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path: root/drivers/usb/class/cdc-acm.c
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Diffstat (limited to 'drivers/usb/class/cdc-acm.c')
-rw-r--r--drivers/usb/class/cdc-acm.c158
1 files changed, 122 insertions, 36 deletions
diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c
index e3861b2..975d556 100644
--- a/drivers/usb/class/cdc-acm.c
+++ b/drivers/usb/class/cdc-acm.c
@@ -170,6 +170,7 @@ static void acm_write_done(struct acm *acm, struct acm_wb *wb)
{
wb->use = 0;
acm->transmitting--;
+ usb_autopm_put_interface_async(acm->control);
}
/*
@@ -211,9 +212,12 @@ static int acm_write_start(struct acm *acm, int wbn)
}
dbg("%s susp_count: %d", __func__, acm->susp_count);
+ usb_autopm_get_interface_async(acm->control);
if (acm->susp_count) {
- acm->delayed_wb = wb;
- schedule_work(&acm->waker);
+ if (!acm->delayed_wb)
+ acm->delayed_wb = wb;
+ else
+ usb_autopm_put_interface_async(acm->control);
spin_unlock_irqrestore(&acm->write_lock, flags);
return 0; /* A white lie */
}
@@ -424,7 +428,6 @@ next_buffer:
throttled = acm->throttle;
spin_unlock_irqrestore(&acm->throttle_lock, flags);
if (!throttled) {
- tty_buffer_request_room(tty, buf->size);
tty_insert_flip_string(tty, buf->base, buf->size);
tty_flip_buffer_push(tty);
} else {
@@ -534,23 +537,6 @@ static void acm_softint(struct work_struct *work)
tty_kref_put(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
*/
@@ -566,7 +552,7 @@ static int acm_tty_open(struct tty_struct *tty, struct file *filp)
acm = acm_table[tty->index];
if (!acm || !acm->dev)
- goto err_out;
+ goto out;
else
rv = 0;
@@ -582,8 +568,9 @@ static int acm_tty_open(struct tty_struct *tty, struct file *filp)
mutex_lock(&acm->mutex);
if (acm->port.count++) {
+ mutex_unlock(&acm->mutex);
usb_autopm_put_interface(acm->control);
- goto done;
+ goto out;
}
acm->ctrlurb->dev = acm->dev;
@@ -609,21 +596,21 @@ static int acm_tty_open(struct tty_struct *tty, struct file *filp)
acm->throttle = 0;
- tasklet_schedule(&acm->urb_task);
set_bit(ASYNCB_INITIALIZED, &acm->port.flags);
rv = tty_port_block_til_ready(&acm->port, tty, filp);
-done:
+ tasklet_schedule(&acm->urb_task);
+
mutex_unlock(&acm->mutex);
-err_out:
+out:
mutex_unlock(&open_mutex);
return rv;
full_bailout:
usb_kill_urb(acm->ctrlurb);
bail_out:
- usb_autopm_put_interface(acm->control);
acm->port.count--;
mutex_unlock(&acm->mutex);
+ usb_autopm_put_interface(acm->control);
early_bail:
mutex_unlock(&open_mutex);
tty_port_tty_set(&acm->port, NULL);
@@ -686,15 +673,21 @@ static void acm_tty_close(struct tty_struct *tty, struct file *filp)
/* Perform the closing process and see if we need to do the hardware
shutdown */
- if (!acm || tty_port_close_start(&acm->port, tty, filp) == 0)
+ if (!acm)
return;
+ if (tty_port_close_start(&acm->port, tty, filp) == 0) {
+ mutex_lock(&open_mutex);
+ if (!acm->dev) {
+ tty_port_tty_set(&acm->port, NULL);
+ acm_tty_unregister(acm);
+ tty->driver_data = NULL;
+ }
+ mutex_unlock(&open_mutex);
+ return;
+ }
acm_port_down(acm, 0);
tty_port_close_end(&acm->port, tty);
- mutex_lock(&open_mutex);
tty_port_tty_set(&acm->port, NULL);
- if (!acm->dev)
- acm_tty_unregister(acm);
- mutex_unlock(&open_mutex);
}
static int acm_tty_write(struct tty_struct *tty,
@@ -1017,7 +1010,7 @@ static int acm_probe(struct usb_interface *intf,
case USB_CDC_CALL_MANAGEMENT_TYPE:
call_management_function = buffer[3];
call_interface_num = buffer[4];
- if ((call_management_function & 3) != 3)
+ if ( (quirks & NOT_A_MODEM) == 0 && (call_management_function & 3) != 3)
dev_err(&intf->dev, "This device cannot do calls on its own. It is not a modem.\n");
break;
default:
@@ -1172,7 +1165,6 @@ made_compressed_probe:
acm->urb_task.func = acm_rx_tasklet;
acm->urb_task.data = (unsigned long) acm;
INIT_WORK(&acm->work, acm_softint);
- INIT_WORK(&acm->waker, acm_waker);
init_waitqueue_head(&acm->drain_wait);
spin_lock_init(&acm->throttle_lock);
spin_lock_init(&acm->write_lock);
@@ -1337,7 +1329,6 @@ static void stop_data_traffic(struct acm *acm)
tasklet_enable(&acm->urb_task);
cancel_work_sync(&acm->work);
- cancel_work_sync(&acm->waker);
}
static void acm_disconnect(struct usb_interface *intf)
@@ -1429,6 +1420,7 @@ static int acm_suspend(struct usb_interface *intf, pm_message_t message)
static int acm_resume(struct usb_interface *intf)
{
struct acm *acm = usb_get_intfdata(intf);
+ struct acm_wb *wb;
int rv = 0;
int cnt;
@@ -1443,6 +1435,21 @@ static int acm_resume(struct usb_interface *intf)
mutex_lock(&acm->mutex);
if (acm->port.count) {
rv = usb_submit_urb(acm->ctrlurb, GFP_NOIO);
+
+ spin_lock_irq(&acm->write_lock);
+ if (acm->delayed_wb) {
+ wb = acm->delayed_wb;
+ acm->delayed_wb = NULL;
+ spin_unlock_irq(&acm->write_lock);
+ acm_start_wb(acm, acm->delayed_wb);
+ } else {
+ spin_unlock_irq(&acm->write_lock);
+ }
+
+ /*
+ * delayed error checking because we must
+ * do the write path at all cost
+ */
if (rv < 0)
goto err_out;
@@ -1454,12 +1461,35 @@ err_out:
return rv;
}
+static int acm_reset_resume(struct usb_interface *intf)
+{
+ struct acm *acm = usb_get_intfdata(intf);
+ struct tty_struct *tty;
+
+ mutex_lock(&acm->mutex);
+ if (acm->port.count) {
+ tty = tty_port_tty_get(&acm->port);
+ if (tty) {
+ tty_hangup(tty);
+ tty_kref_put(tty);
+ }
+ }
+ mutex_unlock(&acm->mutex);
+ return acm_resume(intf);
+}
+
#endif /* CONFIG_PM */
+
+#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)
+
/*
* USB driver structure.
*/
-static struct usb_device_id acm_ids[] = {
+static const struct usb_device_id acm_ids[] = {
/* quirky and broken devices */
{ USB_DEVICE(0x0870, 0x0001), /* Metricom GS Modem */
.driver_info = NO_UNION_NORMAL, /* has no union descriptor */
@@ -1513,6 +1543,62 @@ static struct usb_device_id acm_ids[] = {
.driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */
},
+ /* 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 */
+
+ /* NOTE: non-Nokia COMM/ACM/0xff is likely MSFT RNDIS... NOT a modem! */
+
+ /* Support Lego NXT using pbLua firmware */
+ { USB_DEVICE(0x0694, 0xff00),
+ .driver_info = NOT_A_MODEM,
+ },
+
/* control interfaces with various AT-command sets */
{ USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
USB_CDC_ACM_PROTO_AT_V25TER) },
@@ -1527,7 +1613,6 @@ static struct usb_device_id acm_ids[] = {
{ USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
USB_CDC_ACM_PROTO_AT_CDMA) },
- /* NOTE: COMM/ACM/0xff is likely MSFT RNDIS ... NOT a modem!! */
{ }
};
@@ -1540,6 +1625,7 @@ static struct usb_driver acm_driver = {
#ifdef CONFIG_PM
.suspend = acm_suspend,
.resume = acm_resume,
+ .reset_resume = acm_reset_resume,
#endif
.id_table = acm_ids,
#ifdef CONFIG_PM
generated by cgit v1.1 at 2025-06-26 15:57:16 +0000