acm.c
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上传日期:2013-02-24
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- /*
- * acm.c Version 0.21
- *
- * 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>
- *
- * 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
- */
- /*
- * 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
- */
- #include <linux/kernel.h>
- #include <linux/sched.h>
- #include <linux/signal.h>
- #include <linux/errno.h>
- #include <linux/poll.h>
- #include <linux/init.h>
- #include <linux/slab.h>
- #include <linux/fcntl.h>
- #include <linux/tty.h>
- #include <linux/tty_driver.h>
- #include <linux/tty_flip.h>
- #include <linux/module.h>
- #include <linux/smp_lock.h>
- #undef DEBUG
- #include <linux/usb.h>
- /*
- * Version Information
- */
- #define DRIVER_VERSION "v0.21"
- #define DRIVER_AUTHOR "Armin Fuerst, Pavel Machek, Johannes Erdfelt, Vojtech Pavlik"
- #define DRIVER_DESC "USB Abstract Control Model driver for USB modems and ISDN adapters"
- /*
- * CMSPAR, some architectures can't have space and mark parity.
- */
- #ifndef CMSPAR
- #define CMSPAR 0
- #endif
- /*
- * Major and minor numbers.
- */
- #define ACM_TTY_MAJOR 166
- #define ACM_TTY_MINORS 32
- /*
- * Requests.
- */
- #define USB_RT_ACM (USB_TYPE_CLASS | USB_RECIP_INTERFACE)
- #define ACM_REQ_COMMAND 0x00
- #define ACM_REQ_RESPONSE 0x01
- #define ACM_REQ_SET_FEATURE 0x02
- #define ACM_REQ_GET_FEATURE 0x03
- #define ACM_REQ_CLEAR_FEATURE 0x04
- #define ACM_REQ_SET_LINE 0x20
- #define ACM_REQ_GET_LINE 0x21
- #define ACM_REQ_SET_CONTROL 0x22
- #define ACM_REQ_SEND_BREAK 0x23
- /*
- * IRQs.
- */
- #define ACM_IRQ_NETWORK 0x00
- #define ACM_IRQ_LINE_STATE 0x20
- /*
- * Output control lines.
- */
- #define ACM_CTRL_DTR 0x01
- #define ACM_CTRL_RTS 0x02
- /*
- * Input control lines and line errors.
- */
- #define ACM_CTRL_DCD 0x01
- #define ACM_CTRL_DSR 0x02
- #define ACM_CTRL_BRK 0x04
- #define ACM_CTRL_RI 0x08
- #define ACM_CTRL_FRAMING 0x10
- #define ACM_CTRL_PARITY 0x20
- #define ACM_CTRL_OVERRUN 0x40
- /*
- * Line speed and caracter encoding.
- */
- struct acm_line {
- __u32 speed;
- __u8 stopbits;
- __u8 parity;
- __u8 databits;
- } __attribute__ ((packed));
- /*
- * Internal driver structures.
- */
- struct acm {
- struct usb_device *dev; /* the coresponding usb device */
- struct usb_interface *iface; /* the interfaces - +0 control +1 data */
- struct tty_struct *tty; /* the coresponding tty */
- struct urb ctrlurb, readurb, writeurb; /* urbs */
- struct acm_line line; /* line coding (bits, stop, parity) */
- struct tq_struct tqueue; /* task queue for line discipline waking up */
- unsigned int ctrlin; /* input control lines (DCD, DSR, RI, break, overruns) */
- unsigned int ctrlout; /* output control lines (DTR, RTS) */
- unsigned int writesize; /* max packet size for the output bulk endpoint */
- unsigned int used; /* someone has this acm's device open */
- unsigned int minor; /* acm minor number */
- unsigned char throttle; /* throttled by tty layer */
- unsigned char clocal; /* termios CLOCAL */
- };
- static struct usb_driver acm_driver;
- static struct tty_driver acm_tty_driver;
- static struct acm *acm_table[ACM_TTY_MINORS];
- #define ACM_READY(acm) (acm && acm->dev && acm->used)
- /*
- * 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->iface[0].altsetting[0].bInterfaceNumber, buf, len, HZ * 5);
- dbg("acm_control_msg: rq: 0x%02x val: %#x len: %#x result: %d", request, value, len, retval);
- return retval < 0 ? retval : 0;
- }
- #define acm_set_control(acm, control) acm_ctrl_msg(acm, ACM_REQ_SET_CONTROL, control, NULL, 0)
- #define acm_set_line(acm, line) acm_ctrl_msg(acm, ACM_REQ_SET_LINE, 0, line, sizeof(struct acm_line))
- #define acm_send_break(acm, ms) acm_ctrl_msg(acm, ACM_REQ_SEND_BREAK, ms, NULL, 0)
- /*
- * Interrupt handler for various ACM control events
- */
- static void acm_ctrl_irq(struct urb *urb)
- {
- struct acm *acm = urb->context;
- devrequest *dr = urb->transfer_buffer;
- unsigned char *data = (unsigned char *)(dr + 1);
- int newctrl;
- if (!ACM_READY(acm)) return;
- if (urb->status < 0) {
- dbg("nonzero ctrl irq status received: %d", urb->status);
- return;
- }
- switch (dr->request) {
- case ACM_IRQ_NETWORK:
- dbg("%s network", data[0] ? "connected to" : "disconnected from");
- return;
- case ACM_IRQ_LINE_STATE:
- newctrl = le16_to_cpup((__u16 *) 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 ? '+' : '-');
- return;
- default:
- dbg("unknown control event received: request %d index %d len %d data0 %d data1 %d",
- dr->request, dr->index, dr->length, data[0], data[1]);
- return;
- }
- }
- static void acm_read_bulk(struct urb *urb)
- {
- struct acm *acm = urb->context;
- struct tty_struct *tty = acm->tty;
- unsigned char *data = urb->transfer_buffer;
- int i = 0;
- if (!ACM_READY(acm)) return;
- if (urb->status)
- dbg("nonzero read bulk status received: %d", urb->status);
- if (!urb->status & !acm->throttle) {
- for (i = 0; i < urb->actual_length && !acm->throttle; i++) {
- /* if we insert more than TTY_FLIPBUF_SIZE characters,
- * we drop them. */
- if (tty->flip.count >= TTY_FLIPBUF_SIZE) {
- tty_flip_buffer_push(tty);
- }
- tty_insert_flip_char(tty, data[i], 0);
- }
- tty_flip_buffer_push(tty);
- }
- if (acm->throttle) {
- memmove(data, data + i, urb->actual_length - i);
- urb->actual_length -= i;
- return;
- }
- urb->actual_length = 0;
- urb->dev = acm->dev;
- if (usb_submit_urb(urb))
- dbg("failed resubmitting read urb");
- }
- static void acm_write_bulk(struct urb *urb)
- {
- struct acm *acm = (struct acm *)urb->context;
- if (!ACM_READY(acm)) return;
- if (urb->status)
- dbg("nonzero write bulk status received: %d", urb->status);
- queue_task(&acm->tqueue, &tq_immediate);
- mark_bh(IMMEDIATE_BH);
- }
- static void acm_softint(void *private)
- {
- struct acm *acm = private;
- struct tty_struct *tty = acm->tty;
- if (!ACM_READY(acm)) return;
- if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) && tty->ldisc.write_wakeup)
- (tty->ldisc.write_wakeup)(tty);
- wake_up_interruptible(&tty->write_wait);
- }
- /*
- * TTY handlers
- */
- static int acm_tty_open(struct tty_struct *tty, struct file *filp)
- {
- struct acm *acm = acm_table[MINOR(tty->device)];
- if (!acm || !acm->dev) return -EINVAL;
- tty->driver_data = acm;
- acm->tty = tty;
- MOD_INC_USE_COUNT;
- lock_kernel();
- if (acm->used++) {
- unlock_kernel();
- return 0;
- }
- unlock_kernel();
- acm->ctrlurb.dev = acm->dev;
- if (usb_submit_urb(&acm->ctrlurb))
- dbg("usb_submit_urb(ctrl irq) failed");
- acm->readurb.dev = acm->dev;
- if (usb_submit_urb(&acm->readurb))
- dbg("usb_submit_urb(read bulk) failed");
- acm_set_control(acm, acm->ctrlout = ACM_CTRL_DTR | ACM_CTRL_RTS);
- /* 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;
- return 0;
- }
- static void acm_tty_close(struct tty_struct *tty, struct file *filp)
- {
- struct acm *acm = tty->driver_data;
- if (!acm || !acm->used) return;
- if (!--acm->used) {
- if (acm->dev) {
- acm_set_control(acm, acm->ctrlout = 0);
- usb_unlink_urb(&acm->ctrlurb);
- usb_unlink_urb(&acm->writeurb);
- usb_unlink_urb(&acm->readurb);
- } else {
- tty_unregister_devfs(&acm_tty_driver, acm->minor);
- acm_table[acm->minor] = NULL;
- kfree(acm);
- }
- }
- MOD_DEC_USE_COUNT;
- }
- static int acm_tty_write(struct tty_struct *tty, int from_user, const unsigned char *buf, int count)
- {
- struct acm *acm = tty->driver_data;
- if (!ACM_READY(acm)) return -EINVAL;
- if (acm->writeurb.status == -EINPROGRESS) return 0;
- if (!count) return 0;
- count = (count > acm->writesize) ? acm->writesize : count;
- if (from_user)
- copy_from_user(acm->writeurb.transfer_buffer, buf, count);
- else
- memcpy(acm->writeurb.transfer_buffer, buf, count);
- acm->writeurb.transfer_buffer_length = count;
- acm->writeurb.dev = acm->dev;
- if (usb_submit_urb(&acm->writeurb))
- dbg("usb_submit_urb(write bulk) failed");
- return count;
- }
- static int acm_tty_write_room(struct tty_struct *tty)
- {
- struct acm *acm = tty->driver_data;
- if (!ACM_READY(acm)) return -EINVAL;
- return acm->writeurb.status == -EINPROGRESS ? 0 : acm->writesize;
- }
- static int acm_tty_chars_in_buffer(struct tty_struct *tty)
- {
- struct acm *acm = tty->driver_data;
- if (!ACM_READY(acm)) return -EINVAL;
- return acm->writeurb.status == -EINPROGRESS ? acm->writeurb.transfer_buffer_length : 0;
- }
- static void acm_tty_throttle(struct tty_struct *tty)
- {
- struct acm *acm = tty->driver_data;
- if (!ACM_READY(acm)) return;
- acm->throttle = 1;
- }
- static void acm_tty_unthrottle(struct tty_struct *tty)
- {
- struct acm *acm = tty->driver_data;
- if (!ACM_READY(acm)) return;
- acm->throttle = 0;
- if (acm->readurb.status != -EINPROGRESS)
- acm_read_bulk(&acm->readurb);
- }
- static void acm_tty_break_ctl(struct tty_struct *tty, int state)
- {
- struct acm *acm = tty->driver_data;
- if (!ACM_READY(acm)) return;
- if (acm_send_break(acm, state ? 0xffff : 0))
- dbg("send break failed");
- }
- static int acm_tty_ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg)
- {
- struct acm *acm = tty->driver_data;
- unsigned int mask, newctrl;
- if (!ACM_READY(acm)) return -EINVAL;
- switch (cmd) {
- case TIOCMGET:
- return put_user((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, (unsigned long *) arg);
- case TIOCMSET:
- case TIOCMBIS:
- case TIOCMBIC:
- if (get_user(mask, (unsigned long *) arg))
- return -EFAULT;
- newctrl = acm->ctrlout;
- mask = (mask & TIOCM_DTR ? ACM_CTRL_DTR : 0) | (mask & TIOCM_RTS ? ACM_CTRL_RTS : 0);
- switch (cmd) {
- case TIOCMSET: newctrl = mask; break;
- case TIOCMBIS: newctrl |= mask; break;
- case TIOCMBIC: newctrl &= ~mask; break;
- }
- if (acm->ctrlout == newctrl) return 0;
- return acm_set_control(acm, acm->ctrlout = newctrl);
- }
- return -ENOIOCTLCMD;
- }
- static __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 __u8 acm_tty_size[] = {
- 5, 6, 7, 8
- };
- static void acm_tty_set_termios(struct tty_struct *tty, struct termios *termios_old)
- {
- struct acm *acm = tty->driver_data;
- struct termios *termios = tty->termios;
- struct acm_line newline;
- int newctrl = acm->ctrlout;
- if (!ACM_READY(acm)) return;
- newline.speed = cpu_to_le32p(acm_tty_speed +
- (termios->c_cflag & CBAUD & ~CBAUDEX) + (termios->c_cflag & CBAUDEX ? 15 : 0));
- newline.stopbits = termios->c_cflag & CSTOPB ? 2 : 0;
- newline.parity = termios->c_cflag & PARENB ?
- (termios->c_cflag & PARODD ? 1 : 2) + (termios->c_cflag & CMSPAR ? 2 : 0) : 0;
- newline.databits = acm_tty_size[(termios->c_cflag & CSIZE) >> 4];
- acm->clocal = ((termios->c_cflag & CLOCAL) != 0);
- if (!newline.speed) {
- newline.speed = acm->line.speed;
- 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(struct acm_line))) {
- memcpy(&acm->line, &newline, sizeof(struct acm_line));
- dbg("set line: %d %d %d %d", newline.speed, newline.stopbits, newline.parity, newline.databits);
- acm_set_line(acm, &acm->line);
- }
- }
- /*
- * USB probe and disconnect routines.
- */
- static void *acm_probe(struct usb_device *dev, unsigned int ifnum,
- const struct usb_device_id *id)
- {
- struct acm *acm;
- struct usb_config_descriptor *cfacm;
- struct usb_interface_descriptor *ifcom, *ifdata;
- struct usb_endpoint_descriptor *epctrl, *epread, *epwrite;
- int readsize, ctrlsize, minor, i;
- unsigned char *buf;
- for (i = 0; i < dev->descriptor.bNumConfigurations; i++) {
- cfacm = dev->config + i;
- dbg("probing config %d", cfacm->bConfigurationValue);
- if (cfacm->bNumInterfaces != 2 ||
- usb_interface_claimed(cfacm->interface + 0) ||
- usb_interface_claimed(cfacm->interface + 1))
- continue;
- ifcom = cfacm->interface[0].altsetting + 0;
- ifdata = cfacm->interface[1].altsetting + 0;
- if (ifdata->bInterfaceClass != 10 || ifdata->bNumEndpoints < 2) {
- ifcom = cfacm->interface[1].altsetting + 0;
- ifdata = cfacm->interface[0].altsetting + 0;
- if (ifdata->bInterfaceClass != 10 || ifdata->bNumEndpoints < 2)
- continue;
- }
- if (ifcom->bInterfaceClass != 2 || ifcom->bInterfaceSubClass != 2 ||
- ifcom->bInterfaceProtocol != 1 || ifcom->bNumEndpoints < 1)
- continue;
- epctrl = ifcom->endpoint + 0;
- epread = ifdata->endpoint + 0;
- epwrite = ifdata->endpoint + 1;
- if ((epctrl->bEndpointAddress & 0x80) != 0x80 || (epctrl->bmAttributes & 3) != 3 ||
- (epread->bmAttributes & 3) != 2 || (epwrite->bmAttributes & 3) != 2 ||
- ((epread->bEndpointAddress & 0x80) ^ (epwrite->bEndpointAddress & 0x80)) != 0x80)
- continue;
- if ((epread->bEndpointAddress & 0x80) != 0x80) {
- epread = ifdata->endpoint + 1;
- epwrite = ifdata->endpoint + 0;
- }
- usb_set_configuration(dev, cfacm->bConfigurationValue);
- for (minor = 0; minor < ACM_TTY_MINORS && acm_table[minor]; minor++);
- if (acm_table[minor]) {
- err("no more free acm devices");
- return NULL;
- }
- if (!(acm = kmalloc(sizeof(struct acm), GFP_KERNEL))) {
- err("out of memory");
- return NULL;
- }
- memset(acm, 0, sizeof(struct acm));
- ctrlsize = epctrl->wMaxPacketSize;
- readsize = epread->wMaxPacketSize;
- acm->writesize = epwrite->wMaxPacketSize;
- acm->iface = cfacm->interface;
- acm->minor = minor;
- acm->dev = dev;
- acm->tqueue.routine = acm_softint;
- acm->tqueue.data = acm;
- if (!(buf = kmalloc(ctrlsize + readsize + acm->writesize, GFP_KERNEL))) {
- err("out of memory");
- kfree(acm);
- return NULL;
- }
- FILL_INT_URB(&acm->ctrlurb, dev, usb_rcvintpipe(dev, epctrl->bEndpointAddress),
- buf, ctrlsize, acm_ctrl_irq, acm, epctrl->bInterval);
- FILL_BULK_URB(&acm->readurb, dev, usb_rcvbulkpipe(dev, epread->bEndpointAddress),
- buf += ctrlsize, readsize, acm_read_bulk, acm);
- acm->readurb.transfer_flags |= USB_NO_FSBR;
- FILL_BULK_URB(&acm->writeurb, dev, usb_sndbulkpipe(dev, epwrite->bEndpointAddress),
- buf += readsize, acm->writesize, acm_write_bulk, acm);
- acm->writeurb.transfer_flags |= USB_NO_FSBR;
- printk(KERN_INFO "ttyACM%d: USB ACM devicen", minor);
- acm_set_control(acm, acm->ctrlout);
- acm->line.speed = cpu_to_le32(9600);
- acm->line.databits = 8;
- acm_set_line(acm, &acm->line);
- usb_driver_claim_interface(&acm_driver, acm->iface + 0, acm);
- usb_driver_claim_interface(&acm_driver, acm->iface + 1, acm);
- tty_register_devfs(&acm_tty_driver, 0, minor);
- return acm_table[minor] = acm;
- }
- return NULL;
- }
- static void acm_disconnect(struct usb_device *dev, void *ptr)
- {
- struct acm *acm = ptr;
- if (!acm || !acm->dev) {
- dbg("disconnect on nonexisting interface");
- return;
- }
- acm->dev = NULL;
- usb_unlink_urb(&acm->ctrlurb);
- usb_unlink_urb(&acm->readurb);
- usb_unlink_urb(&acm->writeurb);
- kfree(acm->ctrlurb.transfer_buffer);
- usb_driver_release_interface(&acm_driver, acm->iface + 0);
- usb_driver_release_interface(&acm_driver, acm->iface + 1);
- if (!acm->used) {
- tty_unregister_devfs(&acm_tty_driver, acm->minor);
- acm_table[acm->minor] = NULL;
- kfree(acm);
- return;
- }
- if (acm->tty)
- tty_hangup(acm->tty);
- }
- /*
- * USB driver structure.
- */
- static struct usb_device_id acm_ids[] = {
- { USB_DEVICE_INFO(USB_CLASS_COMM, 0, 0) },
- { }
- };
- MODULE_DEVICE_TABLE (usb, acm_ids);
- static struct usb_driver acm_driver = {
- name: "acm",
- probe: acm_probe,
- disconnect: acm_disconnect,
- id_table: acm_ids,
- };
- /*
- * TTY driver structures.
- */
- static int acm_tty_refcount;
- static struct tty_struct *acm_tty_table[ACM_TTY_MINORS];
- static struct termios *acm_tty_termios[ACM_TTY_MINORS];
- static struct termios *acm_tty_termios_locked[ACM_TTY_MINORS];
- static struct tty_driver acm_tty_driver = {
- magic: TTY_DRIVER_MAGIC,
- driver_name: "acm",
- name: "usb/acm/%d",
- major: ACM_TTY_MAJOR,
- minor_start: 0,
- num: ACM_TTY_MINORS,
- type: TTY_DRIVER_TYPE_SERIAL,
- subtype: SERIAL_TYPE_NORMAL,
- flags: TTY_DRIVER_REAL_RAW | TTY_DRIVER_NO_DEVFS,
- refcount: &acm_tty_refcount,
- table: acm_tty_table,
- termios: acm_tty_termios,
- termios_locked: acm_tty_termios_locked,
- 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
- };
- /*
- * Init / exit.
- */
- static int __init acm_init(void)
- {
- acm_tty_driver.init_termios = tty_std_termios;
- acm_tty_driver.init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL;
- if (tty_register_driver(&acm_tty_driver))
- return -1;
- if (usb_register(&acm_driver) < 0) {
- tty_unregister_driver(&acm_tty_driver);
- return -1;
- }
- info(DRIVER_VERSION ":" DRIVER_DESC);
- return 0;
- }
- static void __exit acm_exit(void)
- {
- usb_deregister(&acm_driver);
- tty_unregister_driver(&acm_tty_driver);
- }
- module_init(acm_init);
- module_exit(acm_exit);
- MODULE_AUTHOR( DRIVER_AUTHOR );
- MODULE_DESCRIPTION( DRIVER_DESC );
- MODULE_LICENSE("GPL");