| // SPDX-License-Identifier: GPL-2.0+ |
| /* |
| * cdc-acm.c |
| * |
| * Copyright (c) 1999 Armin Fuerst <fuerst@in.tum.de> |
| * Copyright (c) 1999 Pavel Machek <pavel@ucw.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> |
| * Copyright (c) 2011 Johan Hovold <jhovold@gmail.com> |
| * |
| * USB Abstract Control Model driver for USB modems and ISDN adapters |
| * |
| * Sponsored by SuSE |
| */ |
| |
| #undef DEBUG |
| #undef VERBOSE_DEBUG |
| |
| #include <linux/kernel.h> |
| #include <linux/sched/signal.h> |
| #include <linux/errno.h> |
| #include <linux/init.h> |
| #include <linux/slab.h> |
| #include <linux/log2.h> |
| #include <linux/tty.h> |
| #include <linux/serial.h> |
| #include <linux/tty_driver.h> |
| #include <linux/tty_flip.h> |
| #include <linux/module.h> |
| #include <linux/mutex.h> |
| #include <linux/uaccess.h> |
| #include <linux/usb.h> |
| #include <linux/usb/cdc.h> |
| #include <asm/byteorder.h> |
| #include <asm/unaligned.h> |
| #include <linux/idr.h> |
| #include <linux/list.h> |
| |
| #include "cdc-acm.h" |
| |
| |
| #define DRIVER_AUTHOR "Armin Fuerst, Pavel Machek, Johannes Erdfelt, Vojtech Pavlik, David Kubicek, Johan Hovold" |
| #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 DEFINE_IDR(acm_minors); |
| static DEFINE_MUTEX(acm_minors_lock); |
| |
| static void acm_tty_set_termios(struct tty_struct *tty, |
| struct ktermios *termios_old); |
| |
| /* |
| * acm_minors accessors |
| */ |
| |
| /* |
| * Look up an ACM structure by minor. If found and not disconnected, increment |
| * its refcount and return it with its mutex held. |
| */ |
| static struct acm *acm_get_by_minor(unsigned int minor) |
| { |
| struct acm *acm; |
| |
| mutex_lock(&acm_minors_lock); |
| acm = idr_find(&acm_minors, minor); |
| if (acm) { |
| mutex_lock(&acm->mutex); |
| if (acm->disconnected) { |
| mutex_unlock(&acm->mutex); |
| acm = NULL; |
| } else { |
| tty_port_get(&acm->port); |
| mutex_unlock(&acm->mutex); |
| } |
| } |
| mutex_unlock(&acm_minors_lock); |
| return acm; |
| } |
| |
| /* |
| * Try to find an available minor number and if found, associate it with 'acm'. |
| */ |
| static int acm_alloc_minor(struct acm *acm) |
| { |
| int minor; |
| |
| mutex_lock(&acm_minors_lock); |
| minor = idr_alloc(&acm_minors, acm, 0, ACM_TTY_MINORS, GFP_KERNEL); |
| mutex_unlock(&acm_minors_lock); |
| |
| return minor; |
| } |
| |
| /* Release the minor number associated with 'acm'. */ |
| static void acm_release_minor(struct acm *acm) |
| { |
| mutex_lock(&acm_minors_lock); |
| idr_remove(&acm_minors, acm->minor); |
| mutex_unlock(&acm_minors_lock); |
| } |
| |
| /* |
| * Functions for ACM control messages. |
| */ |
| |
| static int acm_ctrl_msg(struct acm *acm, int request, int value, |
| void *buf, int len) |
| { |
| int retval; |
| |
| retval = usb_autopm_get_interface(acm->control); |
| if (retval) |
| return retval; |
| |
| 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); |
| |
| dev_dbg(&acm->control->dev, |
| "%s - rq 0x%02x, val %#x, len %#x, result %d\n", |
| __func__, request, value, len, retval); |
| |
| usb_autopm_put_interface(acm->control); |
| |
| return retval < 0 ? retval : 0; |
| } |
| |
| /* devices aren't required to support these requests. |
| * the cdc acm descriptor tells whether they do... |
| */ |
| static inline int acm_set_control(struct acm *acm, int control) |
| { |
| if (acm->quirks & QUIRK_CONTROL_LINE_STATE) |
| return -EOPNOTSUPP; |
| |
| return 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) |
| |
| static void acm_kill_urbs(struct acm *acm) |
| { |
| int i; |
| |
| 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->read_urbs[i]); |
| } |
| |
| /* |
| * 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; |
| wb->len = 0; |
| 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--; |
| usb_autopm_put_interface_async(acm->control); |
| } |
| |
| /* |
| * 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; |
| |
| rc = usb_submit_urb(wb->urb, GFP_ATOMIC); |
| if (rc < 0) { |
| dev_err(&acm->data->dev, |
| "%s - usb_submit_urb(write bulk) failed: %d\n", |
| __func__, rc); |
| acm_write_done(acm, wb); |
| } |
| return rc; |
| } |
| |
| /* |
| * attributes exported through sysfs |
| */ |
| static ssize_t bmCapabilities_show |
| (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_RO(bmCapabilities); |
| |
| static ssize_t wCountryCodes_show |
| (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_RO(wCountryCodes); |
| |
| static ssize_t iCountryCodeRelDate_show |
| (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_RO(iCountryCodeRelDate); |
| /* |
| * Interrupt handlers for various ACM device responses |
| */ |
| |
| static void acm_process_notification(struct acm *acm, unsigned char *buf) |
| { |
| int newctrl; |
| int difference; |
| unsigned long flags; |
| struct usb_cdc_notification *dr = (struct usb_cdc_notification *)buf; |
| unsigned char *data = buf + sizeof(struct usb_cdc_notification); |
| |
| switch (dr->bNotificationType) { |
| case USB_CDC_NOTIFY_NETWORK_CONNECTION: |
| dev_dbg(&acm->control->dev, |
| "%s - network connection: %d\n", __func__, dr->wValue); |
| break; |
| |
| case USB_CDC_NOTIFY_SERIAL_STATE: |
| if (le16_to_cpu(dr->wLength) != 2) { |
| dev_dbg(&acm->control->dev, |
| "%s - malformed serial state\n", __func__); |
| break; |
| } |
| |
| newctrl = get_unaligned_le16(data); |
| dev_dbg(&acm->control->dev, |
| "%s - serial state: 0x%x\n", __func__, newctrl); |
| |
| if (!acm->clocal && (acm->ctrlin & ~newctrl & ACM_CTRL_DCD)) { |
| dev_dbg(&acm->control->dev, |
| "%s - calling hangup\n", __func__); |
| tty_port_tty_hangup(&acm->port, false); |
| } |
| |
| difference = acm->ctrlin ^ newctrl; |
| spin_lock_irqsave(&acm->read_lock, flags); |
| acm->ctrlin = newctrl; |
| acm->oldcount = acm->iocount; |
| |
| if (difference & ACM_CTRL_DSR) |
| acm->iocount.dsr++; |
| if (difference & ACM_CTRL_DCD) |
| acm->iocount.dcd++; |
| if (newctrl & ACM_CTRL_BRK) |
| acm->iocount.brk++; |
| if (newctrl & ACM_CTRL_RI) |
| acm->iocount.rng++; |
| if (newctrl & ACM_CTRL_FRAMING) |
| acm->iocount.frame++; |
| if (newctrl & ACM_CTRL_PARITY) |
| acm->iocount.parity++; |
| if (newctrl & ACM_CTRL_OVERRUN) |
| acm->iocount.overrun++; |
| spin_unlock_irqrestore(&acm->read_lock, flags); |
| |
| if (difference) |
| wake_up_all(&acm->wioctl); |
| |
| break; |
| |
| default: |
| dev_dbg(&acm->control->dev, |
| "%s - unknown notification %d received: index %d len %d\n", |
| __func__, |
| dr->bNotificationType, dr->wIndex, dr->wLength); |
| } |
| } |
| |
| /* 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 int current_size = urb->actual_length; |
| unsigned int expected_size, copy_size, alloc_size; |
| int retval; |
| int status = urb->status; |
| |
| switch (status) { |
| case 0: |
| /* success */ |
| break; |
| case -ECONNRESET: |
| case -ENOENT: |
| case -ESHUTDOWN: |
| /* this urb is terminated, clean up */ |
| dev_dbg(&acm->control->dev, |
| "%s - urb shutting down with status: %d\n", |
| __func__, status); |
| return; |
| default: |
| dev_dbg(&acm->control->dev, |
| "%s - nonzero urb status received: %d\n", |
| __func__, status); |
| goto exit; |
| } |
| |
| usb_mark_last_busy(acm->dev); |
| |
| if (acm->nb_index) |
| dr = (struct usb_cdc_notification *)acm->notification_buffer; |
| |
| /* size = notification-header + (optional) data */ |
| expected_size = sizeof(struct usb_cdc_notification) + |
| le16_to_cpu(dr->wLength); |
| |
| if (current_size < expected_size) { |
| /* notification is transmitted fragmented, reassemble */ |
| if (acm->nb_size < expected_size) { |
| u8 *new_buffer; |
| alloc_size = roundup_pow_of_two(expected_size); |
| /* Final freeing is done on disconnect. */ |
| new_buffer = krealloc(acm->notification_buffer, |
| alloc_size, GFP_ATOMIC); |
| if (!new_buffer) { |
| acm->nb_index = 0; |
| goto exit; |
| } |
| |
| acm->notification_buffer = new_buffer; |
| acm->nb_size = alloc_size; |
| dr = (struct usb_cdc_notification *)acm->notification_buffer; |
| } |
| |
| copy_size = min(current_size, |
| expected_size - acm->nb_index); |
| |
| memcpy(&acm->notification_buffer[acm->nb_index], |
| urb->transfer_buffer, copy_size); |
| acm->nb_index += copy_size; |
| current_size = acm->nb_index; |
| } |
| |
| if (current_size >= expected_size) { |
| /* notification complete */ |
| acm_process_notification(acm, (unsigned char *)dr); |
| acm->nb_index = 0; |
| } |
| |
| exit: |
| retval = usb_submit_urb(urb, GFP_ATOMIC); |
| if (retval && retval != -EPERM && retval != -ENODEV) |
| dev_err(&acm->control->dev, |
| "%s - usb_submit_urb failed: %d\n", __func__, retval); |
| else |
| dev_vdbg(&acm->control->dev, |
| "control resubmission terminated %d\n", retval); |
| } |
| |
| static int acm_submit_read_urb(struct acm *acm, int index, gfp_t mem_flags) |
| { |
| int res; |
| |
| if (!test_and_clear_bit(index, &acm->read_urbs_free)) |
| return 0; |
| |
| res = usb_submit_urb(acm->read_urbs[index], mem_flags); |
| if (res) { |
| if (res != -EPERM && res != -ENODEV) { |
| dev_err(&acm->data->dev, |
| "urb %d failed submission with %d\n", |
| index, res); |
| } else { |
| dev_vdbg(&acm->data->dev, "intended failure %d\n", res); |
| } |
| set_bit(index, &acm->read_urbs_free); |
| return res; |
| } else { |
| dev_vdbg(&acm->data->dev, "submitted urb %d\n", index); |
| } |
| |
| return 0; |
| } |
| |
| static int acm_submit_read_urbs(struct acm *acm, gfp_t mem_flags) |
| { |
| int res; |
| int i; |
| |
| for (i = 0; i < acm->rx_buflimit; ++i) { |
| res = acm_submit_read_urb(acm, i, mem_flags); |
| if (res) |
| return res; |
| } |
| |
| return 0; |
| } |
| |
| static void acm_process_read_urb(struct acm *acm, struct urb *urb) |
| { |
| if (!urb->actual_length) |
| return; |
| |
| tty_insert_flip_string(&acm->port, urb->transfer_buffer, |
| urb->actual_length); |
| tty_flip_buffer_push(&acm->port); |
| } |
| |
| static void acm_read_bulk_callback(struct urb *urb) |
| { |
| struct acm_rb *rb = urb->context; |
| struct acm *acm = rb->instance; |
| int status = urb->status; |
| bool stopped = false; |
| bool stalled = false; |
| bool cooldown = false; |
| |
| dev_vdbg(&acm->data->dev, "got urb %d, len %d, status %d\n", |
| rb->index, urb->actual_length, status); |
| |
| if (!acm->dev) { |
| dev_dbg(&acm->data->dev, "%s - disconnected\n", __func__); |
| return; |
| } |
| |
| switch (status) { |
| case 0: |
| usb_mark_last_busy(acm->dev); |
| acm_process_read_urb(acm, urb); |
| break; |
| case -EPIPE: |
| set_bit(EVENT_RX_STALL, &acm->flags); |
| stalled = true; |
| break; |
| case -ENOENT: |
| case -ECONNRESET: |
| case -ESHUTDOWN: |
| dev_dbg(&acm->data->dev, |
| "%s - urb shutting down with status: %d\n", |
| __func__, status); |
| stopped = true; |
| break; |
| case -EOVERFLOW: |
| case -EPROTO: |
| dev_dbg(&acm->data->dev, |
| "%s - cooling babbling device\n", __func__); |
| usb_mark_last_busy(acm->dev); |
| set_bit(rb->index, &acm->urbs_in_error_delay); |
| cooldown = true; |
| break; |
| default: |
| dev_dbg(&acm->data->dev, |
| "%s - nonzero urb status received: %d\n", |
| __func__, status); |
| break; |
| } |
| |
| /* |
| * Make sure URB processing is done before marking as free to avoid |
| * racing with unthrottle() on another CPU. Matches the barriers |
| * implied by the test_and_clear_bit() in acm_submit_read_urb(). |
| */ |
| smp_mb__before_atomic(); |
| set_bit(rb->index, &acm->read_urbs_free); |
| /* |
| * Make sure URB is marked as free before checking the throttled flag |
| * to avoid racing with unthrottle() on another CPU. Matches the |
| * smp_mb() in unthrottle(). |
| */ |
| smp_mb__after_atomic(); |
| |
| if (stopped || stalled || cooldown) { |
| if (stalled) |
| schedule_work(&acm->work); |
| else if (cooldown) |
| schedule_delayed_work(&acm->dwork, HZ / 2); |
| return; |
| } |
| |
| if (test_bit(ACM_THROTTLED, &acm->flags)) |
| return; |
| |
| acm_submit_read_urb(acm, rb->index, GFP_ATOMIC); |
| } |
| |
| /* 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; |
| int status = urb->status; |
| |
| if (status || (urb->actual_length != urb->transfer_buffer_length)) |
| dev_vdbg(&acm->data->dev, "wrote len %d/%d, status %d\n", |
| urb->actual_length, |
| urb->transfer_buffer_length, |
| status); |
| |
| spin_lock_irqsave(&acm->write_lock, flags); |
| acm_write_done(acm, wb); |
| spin_unlock_irqrestore(&acm->write_lock, flags); |
| set_bit(EVENT_TTY_WAKEUP, &acm->flags); |
| schedule_work(&acm->work); |
| } |
| |
| static void acm_softint(struct work_struct *work) |
| { |
| int i; |
| struct acm *acm = container_of(work, struct acm, work); |
| |
| if (test_bit(EVENT_RX_STALL, &acm->flags)) { |
| smp_mb(); /* against acm_suspend() */ |
| if (!acm->susp_count) { |
| for (i = 0; i < acm->rx_buflimit; i++) |
| usb_kill_urb(acm->read_urbs[i]); |
| usb_clear_halt(acm->dev, acm->in); |
| acm_submit_read_urbs(acm, GFP_KERNEL); |
| clear_bit(EVENT_RX_STALL, &acm->flags); |
| } |
| } |
| |
| if (test_and_clear_bit(ACM_ERROR_DELAY, &acm->flags)) { |
| for (i = 0; i < acm->rx_buflimit; i++) |
| if (test_and_clear_bit(i, &acm->urbs_in_error_delay)) |
| acm_submit_read_urb(acm, i, GFP_NOIO); |
| } |
| |
| if (test_and_clear_bit(EVENT_TTY_WAKEUP, &acm->flags)) |
| tty_port_tty_wakeup(&acm->port); |
| } |
| |
| /* |
| * TTY handlers |
| */ |
| |
| static int acm_tty_install(struct tty_driver *driver, struct tty_struct *tty) |
| { |
| struct acm *acm; |
| int retval; |
| |
| acm = acm_get_by_minor(tty->index); |
| if (!acm) |
| return -ENODEV; |
| |
| retval = tty_standard_install(driver, tty); |
| if (retval) |
| goto error_init_termios; |
| |
| /* |
| * Suppress initial echoing for some devices which might send data |
| * immediately after acm driver has been installed. |
| */ |
| if (acm->quirks & DISABLE_ECHO) |
| tty->termios.c_lflag &= ~ECHO; |
| |
| tty->driver_data = acm; |
| |
| return 0; |
| |
| error_init_termios: |
| tty_port_put(&acm->port); |
| return retval; |
| } |
| |
| static int acm_tty_open(struct tty_struct *tty, struct file *filp) |
| { |
| struct acm *acm = tty->driver_data; |
| |
| return tty_port_open(&acm->port, tty, filp); |
| } |
| |
| static void acm_port_dtr_rts(struct tty_port *port, int raise) |
| { |
| struct acm *acm = container_of(port, struct acm, port); |
| int val; |
| int res; |
| |
| if (raise) |
| val = ACM_CTRL_DTR | ACM_CTRL_RTS; |
| else |
| val = 0; |
| |
| /* FIXME: add missing ctrlout locking throughout driver */ |
| acm->ctrlout = val; |
| |
| res = acm_set_control(acm, val); |
| if (res && (acm->ctrl_caps & USB_CDC_CAP_LINE)) |
| dev_err(&acm->control->dev, "failed to set dtr/rts\n"); |
| } |
| |
| static int acm_port_activate(struct tty_port *port, struct tty_struct *tty) |
| { |
| struct acm *acm = container_of(port, struct acm, port); |
| int retval = -ENODEV; |
| int i; |
| |
| mutex_lock(&acm->mutex); |
| if (acm->disconnected) |
| goto disconnected; |
| |
| retval = usb_autopm_get_interface(acm->control); |
| if (retval) |
| goto error_get_interface; |
| |
| /* |
| * FIXME: Why do we need this? Allocating 64K of physically contiguous |
| * memory is really nasty... |
| */ |
| set_bit(TTY_NO_WRITE_SPLIT, &tty->flags); |
| acm->control->needs_remote_wakeup = 1; |
| |
| acm->ctrlurb->dev = acm->dev; |
| retval = usb_submit_urb(acm->ctrlurb, GFP_KERNEL); |
| if (retval) { |
| dev_err(&acm->control->dev, |
| "%s - usb_submit_urb(ctrl irq) failed\n", __func__); |
| goto error_submit_urb; |
| } |
| |
| acm_tty_set_termios(tty, NULL); |
| |
| /* |
| * Unthrottle device in case the TTY was closed while throttled. |
| */ |
| clear_bit(ACM_THROTTLED, &acm->flags); |
| |
| retval = acm_submit_read_urbs(acm, GFP_KERNEL); |
| if (retval) |
| goto error_submit_read_urbs; |
| |
| usb_autopm_put_interface(acm->control); |
| |
| mutex_unlock(&acm->mutex); |
| |
| return 0; |
| |
| error_submit_read_urbs: |
| for (i = 0; i < acm->rx_buflimit; i++) |
| usb_kill_urb(acm->read_urbs[i]); |
| usb_kill_urb(acm->ctrlurb); |
| error_submit_urb: |
| usb_autopm_put_interface(acm->control); |
| error_get_interface: |
| disconnected: |
| mutex_unlock(&acm->mutex); |
| |
| return usb_translate_errors(retval); |
| } |
| |
| static void acm_port_destruct(struct tty_port *port) |
| { |
| struct acm *acm = container_of(port, struct acm, port); |
| |
| acm_release_minor(acm); |
| usb_put_intf(acm->control); |
| kfree(acm->country_codes); |
| kfree(acm); |
| } |
| |
| static void acm_port_shutdown(struct tty_port *port) |
| { |
| struct acm *acm = container_of(port, struct acm, port); |
| struct urb *urb; |
| struct acm_wb *wb; |
| |
| /* |
| * Need to grab write_lock to prevent race with resume, but no need to |
| * hold it due to the tty-port initialised flag. |
| */ |
| spin_lock_irq(&acm->write_lock); |
| spin_unlock_irq(&acm->write_lock); |
| |
| usb_autopm_get_interface_no_resume(acm->control); |
| acm->control->needs_remote_wakeup = 0; |
| usb_autopm_put_interface(acm->control); |
| |
| for (;;) { |
| urb = usb_get_from_anchor(&acm->delayed); |
| if (!urb) |
| break; |
| wb = urb->context; |
| wb->use = 0; |
| usb_autopm_put_interface_async(acm->control); |
| } |
| |
| acm_kill_urbs(acm); |
| } |
| |
| static void acm_tty_cleanup(struct tty_struct *tty) |
| { |
| struct acm *acm = tty->driver_data; |
| |
| tty_port_put(&acm->port); |
| } |
| |
| static void acm_tty_hangup(struct tty_struct *tty) |
| { |
| struct acm *acm = tty->driver_data; |
| |
| tty_port_hangup(&acm->port); |
| } |
| |
| static void acm_tty_close(struct tty_struct *tty, struct file *filp) |
| { |
| struct acm *acm = tty->driver_data; |
| |
| tty_port_close(&acm->port, tty, filp); |
| } |
| |
| 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; |
| |
| if (!count) |
| return 0; |
| |
| dev_vdbg(&acm->data->dev, "%d bytes from tty layer\n", count); |
| |
| spin_lock_irqsave(&acm->write_lock, flags); |
| wbn = acm_wb_alloc(acm); |
| if (wbn < 0) { |
| spin_unlock_irqrestore(&acm->write_lock, flags); |
| return 0; |
| } |
| wb = &acm->wb[wbn]; |
| |
| if (!acm->dev) { |
| wb->use = 0; |
| spin_unlock_irqrestore(&acm->write_lock, flags); |
| return -ENODEV; |
| } |
| |
| count = (count > acm->writesize) ? acm->writesize : count; |
| dev_vdbg(&acm->data->dev, "writing %d bytes\n", count); |
| memcpy(wb->buf, buf, count); |
| wb->len = count; |
| |
| stat = usb_autopm_get_interface_async(acm->control); |
| if (stat) { |
| wb->use = 0; |
| spin_unlock_irqrestore(&acm->write_lock, flags); |
| return stat; |
| } |
| |
| if (acm->susp_count) { |
| usb_anchor_urb(wb->urb, &acm->delayed); |
| spin_unlock_irqrestore(&acm->write_lock, flags); |
| return count; |
| } |
| |
| stat = acm_start_wb(acm, wb); |
| spin_unlock_irqrestore(&acm->write_lock, flags); |
| |
| if (stat < 0) |
| return stat; |
| return count; |
| } |
| |
| static int acm_tty_write_room(struct tty_struct *tty) |
| { |
| struct acm *acm = tty->driver_data; |
| /* |
| * 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 the device was unplugged then any remaining characters fell out |
| * of the connector ;) |
| */ |
| if (acm->disconnected) |
| return 0; |
| /* |
| * 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; |
| |
| set_bit(ACM_THROTTLED, &acm->flags); |
| } |
| |
| static void acm_tty_unthrottle(struct tty_struct *tty) |
| { |
| struct acm *acm = tty->driver_data; |
| |
| clear_bit(ACM_THROTTLED, &acm->flags); |
| |
| /* Matches the smp_mb__after_atomic() in acm_read_bulk_callback(). */ |
| smp_mb(); |
| |
| acm_submit_read_urbs(acm, GFP_KERNEL); |
| } |
| |
| static int acm_tty_break_ctl(struct tty_struct *tty, int state) |
| { |
| struct acm *acm = tty->driver_data; |
| int retval; |
| |
| retval = acm_send_break(acm, state ? 0xffff : 0); |
| if (retval < 0) |
| dev_dbg(&acm->control->dev, |
| "%s - send break failed\n", __func__); |
| return retval; |
| } |
| |
| static int acm_tty_tiocmget(struct tty_struct *tty) |
| { |
| struct acm *acm = tty->driver_data; |
| |
| 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, |
| unsigned int set, unsigned int clear) |
| { |
| struct acm *acm = tty->driver_data; |
| unsigned int newctrl; |
| |
| 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 get_serial_info(struct tty_struct *tty, struct serial_struct *ss) |
| { |
| struct acm *acm = tty->driver_data; |
| |
| ss->xmit_fifo_size = acm->writesize; |
| ss->baud_base = le32_to_cpu(acm->line.dwDTERate); |
| ss->close_delay = jiffies_to_msecs(acm->port.close_delay) / 10; |
| ss->closing_wait = acm->port.closing_wait == ASYNC_CLOSING_WAIT_NONE ? |
| ASYNC_CLOSING_WAIT_NONE : |
| jiffies_to_msecs(acm->port.closing_wait) / 10; |
| return 0; |
| } |
| |
| static int set_serial_info(struct tty_struct *tty, struct serial_struct *ss) |
| { |
| struct acm *acm = tty->driver_data; |
| unsigned int closing_wait, close_delay; |
| unsigned int old_closing_wait, old_close_delay; |
| int retval = 0; |
| |
| close_delay = msecs_to_jiffies(ss->close_delay * 10); |
| closing_wait = ss->closing_wait == ASYNC_CLOSING_WAIT_NONE ? |
| ASYNC_CLOSING_WAIT_NONE : |
| msecs_to_jiffies(ss->closing_wait * 10); |
| |
| /* we must redo the rounding here, so that the values match */ |
| old_close_delay = jiffies_to_msecs(acm->port.close_delay) / 10; |
| old_closing_wait = acm->port.closing_wait == ASYNC_CLOSING_WAIT_NONE ? |
| ASYNC_CLOSING_WAIT_NONE : |
| jiffies_to_msecs(acm->port.closing_wait) / 10; |
| |
| mutex_lock(&acm->port.mutex); |
| |
| if (!capable(CAP_SYS_ADMIN)) { |
| if ((ss->close_delay != old_close_delay) || |
| (ss->closing_wait != old_closing_wait)) |
| retval = -EPERM; |
| else |
| retval = -EOPNOTSUPP; |
| } else { |
| acm->port.close_delay = close_delay; |
| acm->port.closing_wait = closing_wait; |
| } |
| |
| mutex_unlock(&acm->port.mutex); |
| return retval; |
| } |
| |
| static int wait_serial_change(struct acm *acm, unsigned long arg) |
| { |
| int rv = 0; |
| DECLARE_WAITQUEUE(wait, current); |
| struct async_icount old, new; |
| |
| do { |
| spin_lock_irq(&acm->read_lock); |
| old = acm->oldcount; |
| new = acm->iocount; |
| acm->oldcount = new; |
| spin_unlock_irq(&acm->read_lock); |
| |
| if ((arg & TIOCM_DSR) && |
| old.dsr != new.dsr) |
| break; |
| if ((arg & TIOCM_CD) && |
| old.dcd != new.dcd) |
| break; |
| if ((arg & TIOCM_RI) && |
| old.rng != new.rng) |
| break; |
| |
| add_wait_queue(&acm->wioctl, &wait); |
| set_current_state(TASK_INTERRUPTIBLE); |
| schedule(); |
| remove_wait_queue(&acm->wioctl, &wait); |
| if (acm->disconnected) { |
| if (arg & TIOCM_CD) |
| break; |
| else |
| rv = -ENODEV; |
| } else { |
| if (signal_pending(current)) |
| rv = -ERESTARTSYS; |
| } |
| } while (!rv); |
| |
| |
| |
| return rv; |
| } |
| |
| static int acm_tty_get_icount(struct tty_struct *tty, |
| struct serial_icounter_struct *icount) |
| { |
| struct acm *acm = tty->driver_data; |
| |
| icount->dsr = acm->iocount.dsr; |
| icount->rng = acm->iocount.rng; |
| icount->dcd = acm->iocount.dcd; |
| icount->frame = acm->iocount.frame; |
| icount->overrun = acm->iocount.overrun; |
| icount->parity = acm->iocount.parity; |
| icount->brk = acm->iocount.brk; |
| |
| return 0; |
| } |
| |
| static int acm_tty_ioctl(struct tty_struct *tty, |
| unsigned int cmd, unsigned long arg) |
| { |
| struct acm *acm = tty->driver_data; |
| int rv = -ENOIOCTLCMD; |
| |
| switch (cmd) { |
| case TIOCMIWAIT: |
| rv = usb_autopm_get_interface(acm->control); |
| if (rv < 0) { |
| rv = -EIO; |
| break; |
| } |
| rv = wait_serial_change(acm, arg); |
| usb_autopm_put_interface(acm->control); |
| break; |
| } |
| |
| return rv; |
| } |
| |
| 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; |
| |
| newline.dwDTERate = cpu_to_le32(tty_get_baud_rate(tty)); |
| 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; |
| switch (termios->c_cflag & CSIZE) { |
| case CS5: |
| newline.bDataBits = 5; |
| break; |
| case CS6: |
| newline.bDataBits = 6; |
| break; |
| case CS7: |
| newline.bDataBits = 7; |
| break; |
| case CS8: |
| default: |
| newline.bDataBits = 8; |
| break; |
| } |
| /* FIXME: Needs to clear unsupported bits in the termios */ |
| acm->clocal = ((termios->c_cflag & CLOCAL) != 0); |
| |
| if (C_BAUD(tty) == B0) { |
| newline.dwDTERate = acm->line.dwDTERate; |
| newctrl &= ~ACM_CTRL_DTR; |
| } else if (termios_old && (termios_old->c_cflag & CBAUD) == B0) { |
| 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); |
| dev_dbg(&acm->control->dev, "%s - set line: %d %d %d %d\n", |
| __func__, |
| le32_to_cpu(newline.dwDTERate), |
| newline.bCharFormat, newline.bParityType, |
| newline.bDataBits); |
| acm_set_line(acm, &acm->line); |
| } |
| } |
| |
| static const struct tty_port_operations acm_port_ops = { |
| .dtr_rts = acm_port_dtr_rts, |
| .shutdown = acm_port_shutdown, |
| .activate = acm_port_activate, |
| .destruct = acm_port_destruct, |
| }; |
| |
| /* |
| * 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; |
| |
| for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) |
| usb_free_coherent(acm->dev, acm->writesize, wb->buf, wb->dmah); |
| } |
| |
| static void acm_read_buffers_free(struct acm *acm) |
| { |
| int i; |
| |
| for (i = 0; i < acm->rx_buflimit; i++) |
| usb_free_coherent(acm->dev, acm->readsize, |
| acm->read_buffers[i].base, acm->read_buffers[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_alloc_coherent(acm->dev, acm->writesize, GFP_KERNEL, |
| &wb->dmah); |
| if (!wb->buf) { |
| while (i != 0) { |
| --i; |
| --wb; |
| usb_free_coherent(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_call_mgmt_descriptor *cmgmd = 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 = NULL; |
| struct usb_endpoint_descriptor *epread = NULL; |
| struct usb_endpoint_descriptor *epwrite = NULL; |
| struct usb_device *usb_dev = interface_to_usbdev(intf); |
| struct usb_cdc_parsed_header h; |
| struct acm *acm; |
| int minor; |
| int ctrlsize, readsize; |
| u8 *buf; |
| int call_intf_num = -1; |
| int data_intf_num = -1; |
| unsigned long quirks; |
| int num_rx_buf; |
| int i; |
| int combined_interfaces = 0; |
| struct device *tty_dev; |
| int rv = -ENOMEM; |
| int res; |
| |
| /* normal quirks */ |
| quirks = (unsigned long)id->driver_info; |
| |
| if (quirks == IGNORE_DEVICE) |
| return -ENODEV; |
| |
| memset(&h, 0x00, sizeof(struct usb_cdc_parsed_header)); |
| |
| 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); |
| /* we would crash */ |
| if (!data_interface || !control_interface) |
| return -ENODEV; |
| goto skip_normal_probe; |
| } |
| |
| /* normal probing*/ |
| if (!buffer) { |
| dev_err(&intf->dev, "Weird descriptor references\n"); |
| return -EINVAL; |
| } |
| |
| if (!intf->cur_altsetting) |
| return -EINVAL; |
| |
| if (!buflen) { |
| if (intf->cur_altsetting->endpoint && |
| 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; |
| } |
| } |
| |
| cdc_parse_cdc_header(&h, intf, buffer, buflen); |
| union_header = h.usb_cdc_union_desc; |
| cmgmd = h.usb_cdc_call_mgmt_descriptor; |
| if (cmgmd) |
| call_intf_num = cmgmd->bDataInterface; |
| |
| if (!union_header) { |
| if (call_intf_num > 0) { |
| dev_dbg(&intf->dev, "No union descriptor, using call management descriptor\n"); |
| /* quirks for Droids MuIn LCD */ |
| if (quirks & NO_DATA_INTERFACE) { |
| data_interface = usb_ifnum_to_if(usb_dev, 0); |
| } else { |
| data_intf_num = call_intf_num; |
| data_interface = usb_ifnum_to_if(usb_dev, data_intf_num); |
| } |
| control_interface = intf; |
| } else { |
| if (intf->cur_altsetting->desc.bNumEndpoints != 3) { |
| dev_dbg(&intf->dev,"No union descriptor, giving up\n"); |
| return -ENODEV; |
| } else { |
| dev_warn(&intf->dev,"No union descriptor, testing for castrated device\n"); |
| combined_interfaces = 1; |
| control_interface = data_interface = intf; |
| goto look_for_collapsed_interface; |
| } |
| } |
| } else { |
| data_intf_num = union_header->bSlaveInterface0; |
| control_interface = usb_ifnum_to_if(usb_dev, union_header->bMasterInterface0); |
| data_interface = usb_ifnum_to_if(usb_dev, data_intf_num); |
| } |
| |
| if (!control_interface || !data_interface) { |
| dev_dbg(&intf->dev, "no interfaces\n"); |
| return -ENODEV; |
| } |
| if (!data_interface->cur_altsetting || !control_interface->cur_altsetting) |
| return -ENODEV; |
| |
| if (data_intf_num != call_intf_num) |
| dev_dbg(&intf->dev, "Separate call control interface. That is not fully supported.\n"); |
| |
| if (control_interface == data_interface) { |
| /* some broken devices designed for windows work this way */ |
| dev_warn(&intf->dev,"Control and data interfaces are not separated!\n"); |
| combined_interfaces = 1; |
| /* a popular other OS doesn't use it */ |
| quirks |= NO_CAP_LINE; |
| if (data_interface->cur_altsetting->desc.bNumEndpoints != 3) { |
| dev_err(&intf->dev, "This needs exactly 3 endpoints\n"); |
| return -EINVAL; |
| } |
| look_for_collapsed_interface: |
| res = usb_find_common_endpoints(data_interface->cur_altsetting, |
| &epread, &epwrite, &epctrl, NULL); |
| if (res) |
| return res; |
| |
| goto made_compressed_probe; |
| } |
| |
| 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) { |
| dev_dbg(&intf->dev, |
| "Your device has switched interfaces.\n"); |
| swap(control_interface, data_interface); |
| } else { |
| return -EINVAL; |
| } |
| } |
| |
| /* Accept probe requests only for the control interface */ |
| if (!combined_interfaces && intf != control_interface) |
| return -ENODEV; |
| |
| if (!combined_interfaces && 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 || |
| control_interface->cur_altsetting->desc.bNumEndpoints == 0) |
| 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 */ |
| dev_dbg(&intf->dev, |
| "The data interface has switched endpoints\n"); |
| swap(epread, epwrite); |
| } |
| made_compressed_probe: |
| dev_dbg(&intf->dev, "interfaces are valid\n"); |
| |
| acm = kzalloc(sizeof(struct acm), GFP_KERNEL); |
| if (acm == NULL) |
| goto alloc_fail; |
| |
| tty_port_init(&acm->port); |
| acm->port.ops = &acm_port_ops; |
| |
| ctrlsize = usb_endpoint_maxp(epctrl); |
| readsize = usb_endpoint_maxp(epread) * |
| (quirks == SINGLE_RX_URB ? 1 : 2); |
| acm->combined_interfaces = combined_interfaces; |
| acm->writesize = usb_endpoint_maxp(epwrite) * 20; |
| acm->control = control_interface; |
| acm->data = data_interface; |
| |
| usb_get_intf(acm->control); /* undone in destruct() */ |
| |
| minor = acm_alloc_minor(acm); |
| if (minor < 0) |
| goto alloc_fail1; |
| |
| acm->minor = minor; |
| acm->dev = usb_dev; |
| if (h.usb_cdc_acm_descriptor) |
| acm->ctrl_caps = h.usb_cdc_acm_descriptor->bmCapabilities; |
| if (quirks & NO_CAP_LINE) |
| acm->ctrl_caps &= ~USB_CDC_CAP_LINE; |
| acm->ctrlsize = ctrlsize; |
| acm->readsize = readsize; |
| acm->rx_buflimit = num_rx_buf; |
| INIT_WORK(&acm->work, acm_softint); |
| INIT_DELAYED_WORK(&acm->dwork, acm_softint); |
| init_waitqueue_head(&acm->wioctl); |
| spin_lock_init(&acm->write_lock); |
| spin_lock_init(&acm->read_lock); |
| mutex_init(&acm->mutex); |
| if (usb_endpoint_xfer_int(epread)) { |
| acm->bInterval = epread->bInterval; |
| acm->in = usb_rcvintpipe(usb_dev, epread->bEndpointAddress); |
| } else { |
| acm->in = usb_rcvbulkpipe(usb_dev, epread->bEndpointAddress); |
| } |
| if (usb_endpoint_xfer_int(epwrite)) |
| acm->out = usb_sndintpipe(usb_dev, epwrite->bEndpointAddress); |
| else |
| acm->out = usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress); |
| init_usb_anchor(&acm->delayed); |
| acm->quirks = quirks; |
| |
| buf = usb_alloc_coherent(usb_dev, ctrlsize, GFP_KERNEL, &acm->ctrl_dma); |
| if (!buf) |
| goto alloc_fail1; |
| acm->ctrl_buffer = buf; |
| |
| if (acm_write_buffers_alloc(acm) < 0) |
| goto alloc_fail2; |
| |
| acm->ctrlurb = usb_alloc_urb(0, GFP_KERNEL); |
| if (!acm->ctrlurb) |
| goto alloc_fail3; |
| |
| for (i = 0; i < num_rx_buf; i++) { |
| struct acm_rb *rb = &(acm->read_buffers[i]); |
| struct urb *urb; |
| |
| rb->base = usb_alloc_coherent(acm->dev, readsize, GFP_KERNEL, |
| &rb->dma); |
| if (!rb->base) |
| goto alloc_fail4; |
| rb->index = i; |
| rb->instance = acm; |
| |
| urb = usb_alloc_urb(0, GFP_KERNEL); |
| if (!urb) |
| goto alloc_fail4; |
| |
| urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; |
| urb->transfer_dma = rb->dma; |
| if (usb_endpoint_xfer_int(epread)) |
| usb_fill_int_urb(urb, acm->dev, acm->in, rb->base, |
| acm->readsize, |
| acm_read_bulk_callback, rb, |
| acm->bInterval); |
| else |
| usb_fill_bulk_urb(urb, acm->dev, acm->in, rb->base, |
| acm->readsize, |
| acm_read_bulk_callback, rb); |
| |
| acm->read_urbs[i] = urb; |
| __set_bit(i, &acm->read_urbs_free); |
| } |
| for (i = 0; i < ACM_NW; i++) { |
| struct acm_wb *snd = &(acm->wb[i]); |
| |
| snd->urb = usb_alloc_urb(0, GFP_KERNEL); |
| if (snd->urb == NULL) |
| goto alloc_fail5; |
| |
| if (usb_endpoint_xfer_int(epwrite)) |
| usb_fill_int_urb(snd->urb, usb_dev, acm->out, |
| NULL, acm->writesize, acm_write_bulk, snd, epwrite->bInterval); |
| else |
| usb_fill_bulk_urb(snd->urb, usb_dev, acm->out, |
| NULL, acm->writesize, acm_write_bulk, snd); |
| snd->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; |
| if (quirks & SEND_ZERO_PACKET) |
| snd->urb->transfer_flags |= URB_ZERO_PACKET; |
| snd->instance = acm; |
| } |
| |
| usb_set_intfdata(intf, acm); |
| |
| i = device_create_file(&intf->dev, &dev_attr_bmCapabilities); |
| if (i < 0) |
| goto alloc_fail5; |
| |
| if (h.usb_cdc_country_functional_desc) { /* export the country data */ |
| struct usb_cdc_country_functional_desc * cfd = |
| h.usb_cdc_country_functional_desc; |
| |
| 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); |
| acm->country_codes = NULL; |
| acm->country_code_size = 0; |
| goto skip_countries; |
| } |
| |
| i = device_create_file(&intf->dev, |
| &dev_attr_iCountryCodeRelDate); |
| if (i < 0) { |
| device_remove_file(&intf->dev, &dev_attr_wCountryCodes); |
| kfree(acm->country_codes); |
| acm->country_codes = NULL; |
| acm->country_code_size = 0; |
| 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, |
| /* works around buggy devices */ |
| epctrl->bInterval ? epctrl->bInterval : 16); |
| acm->ctrlurb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; |
| acm->ctrlurb->transfer_dma = acm->ctrl_dma; |
| acm->notification_buffer = NULL; |
| acm->nb_index = 0; |
| acm->nb_size = 0; |
| |
| dev_info(&intf->dev, "ttyACM%d: USB ACM device\n", minor); |
| |
| 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); |
| |
| tty_dev = tty_port_register_device(&acm->port, acm_tty_driver, minor, |
| &control_interface->dev); |
| if (IS_ERR(tty_dev)) { |
| rv = PTR_ERR(tty_dev); |
| goto alloc_fail6; |
| } |
| |
| if (quirks & CLEAR_HALT_CONDITIONS) { |
| usb_clear_halt(usb_dev, acm->in); |
| usb_clear_halt(usb_dev, acm->out); |
| } |
| |
| return 0; |
| alloc_fail6: |
| if (acm->country_codes) { |
| device_remove_file(&acm->control->dev, |
| &dev_attr_wCountryCodes); |
| device_remove_file(&acm->control->dev, |
| &dev_attr_iCountryCodeRelDate); |
| kfree(acm->country_codes); |
| } |
| device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities); |
| alloc_fail5: |
| usb_set_intfdata(intf, NULL); |
| for (i = 0; i < ACM_NW; i++) |
| usb_free_urb(acm->wb[i].urb); |
| alloc_fail4: |
| for (i = 0; i < num_rx_buf; i++) |
| usb_free_urb(acm->read_urbs[i]); |
| acm_read_buffers_free(acm); |
| usb_free_urb(acm->ctrlurb); |
| alloc_fail3: |
| acm_write_buffers_free(acm); |
| alloc_fail2: |
| usb_free_coherent(usb_dev, ctrlsize, acm->ctrl_buffer, acm->ctrl_dma); |
| alloc_fail1: |
| tty_port_put(&acm->port); |
| alloc_fail: |
| return rv; |
| } |
| |
| static void acm_disconnect(struct usb_interface *intf) |
| { |
| struct acm *acm = usb_get_intfdata(intf); |
| struct tty_struct *tty; |
| int i; |
| |
| /* sibling interface is already cleaning up */ |
| if (!acm) |
| return; |
| |
| mutex_lock(&acm->mutex); |
| acm->disconnected = true; |
| if (acm->country_codes) { |
| device_remove_file(&acm->control->dev, |
| &dev_attr_wCountryCodes); |
| device_remove_file(&acm->control->dev, |
| &dev_attr_iCountryCodeRelDate); |
| } |
| wake_up_all(&acm->wioctl); |
| device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities); |
| usb_set_intfdata(acm->control, NULL); |
| usb_set_intfdata(acm->data, NULL); |
| mutex_unlock(&acm->mutex); |
| |
| tty = tty_port_tty_get(&acm->port); |
| if (tty) { |
| tty_vhangup(tty); |
| tty_kref_put(tty); |
| } |
| |
| acm_kill_urbs(acm); |
| cancel_work_sync(&acm->work); |
| cancel_delayed_work_sync(&acm->dwork); |
| |
| tty_unregister_device(acm_tty_driver, acm->minor); |
| |
| usb_free_urb(acm->ctrlurb); |
| for (i = 0; i < ACM_NW; i++) |
| usb_free_urb(acm->wb[i].urb); |
| for (i = 0; i < acm->rx_buflimit; i++) |
| usb_free_urb(acm->read_urbs[i]); |
| acm_write_buffers_free(acm); |
| usb_free_coherent(acm->dev, acm->ctrlsize, acm->ctrl_buffer, acm->ctrl_dma); |
| acm_read_buffers_free(acm); |
| |
| kfree(acm->notification_buffer); |
| |
| if (!acm->combined_interfaces) |
| usb_driver_release_interface(&acm_driver, intf == acm->control ? |
| acm->data : acm->control); |
| |
| tty_port_put(&acm->port); |
| } |
| |
| #ifdef CONFIG_PM |
| static int acm_suspend(struct usb_interface *intf, pm_message_t message) |
| { |
| struct acm *acm = usb_get_intfdata(intf); |
| int cnt; |
| |
| spin_lock_irq(&acm->write_lock); |
| if (PMSG_IS_AUTO(message)) { |
| if (acm->transmitting) { |
| spin_unlock_irq(&acm->write_lock); |
| return -EBUSY; |
| } |
| } |
| cnt = acm->susp_count++; |
| spin_unlock_irq(&acm->write_lock); |
| |
| if (cnt) |
| return 0; |
| |
| acm_kill_urbs(acm); |
| cancel_work_sync(&acm->work); |
| cancel_delayed_work_sync(&acm->dwork); |
| acm->urbs_in_error_delay = 0; |
| |
| return 0; |
| } |
| |
| static int acm_resume(struct usb_interface *intf) |
| { |
| struct acm *acm = usb_get_intfdata(intf); |
| struct urb *urb; |
| int rv = 0; |
| |
| spin_lock_irq(&acm->write_lock); |
| |
| if (--acm->susp_count) |
| goto out; |
| |
| if (tty_port_initialized(&acm->port)) { |
| rv = usb_submit_urb(acm->ctrlurb, GFP_ATOMIC); |
| |
| for (;;) { |
| urb = usb_get_from_anchor(&acm->delayed); |
| if (!urb) |
| break; |
| |
| acm_start_wb(acm, urb->context); |
| } |
| |
| /* |
| * delayed error checking because we must |
| * do the write path at all cost |
| */ |
| if (rv < 0) |
| goto out; |
| |
| rv = acm_submit_read_urbs(acm, GFP_ATOMIC); |
| } |
| out: |
| spin_unlock_irq(&acm->write_lock); |
| |
| return rv; |
| } |
| |
| static int acm_reset_resume(struct usb_interface *intf) |
| { |
| struct acm *acm = usb_get_intfdata(intf); |
| |
| if (tty_port_initialized(&acm->port)) |
| tty_port_tty_hangup(&acm->port, false); |
| |
| return acm_resume(intf); |
| } |
| |
| #endif /* CONFIG_PM */ |
| |
| static int acm_pre_reset(struct usb_interface *intf) |
| { |
| struct acm *acm = usb_get_intfdata(intf); |
| |
| clear_bit(EVENT_RX_STALL, &acm->flags); |
| acm->nb_index = 0; /* pending control transfers are lost */ |
| |
| return 0; |
| } |
| |
| #define NOKIA_PCSUITE_ACM_INFO(x) \ |
| USB_DEVICE_AND_INTERFACE_INFO(0x0421, x, \ |
| USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \ |
| USB_CDC_ACM_PROTO_VENDOR) |
| |
| #define SAMSUNG_PCSUITE_ACM_INFO(x) \ |
| USB_DEVICE_AND_INTERFACE_INFO(0x04e7, x, \ |
| USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \ |
| USB_CDC_ACM_PROTO_VENDOR) |
| |
| /* |
| * USB driver structure. |
| */ |
| |
| static const struct usb_device_id acm_ids[] = { |
| /* quirky and broken devices */ |
| { USB_DEVICE(0x0424, 0x274e), /* Microchip Technology, Inc. (formerly SMSC) */ |
| .driver_info = DISABLE_ECHO, }, /* DISABLE ECHO in termios flag */ |
| { USB_DEVICE(0x076d, 0x0006), /* Denso Cradle CU-321 */ |
| .driver_info = NO_UNION_NORMAL, },/* has no union descriptor */ |
| { USB_DEVICE(0x17ef, 0x7000), /* Lenovo USB modem */ |
| .driver_info = NO_UNION_NORMAL, },/* has no union descriptor */ |
| { 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(0x0e8d, 0x2000), /* MediaTek Inc Preloader */ |
| .driver_info = DISABLE_ECHO, /* DISABLE ECHO in termios flag */ |
| }, |
| { USB_DEVICE(0x0e8d, 0x3329), /* MediaTek Inc GPS */ |
| .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, 0x1602), /* ZyDAS 56K USB MODEM */ |
| .driver_info = SINGLE_RX_URB, |
| }, |
| { 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(0x11ca, 0x0201), /* VeriFone Mx870 Gadget Serial */ |
| .driver_info = SINGLE_RX_URB, |
| }, |
| { USB_DEVICE(0x1965, 0x0018), /* Uniden UBC125XLT */ |
| .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ |
| }, |
| { 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(0x0572, 0x1324), /* Conexant USB MODEM RD02-D400 */ |
| .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ |
| }, |
| { USB_DEVICE(0x0572, 0x1328), /* Shiro / Aztech USB MODEM UM-3100 */ |
| .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ |
| }, |
| { USB_DEVICE(0x0572, 0x1349), /* Hiro (Conexant) USB MODEM H50228 */ |
| .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ |
| }, |
| { USB_DEVICE(0x20df, 0x0001), /* Simtec Electronics Entropy Key */ |
| .driver_info = QUIRK_CONTROL_LINE_STATE, }, |
| { USB_DEVICE(0x2184, 0x001c) }, /* GW Instek AFG-2225 */ |
| { USB_DEVICE(0x2184, 0x0036) }, /* GW Instek AFG-125 */ |
| { USB_DEVICE(0x22b8, 0x6425), /* Motorola MOTOMAGX phones */ |
| }, |
| /* Motorola H24 HSPA module: */ |
| { USB_DEVICE(0x22b8, 0x2d91) }, /* modem */ |
| { USB_DEVICE(0x22b8, 0x2d92), /* modem + diagnostics */ |
| .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ |
| }, |
| { USB_DEVICE(0x22b8, 0x2d93), /* modem + AT port */ |
| .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ |
| }, |
| { USB_DEVICE(0x22b8, 0x2d95), /* modem + AT port + diagnostics */ |
| .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ |
| }, |
| { USB_DEVICE(0x22b8, 0x2d96), /* modem + NMEA */ |
| .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ |
| }, |
| { USB_DEVICE(0x22b8, 0x2d97), /* modem + diagnostics + NMEA */ |
| .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ |
| }, |
| { USB_DEVICE(0x22b8, 0x2d99), /* modem + AT port + NMEA */ |
| .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ |
| }, |
| { USB_DEVICE(0x22b8, 0x2d9a), /* modem + AT port + diagnostics + NMEA */ |
| .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ |
| }, |
| |
| { USB_DEVICE(0x0572, 0x1329), /* Hummingbird huc56s (Conexant) */ |
| .driver_info = NO_UNION_NORMAL, /* union descriptor misplaced on |
| data interface instead of |
| communications interface. |
| Maybe we should define a new |
| quirk for this. */ |
| }, |
| { USB_DEVICE(0x0572, 0x1340), /* Conexant CX93010-2x UCMxx */ |
| .driver_info = NO_UNION_NORMAL, |
| }, |
| { USB_DEVICE(0x05f9, 0x4002), /* PSC Scanning, Magellan 800i */ |
| .driver_info = NO_UNION_NORMAL, |
| }, |
| { USB_DEVICE(0x1bbb, 0x0003), /* Alcatel OT-I650 */ |
| .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ |
| }, |
| { USB_DEVICE(0x1576, 0x03b1), /* Maretron USB100 */ |
| .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ |
| }, |
| { USB_DEVICE(0xfff0, 0x0100), /* DATECS FP-2000 */ |
| .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ |
| }, |
| { USB_DEVICE(0x09d8, 0x0320), /* Elatec GmbH TWN3 */ |
| .driver_info = NO_UNION_NORMAL, /* has misplaced union descriptor */ |
| }, |
| { USB_DEVICE(0x0ca6, 0xa050), /* Castles VEGA3000 */ |
| .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ |
| }, |
| |
| { USB_DEVICE(0x2912, 0x0001), /* ATOL FPrint */ |
| .driver_info = CLEAR_HALT_CONDITIONS, |
| }, |
| |
| /* Nokia S60 phones expose two ACM channels. The first is |
| * a modem and is picked up by the standard AT-command |
| * information below. The second is 'vendor-specific' but |
| * is treated as a serial device at the S60 end, so we want |
| * to expose it on Linux too. */ |
| { NOKIA_PCSUITE_ACM_INFO(0x042D), }, /* Nokia 3250 */ |
| { NOKIA_PCSUITE_ACM_INFO(0x04D8), }, /* Nokia 5500 Sport */ |
| { NOKIA_PCSUITE_ACM_INFO(0x04C9), }, /* Nokia E50 */ |
| { NOKIA_PCSUITE_ACM_INFO(0x0419), }, /* Nokia E60 */ |
| { NOKIA_PCSUITE_ACM_INFO(0x044D), }, /* Nokia E61 */ |
| { NOKIA_PCSUITE_ACM_INFO(0x0001), }, /* Nokia E61i */ |
| { NOKIA_PCSUITE_ACM_INFO(0x0475), }, /* Nokia E62 */ |
| { NOKIA_PCSUITE_ACM_INFO(0x0508), }, /* Nokia E65 */ |
| { NOKIA_PCSUITE_ACM_INFO(0x0418), }, /* Nokia E70 */ |
| { NOKIA_PCSUITE_ACM_INFO(0x0425), }, /* Nokia N71 */ |
| { NOKIA_PCSUITE_ACM_INFO(0x0486), }, /* Nokia N73 */ |
| { NOKIA_PCSUITE_ACM_INFO(0x04DF), }, /* Nokia N75 */ |
| { NOKIA_PCSUITE_ACM_INFO(0x000e), }, /* Nokia N77 */ |
| { NOKIA_PCSUITE_ACM_INFO(0x0445), }, /* Nokia N80 */ |
| { NOKIA_PCSUITE_ACM_INFO(0x042F), }, /* Nokia N91 & N91 8GB */ |
| { NOKIA_PCSUITE_ACM_INFO(0x048E), }, /* Nokia N92 */ |
| { NOKIA_PCSUITE_ACM_INFO(0x0420), }, /* Nokia N93 */ |
| { NOKIA_PCSUITE_ACM_INFO(0x04E6), }, /* Nokia N93i */ |
| { NOKIA_PCSUITE_ACM_INFO(0x04B2), }, /* Nokia 5700 XpressMusic */ |
| { NOKIA_PCSUITE_ACM_INFO(0x0134), }, /* Nokia 6110 Navigator (China) */ |
| { NOKIA_PCSUITE_ACM_INFO(0x046E), }, /* Nokia 6110 Navigator */ |
| { NOKIA_PCSUITE_ACM_INFO(0x002f), }, /* Nokia 6120 classic & */ |
| { NOKIA_PCSUITE_ACM_INFO(0x0088), }, /* Nokia 6121 classic */ |
| { NOKIA_PCSUITE_ACM_INFO(0x00fc), }, /* Nokia 6124 classic */ |
| { NOKIA_PCSUITE_ACM_INFO(0x0042), }, /* Nokia E51 */ |
| { NOKIA_PCSUITE_ACM_INFO(0x00b0), }, /* Nokia E66 */ |
| { NOKIA_PCSUITE_ACM_INFO(0x00ab), }, /* Nokia E71 */ |
| { NOKIA_PCSUITE_ACM_INFO(0x0481), }, /* Nokia N76 */ |
| { NOKIA_PCSUITE_ACM_INFO(0x0007), }, /* Nokia N81 & N81 8GB */ |
| { NOKIA_PCSUITE_ACM_INFO(0x0071), }, /* Nokia N82 */ |
| { NOKIA_PCSUITE_ACM_INFO(0x04F0), }, /* Nokia N95 & N95-3 NAM */ |
| { NOKIA_PCSUITE_ACM_INFO(0x0070), }, /* Nokia N95 8GB */ |
| { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */ |
| { NOKIA_PCSUITE_ACM_INFO(0x0099), }, /* Nokia 6210 Navigator, RM-367 */ |
| { NOKIA_PCSUITE_ACM_INFO(0x0128), }, /* Nokia 6210 Navigator, RM-419 */ |
| { NOKIA_PCSUITE_ACM_INFO(0x008f), }, /* Nokia 6220 Classic */ |
| { NOKIA_PCSUITE_ACM_INFO(0x00a0), }, /* Nokia 6650 */ |
| { NOKIA_PCSUITE_ACM_INFO(0x007b), }, /* Nokia N78 */ |
| { NOKIA_PCSUITE_ACM_INFO(0x0094), }, /* Nokia N85 */ |
| { NOKIA_PCSUITE_ACM_INFO(0x003a), }, /* Nokia N96 & N96-3 */ |
| { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */ |
| { NOKIA_PCSUITE_ACM_INFO(0x0108), }, /* Nokia 5320 XpressMusic 2G */ |
| { NOKIA_PCSUITE_ACM_INFO(0x01f5), }, /* Nokia N97, RM-505 */ |
| { NOKIA_PCSUITE_ACM_INFO(0x02e3), }, /* Nokia 5230, RM-588 */ |
| { NOKIA_PCSUITE_ACM_INFO(0x0178), }, /* Nokia E63 */ |
| { NOKIA_PCSUITE_ACM_INFO(0x010e), }, /* Nokia E75 */ |
| { NOKIA_PCSUITE_ACM_INFO(0x02d9), }, /* Nokia 6760 Slide */ |
| { NOKIA_PCSUITE_ACM_INFO(0x01d0), }, /* Nokia E52 */ |
| { NOKIA_PCSUITE_ACM_INFO(0x0223), }, /* Nokia E72 */ |
| { NOKIA_PCSUITE_ACM_INFO(0x0275), }, /* Nokia X6 */ |
| { NOKIA_PCSUITE_ACM_INFO(0x026c), }, /* Nokia N97 Mini */ |
| { NOKIA_PCSUITE_ACM_INFO(0x0154), }, /* Nokia 5800 XpressMusic */ |
| { NOKIA_PCSUITE_ACM_INFO(0x04ce), }, /* Nokia E90 */ |
| { NOKIA_PCSUITE_ACM_INFO(0x01d4), }, /* Nokia E55 */ |
| { NOKIA_PCSUITE_ACM_INFO(0x0302), }, /* Nokia N8 */ |
| { NOKIA_PCSUITE_ACM_INFO(0x0335), }, /* Nokia E7 */ |
| { NOKIA_PCSUITE_ACM_INFO(0x03cd), }, /* Nokia C7 */ |
| { SAMSUNG_PCSUITE_ACM_INFO(0x6651), }, /* Samsung GTi8510 (INNOV8) */ |
| |
| /* Support for Owen devices */ |
| { USB_DEVICE(0x03eb, 0x0030), }, /* Owen SI30 */ |
| |
| /* NOTE: non-Nokia COMM/ACM/0xff is likely MSFT RNDIS... NOT a modem! */ |
| |
| /* Support for Droids MuIn LCD */ |
| { USB_DEVICE(0x04d8, 0x000b), |
| .driver_info = NO_DATA_INTERFACE, |
| }, |
| |
| #if IS_ENABLED(CONFIG_INPUT_IMS_PCU) |
| { USB_DEVICE(0x04d8, 0x0082), /* Application mode */ |
| .driver_info = IGNORE_DEVICE, |
| }, |
| { USB_DEVICE(0x04d8, 0x0083), /* Bootloader mode */ |
| .driver_info = IGNORE_DEVICE, |
| }, |
| #endif |
| |
| #if IS_ENABLED(CONFIG_IR_TOY) |
| { USB_DEVICE(0x04d8, 0xfd08), |
| .driver_info = IGNORE_DEVICE, |
| }, |
| #endif |
| |
| /*Samsung phone in firmware update mode */ |
| { USB_DEVICE(0x04e8, 0x685d), |
| .driver_info = IGNORE_DEVICE, |
| }, |
| |
| /* Exclude Infineon Flash Loader utility */ |
| { USB_DEVICE(0x058b, 0x0041), |
| .driver_info = IGNORE_DEVICE, |
| }, |
| |
| { USB_DEVICE(0x1bc7, 0x0021), /* Telit 3G ACM only composition */ |
| .driver_info = SEND_ZERO_PACKET, |
| }, |
| { USB_DEVICE(0x1bc7, 0x0023), /* Telit 3G ACM + ECM composition */ |
| .driver_info = SEND_ZERO_PACKET, |
| }, |
| |
| /* control interfaces without any protocol set */ |
| { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, |
| USB_CDC_PROTO_NONE) }, |
| |
| /* 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) }, |
| |
| { USB_DEVICE(0x1519, 0x0452), /* Intel 7260 modem */ |
| .driver_info = SEND_ZERO_PACKET, |
| }, |
| |
| { } |
| }; |
| |
| 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, |
| .reset_resume = acm_reset_resume, |
| #endif |
| .pre_reset = acm_pre_reset, |
| .id_table = acm_ids, |
| #ifdef CONFIG_PM |
| .supports_autosuspend = 1, |
| #endif |
| .disable_hub_initiated_lpm = 1, |
| }; |
| |
| /* |
| * TTY driver structures. |
| */ |
| |
| static const struct tty_operations acm_ops = { |
| .install = acm_tty_install, |
| .open = acm_tty_open, |
| .close = acm_tty_close, |
| .cleanup = acm_tty_cleanup, |
| .hangup = acm_tty_hangup, |
| .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, |
| .get_serial = get_serial_info, |
| .set_serial = set_serial_info, |
| .get_icount = acm_tty_get_icount, |
| }; |
| |
| /* |
| * 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->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_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); |
| idr_destroy(&acm_minors); |
| } |
| |
| module_init(acm_init); |
| module_exit(acm_exit); |
| |
| MODULE_AUTHOR(DRIVER_AUTHOR); |
| MODULE_DESCRIPTION(DRIVER_DESC); |
| MODULE_LICENSE("GPL"); |
| MODULE_ALIAS_CHARDEV_MAJOR(ACM_TTY_MAJOR); |