev->auto_pm) {
+ int b;
+
+ spin_lock_irq(&acm->read_lock);
+ spin_lock(&acm->write_lock);
+ b = acm->processing + acm->transmitting;
+ spin_unlock(&acm->write_lock);
+ spin_unlock_irq(&acm->read_lock);
+ if (b)
+ return -EBUSY;
+ }
+
+ spin_lock_irq(&acm->read_lock);
+ spin_lock(&acm->write_lock);
+ cnt = acm->susp_count++;
+ spin_unlock(&acm->write_lock);
+ spin_unlock_irq(&acm->read_lock);
+
+ if (cnt)
+ return 0;
+ /*
+ we treat opened interfaces differently,
+ we must guard against open
+ */
+ mutex_lock(&acm->mutex);
+
+ if (acm->used)
+ stop_data_traffic(acm);
+
+ mutex_unlock(&acm->mutex);
+ return 0;
+}
+
+static int acm_resume(struct usb_interface *intf)
+{
+ struct acm *acm = usb_get_intfdata(intf);
+ int rv = 0;
+ int cnt;
+
+ spin_lock_irq(&acm->read_lock);
+ acm->susp_count -= 1;
+ cnt = acm->susp_count;
+ spin_unlock_irq(&acm->read_lock);
+
+ if (cnt)
+ return 0;
+
+ mutex_lock(&acm->mutex);
+ if (acm->used) {
+ rv = usb_submit_urb(acm->ctrlurb, GFP_NOIO);
+ if (rv < 0)
+ goto err_out;
+
+ tasklet_schedule(&acm->urb_task);
+ }
+
+err_out:
+ mutex_unlock(&acm->mutex);
+ return rv;
+}
+
+#endif /* CONFIG_PM */
+/*
+ * USB driver structure.
+ */
+
+static struct usb_device_id acm_ids[] = {
+ /* quirky and broken devices */
+ { USB_DEVICE(0x0870, 0x0001), /* Metricom GS Modem */
+ .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
+ },
+ { USB_DEVICE(0x0e8d, 0x0003), /* FIREFLY, MediaTek Inc; andrey.arapov@gmail.com */
+ .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
+ },
+ { USB_DEVICE(0x0482, 0x0203), /* KYOCERA AH-K3001V */
+ .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
+ },
+ { USB_DEVICE(0x079b, 0x000f), /* BT On-Air USB MODEM */
+ .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
+ },
+ { USB_DEVICE(0x0ace, 0x1608), /* ZyDAS 56K USB MODEM */
+ .driver_info = SINGLE_RX_URB, /* firmware bug */
+ },
+ { USB_DEVICE(0x0ace, 0x1611), /* ZyDAS 56K USB MODEM - new version */
+ .driver_info = SINGLE_RX_URB, /* firmware bug */
+ },
+ { USB_DEVICE(0x22b8, 0x7000), /* Motorola Q Phone */
+ .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
+ },
+ { USB_DEVICE(0x0803, 0x3095), /* Zoom Telephonics Model 3095F USB MODEM */
+ .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
+ },
+ { USB_DEVICE(0x0572, 0x1321), /* Conexant USB MODEM CX93010 */
+ .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
+ },
+ { USB_DEVICE(0x22b8, 0x6425), /* Motorola MOTOMAGX phones */
+ },
+
+ /* control interfaces with various AT-command sets */
+ { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
+ USB_CDC_ACM_PROTO_AT_V25TER) },
+ { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
+ USB_CDC_ACM_PROTO_AT_PCCA101) },
+ { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
+ USB_CDC_ACM_PROTO_AT_PCCA101_WAKE) },
+ { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
+ USB_CDC_ACM_PROTO_AT_GSM) },
+ { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
+ USB_CDC_ACM_PROTO_AT_3G ) },
+ { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
+ USB_CDC_ACM_PROTO_AT_CDMA) },
+
+ /* NOTE: COMM/ACM/0xff is likely MSFT RNDIS ... NOT a modem!! */
+ { }
+};
+
+MODULE_DEVICE_TABLE (usb, acm_ids);
+
+static struct usb_driver acm_driver = {
+ .name = "cdc_acm",
+ .probe = acm_probe,
+ .disconnect = acm_disconnect,
+#ifdef CONFIG_PM
+ .suspend = acm_suspend,
+ .resume = acm_resume,
+#endif
+ .id_table = acm_ids,
+#ifdef CONFIG_PM
+ .supports_autosuspend = 1,
+#endif
+};
+
+/*
+ * TTY driver structures.
+ */
+
+static const struct tty_operations acm_ops = {
+ .open = acm_tty_open,
+ .close = acm_tty_close,
+ .write = acm_tty_write,
+ .write_room = acm_tty_write_room,
+ .ioctl = acm_tty_ioctl,
+ .throttle = acm_tty_throttle,
+ .unthrottle = acm_tty_unthrottle,
+ .chars_in_buffer = acm_tty_chars_in_buffer,
+ .break_ctl = acm_tty_break_ctl,
+ .set_termios = acm_tty_set_termios,
+ .tiocmget = acm_tty_tiocmget,
+ .tiocmset = acm_tty_tiocmset,
+};
+
+/*
+ * Init / exit.
+ */
+
+static int __init acm_init(void)
+{
+ int retval;
+ acm_tty_driver = alloc_tty_driver(ACM_TTY_MINORS);
+ if (!acm_tty_driver)
+ return -ENOMEM;
+ acm_tty_driver->owner = THIS_MODULE,
+ acm_tty_driver->driver_name = "acm",
+ acm_tty_driver->name = "ttyACM",
+ acm_tty_driver->major = ACM_TTY_MAJOR,
+ acm_tty_driver->minor_start = 0,
+ acm_tty_driver->type = TTY_DRIVER_TYPE_SERIAL,
+ acm_tty_driver->subtype = SERIAL_TYPE_NORMAL,
+ acm_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
+ acm_tty_driver->init_termios = tty_std_termios;
+ acm_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL;
+ tty_set_operations(acm_tty_driver, &acm_ops);
+
+ retval = tty_register_driver(acm_tty_driver);
+ if (retval) {
+ put_tty_driver(acm_tty_driver);
+ return retval;
+ }
+
+ retval = usb_register(&acm_driver);
+ if (retval) {
+ tty_unregister_driver(acm_tty_driver);
+ put_tty_driver(acm_tty_driver);
+ return retval;
+ }
+
+ printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
+ DRIVER_DESC "\n");
+
+ return 0;
+}
+
+static void __exit acm_exit(void)
+{
+ usb_deregister(&acm_driver);
+ tty_unregister_driver(acm_tty_driver);
+ put_tty_driver(acm_tty_driver);
+}
+
+module_init(acm_init);
+module_exit(acm_exit);
+
+MODULE_AUTHOR( DRIVER_AUTHOR );
+MODULE_DESCRIPTION( DRIVER_DESC );
+MODULE_LICENSE("GPL");
+
projects / kernel-power / blobdiff