* 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
*/
/*
*/
#undef DEBUG
+#undef VERBOSE_DEBUG
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/tty_driver.h>
#include <linux/tty_flip.h>
#include <linux/module.h>
-#include <linux/smp_lock.h>
#include <linux/mutex.h>
#include <asm/uaccess.h>
#include <linux/usb.h>
-#include <linux/usb_cdc.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 "v0.25"
+#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"
#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.
*/
int i, wbn;
struct acm_wb *wb;
- wbn = acm->write_current;
+ wbn = 0;
i = 0;
for (;;) {
wb = &acm->wb[wbn];
}
}
-static void acm_wb_free(struct acm *acm, int wbn)
-{
- acm->wb[wbn].use = 0;
-}
-
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;
}
-static inline int acm_wb_is_used(struct acm *acm, int wbn)
+/*
+ * Finish write. Caller must hold acm->write_lock
+ */
+static void acm_write_done(struct acm *acm, struct acm_wb *wb)
{
- return acm->wb[wbn].use;
+ wb->use = 0;
+ acm->transmitting--;
}
/*
- * Finish write.
+ * Poke write.
+ *
+ * the caller is responsible for locking
*/
-static void acm_write_done(struct acm *acm)
+
+static int acm_start_wb(struct acm *acm, struct acm_wb *wb)
{
- unsigned long flags;
- int wbn;
+ int rc;
- spin_lock_irqsave(&acm->write_lock, flags);
- acm->write_ready = 1;
- wbn = acm->write_current;
- acm_wb_free(acm, wbn);
- acm->write_current = (wbn + 1) % ACM_NW;
- spin_unlock_irqrestore(&acm->write_lock, flags);
+ 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;
}
-/*
- * Poke write.
- */
-static int acm_write_start(struct acm *acm)
+static int acm_write_start(struct acm *acm, int wbn)
{
unsigned long flags;
- int wbn;
- struct acm_wb *wb;
+ 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;
}
- if (!acm->write_ready) {
+ 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);
- wbn = acm->write_current;
- if (!acm_wb_is_used(acm, wbn)) {
- spin_unlock_irqrestore(&acm->write_lock, flags);
- return 0;
- }
- wb = &acm->wb[wbn];
-
- acm->write_ready = 0;
+ rc = acm_start_wb(acm, wb);
spin_unlock_irqrestore(&acm->write_lock, flags);
- acm->writeurb->transfer_buffer = wb->buf;
- acm->writeurb->transfer_dma = wb->dmah;
- acm->writeurb->transfer_buffer_length = wb->len;
- acm->writeurb->dev = acm->dev;
-
- if ((rc = usb_submit_urb(acm->writeurb, GFP_ATOMIC)) < 0) {
- dbg("usb_submit_urb(write bulk) failed: %d", rc);
- acm_write_done(acm);
- }
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 pt_regs *regs)
+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 status;
+ int retval;
+ int status = urb->status;
- switch (urb->status) {
+ switch (status) {
case 0:
/* success */
break;
case -ENOENT:
case -ESHUTDOWN:
/* this urb is terminated, clean up */
- dbg("%s - urb shutting down with status: %d", __FUNCTION__, urb->status);
+ dbg("%s - urb shutting down with status: %d", __func__, status);
return;
default:
- dbg("%s - nonzero urb status received: %d", __FUNCTION__, urb->status);
+ dbg("%s - nonzero urb status received: %d", __func__, status);
goto exit;
}
case USB_CDC_NOTIFY_SERIAL_STATE:
- newctrl = le16_to_cpu(get_unaligned((__le16 *) data));
+ newctrl = get_unaligned_le16(data);
if (acm->tty && !acm->clocal && (acm->ctrlin & ~newctrl & ACM_CTRL_DCD)) {
dbg("calling hangup");
break;
}
exit:
- status = usb_submit_urb (urb, GFP_ATOMIC);
- if (status)
- err ("%s - usb_submit_urb failed with result %d",
- __FUNCTION__, status);
+ 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 pt_regs *regs)
+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\n", urb->status);
- if (!ACM_READY(acm))
+ 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);
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);
/* nevertheless the tasklet must be kicked unconditionally
so the queue cannot dry up */
}
- tasklet_schedule(&acm->urb_task);
+ if (likely(!acm->susp_count))
+ tasklet_schedule(&acm->urb_task);
}
static void acm_rx_tasklet(unsigned long _acm)
struct acm_rb *buf;
struct tty_struct *tty = acm->tty;
struct acm_ru *rcv;
- //unsigned long flags;
- int i = 0;
+ unsigned long flags;
+ unsigned char throttled;
+
dbg("Entering acm_rx_tasklet");
- if (!ACM_READY(acm) || acm->throttle)
+ 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(&acm->read_lock);
+ spin_lock_irqsave(&acm->read_lock, flags);
if (list_empty(&acm->filled_read_bufs)) {
- spin_unlock(&acm->read_lock);
+ 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(&acm->read_lock);
+ spin_unlock_irqrestore(&acm->read_lock, flags);
- dbg("acm_rx_tasklet: procesing buf 0x%p, size = %d\n", buf, buf->size);
+ dbg("acm_rx_tasklet: procesing buf 0x%p, size = %d", buf, buf->size);
tty_buffer_request_room(tty, buf->size);
- if (!acm->throttle)
+ 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);
- spin_lock(&acm->throttle_lock);
- if (acm->throttle) {
- dbg("Throtteling noticed");
- memmove(buf->base, buf->base + i, buf->size - i);
- buf->size -= i;
- spin_unlock(&acm->throttle_lock);
- spin_lock(&acm->read_lock);
+ if (throttled) {
+ dbg("Throttling noticed");
+ spin_lock_irqsave(&acm->read_lock, flags);
list_add(&buf->list, &acm->filled_read_bufs);
- spin_unlock(&acm->read_lock);
+ spin_unlock_irqrestore(&acm->read_lock, flags);
return;
}
- spin_unlock(&acm->throttle_lock);
- spin_lock(&acm->read_lock);
+ spin_lock_irqsave(&acm->read_lock, flags);
list_add(&buf->list, &acm->spare_read_bufs);
- spin_unlock(&acm->read_lock);
+ spin_unlock_irqrestore(&acm->read_lock, flags);
goto next_buffer;
urbs:
while (!list_empty(&acm->spare_read_bufs)) {
- spin_lock(&acm->read_lock);
+ spin_lock_irqsave(&acm->read_lock, flags);
if (list_empty(&acm->spare_read_urbs)) {
- spin_unlock(&acm->read_lock);
+ 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(&acm->read_lock);
+ spin_unlock_irqrestore(&acm->read_lock, flags);
buf = list_entry(acm->spare_read_bufs.next,
struct acm_rb, list);
rcv->urb->transfer_dma = buf->dma;
rcv->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
- dbg("acm_rx_tasklet: sending urb 0x%p, rcv 0x%p, buf 0x%p\n", rcv->urb, rcv, buf);
-
/* This shouldn't kill the driver as unsuccessful URBs are returned to the
free-urbs-pool and resubmited ASAP */
- if (usb_submit_urb(rcv->urb, GFP_ATOMIC) < 0) {
+ 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);
- spin_lock(&acm->read_lock);
list_add(&rcv->list, &acm->spare_read_urbs);
- spin_unlock(&acm->read_lock);
+ 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 pt_regs *regs)
+static void acm_write_bulk(struct urb *urb)
{
- struct acm *acm = (struct acm *)urb->context;
+ struct acm_wb *wb = urb->context;
+ struct acm *acm = wb->instance;
+ unsigned long flags;
- dbg("Entering acm_write_bulk with status %d\n", urb->status);
+ 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);
- acm_write_done(acm);
- acm_write_start(acm);
+ 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(void *private)
+static void acm_softint(struct work_struct *work)
{
- struct acm *acm = private;
- dbg("Entering acm_softint.\n");
-
+ 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
*/
struct acm *acm;
int rv = -EINVAL;
int i;
- dbg("Entering acm_tty_open.\n");
+ dbg("Entering acm_tty_open.");
mutex_lock(&open_mutex);
else
rv = 0;
+ set_bit(TTY_NO_WRITE_SPLIT, &tty->flags);
tty->driver_data = acm;
acm->tty = tty;
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))
+ 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);
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;
}
usb_put_intf(acm->control);
acm_table[acm->minor] = NULL;
usb_free_urb(acm->ctrlurb);
- usb_free_urb(acm->writeurb);
+ 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;
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);
- usb_kill_urb(acm->writeurb);
+ 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);
}
int wbn;
struct acm_wb *wb;
- dbg("Entering acm_tty_write to write %d bytes,\n", count);
+ dbg("Entering acm_tty_write to write %d bytes,", count);
if (!ACM_READY(acm))
return -EINVAL;
spin_lock_irqsave(&acm->write_lock, flags);
if ((wbn = acm_wb_alloc(acm)) < 0) {
spin_unlock_irqrestore(&acm->write_lock, flags);
- acm_write_start(acm);
return 0;
}
wb = &acm->wb[wbn];
wb->len = count;
spin_unlock_irqrestore(&acm->write_lock, flags);
- if ((stat = acm_write_start(acm)) < 0)
+ if ((stat = acm_write_start(acm, wbn)) < 0)
return stat;
return count;
}
* Do not let the line discipline to know that we have a reserve,
* or it might get too enthusiastic.
*/
- return (acm->write_ready && acm_wb_is_avail(acm)) ? acm->writesize : 0;
+ return acm_wb_is_avail(acm) ? acm->writesize : 0;
}
static int acm_tty_chars_in_buffer(struct tty_struct *tty)
tasklet_schedule(&acm->urb_task);
}
-static void acm_tty_break_ctl(struct tty_struct *tty, int state)
+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;
- if (acm_send_break(acm, state ? 0xffff : 0))
+ 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)
5, 6, 7, 8
};
-static void acm_tty_set_termios(struct tty_struct *tty, struct termios *termios_old)
+static void acm_tty_set_termios(struct tty_struct *tty, struct ktermios *termios_old)
{
struct acm *acm = tty->driver_data;
- struct termios *termios = tty->termios;
+ struct ktermios *termios = tty->termios;
struct usb_cdc_line_coding newline;
int newctrl = acm->ctrlout;
* USB probe and disconnect routines.
*/
-/* Little helper: write buffers free */
+/* 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(acm->dev, acm->writesize, wb->buf, wb->dmah);
+ 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)
{
const struct usb_device_id *id)
{
struct usb_cdc_union_desc *union_header = NULL;
- char *buffer = intf->altsetting->extra;
+ 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;
/* normal probing*/
if (!buffer) {
- err("Wierd descriptor references\n");
+ dev_err(&intf->dev, "Weird descriptor references\n");
return -EINVAL;
}
buflen = intf->cur_altsetting->endpoint->extralen;
buffer = intf->cur_altsetting->endpoint->extra;
} else {
- err("Zero length descriptor references\n");
+ dev_err(&intf->dev,
+ "Zero length descriptor references\n");
return -EINVAL;
}
}
while (buflen > 0) {
if (buffer [1] != USB_DT_CS_INTERFACE) {
- err("skipping garbage\n");
+ 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) {
- err("More than one union descriptor, skipping ...");
+ 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: /* maybe somehow export */
- break; /* for now we ignore it */
+ 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:
call_management_function = buffer[3];
call_interface_num = buffer[4];
if ((call_management_function & 3) != 3)
- err("This device cannot do calls on its own. It is no modem.");
+ dev_err(&intf->dev, "This device "
+ "cannot do calls on its own. "
+ "It is no modem.\n");
break;
-
default:
- err("Ignoring extra header, type %d, length %d", buffer[2], buffer[0]);
+ /* 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:
}
if (data_interface_num != call_interface_num)
- dev_dbg(&intf->dev,"Seperate call control interface. That is not fully supported.\n");
+ dev_dbg(&intf->dev,"Separate call control interface. That is not fully supported.\n");
skip_normal_probe:
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");
/* workaround for switched endpoints */
- if ((epread->bEndpointAddress & USB_DIR_IN) != USB_DIR_IN) {
+ 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");
for (minor = 0; minor < ACM_TTY_MINORS && acm_table[minor]; minor++);
if (minor == ACM_TTY_MINORS) {
- err("no more free acm devices");
+ dev_err(&intf->dev, "no more free acm devices\n");
return -ENODEV;
}
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);
+ acm->writesize = le16_to_cpu(epwrite->wMaxPacketSize) * 20;
acm->control = control_interface;
acm->data = data_interface;
acm->minor = minor;
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, 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);
- acm->write_ready = 1;
+ 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);
rcv->instance = acm;
}
for (i = 0; i < num_rx_buf; i++) {
- struct acm_rb *buf = &(acm->rb[i]);
+ struct acm_rb *rb = &(acm->rb[i]);
- if (!(buf->base = usb_buffer_alloc(acm->dev, readsize, GFP_KERNEL, &buf->dma))) {
+ 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;
}
}
- acm->writeurb = usb_alloc_urb(0, GFP_KERNEL);
- if (!acm->writeurb) {
- dev_dbg(&intf->dev, "out of memory (writeurb kmalloc)\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;
- usb_fill_bulk_urb(acm->writeurb, usb_dev, usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress),
- NULL, acm->writesize, acm_write_bulk, acm);
- acm->writeurb->transfer_flags |= URB_NO_FSBR | URB_NO_TRANSFER_DMA_MAP;
-
dev_info(&intf->dev, "ttyACM%d: USB ACM device\n", minor);
acm_set_control(acm, acm->ctrlout);
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;
- usb_set_intfdata (intf, acm);
- return 0;
+ return 0;
+alloc_fail8:
+ for (i = 0; i < ACM_NW; i++)
+ usb_free_urb(acm->wb[i].urb);
alloc_fail7:
- for (i = 0; i < num_rx_buf; i++)
- usb_buffer_free(usb_dev, acm->readsize, acm->rb[i].base, acm->rb[i].dma);
+ 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);
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 acm *acm = usb_get_intfdata(intf);
struct usb_device *usb_dev = interface_to_usbdev(intf);
- int i;
- if (!acm || !acm->dev) {
- dbg("disconnect on nonexisting interface");
+ /* sibling interface is already cleaning up */
+ if (!acm)
return;
- }
mutex_lock(&open_mutex);
- if (!usb_get_intfdata(intf)) {
- mutex_unlock(&open_mutex);
- return;
+ 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);
- tasklet_disable(&acm->urb_task);
-
- usb_kill_urb(acm->ctrlurb);
- usb_kill_urb(acm->writeurb);
- for (i = 0; i < acm->rx_buflimit; i++)
- usb_kill_urb(acm->ru[i].urb);
-
- INIT_LIST_HEAD(&acm->filled_read_bufs);
- INIT_LIST_HEAD(&acm->spare_read_bufs);
-
- tasklet_enable(&acm->urb_task);
-
- flush_scheduled_work(); /* wait for acm_softint */
+ stop_data_traffic(acm);
acm_write_buffers_free(acm);
usb_buffer_free(usb_dev, acm->ctrlsize, acm->ctrl_buffer, acm->ctrl_dma);
- for (i = 0; i < acm->rx_buflimit; i++)
- usb_buffer_free(usb_dev, acm->readsize, acm->rb[i].base, acm->rb[i].dma);
+ acm_read_buffers_free(acm);
- usb_driver_release_interface(&acm_driver, intf == acm->control ? acm->data : intf);
+ usb_driver_release_interface(&acm_driver, intf == acm->control ?
+ acm->data : acm->control);
if (!acm->used) {
acm_tty_unregister(acm);
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 (message.event & PM_EVENT_AUTO) {
+ 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.
*/
{ 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, 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, 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(0x0572, 0x1324), /* Conexant USB MODEM RD02-D400 */
+ .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
+ },
+
/* control interfaces with various AT-command sets */
{ USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
USB_CDC_ACM_PROTO_AT_V25TER) },
.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 struct tty_operations acm_ops = {
+static const struct tty_operations acm_ops = {
.open = acm_tty_open,
.close = acm_tty_close,
.write = acm_tty_write,
acm_tty_driver->owner = THIS_MODULE,
acm_tty_driver->driver_name = "acm",
acm_tty_driver->name = "ttyACM",
- acm_tty_driver->devfs_name = "usb/acm/",
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_NO_DEVFS,
+ 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);
return retval;
}
- info(DRIVER_VERSION ":" DRIVER_DESC);
+ printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
+ DRIVER_DESC "\n");
return 0;
}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff