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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.c214
1 files changed, 126 insertions, 88 deletions
diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c
index 56d6bf668488..3e7560f004f8 100644
--- a/drivers/usb/class/cdc-acm.c
+++ b/drivers/usb/class/cdc-acm.c
@@ -39,7 +39,6 @@
#include <linux/serial.h>
#include <linux/tty_driver.h>
#include <linux/tty_flip.h>
-#include <linux/serial.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/uaccess.h>
@@ -217,38 +216,6 @@ static int acm_start_wb(struct acm *acm, struct acm_wb *wb)
return rc;
}
-static int acm_write_start(struct acm *acm, int wbn)
-{
- unsigned long flags;
- struct acm_wb *wb = &acm->wb[wbn];
- int rc;
-
- spin_lock_irqsave(&acm->write_lock, flags);
- if (!acm->dev) {
- wb->use = 0;
- spin_unlock_irqrestore(&acm->write_lock, flags);
- return -ENODEV;
- }
-
- dev_vdbg(&acm->data->dev, "%s - susp_count %d\n", __func__,
- acm->susp_count);
- usb_autopm_get_interface_async(acm->control);
- if (acm->susp_count) {
- 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 */
- }
- usb_mark_last_busy(acm->dev);
-
- rc = acm_start_wb(acm, wb);
- spin_unlock_irqrestore(&acm->write_lock, flags);
-
- return rc;
-
-}
/*
* attributes exported through sysfs
*/
@@ -293,7 +260,6 @@ static void acm_ctrl_irq(struct urb *urb)
{
struct acm *acm = urb->context;
struct usb_cdc_notification *dr = urb->transfer_buffer;
- struct tty_struct *tty;
unsigned char *data;
int newctrl;
int retval;
@@ -328,17 +294,12 @@ static void acm_ctrl_irq(struct urb *urb)
break;
case USB_CDC_NOTIFY_SERIAL_STATE:
- tty = tty_port_tty_get(&acm->port);
newctrl = get_unaligned_le16(data);
- if (tty) {
- if (!acm->clocal &&
- (acm->ctrlin & ~newctrl & ACM_CTRL_DCD)) {
- dev_dbg(&acm->control->dev,
- "%s - calling hangup\n", __func__);
- tty_hangup(tty);
- }
- tty_kref_put(tty);
+ 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);
}
acm->ctrlin = newctrl;
@@ -411,19 +372,12 @@ static int acm_submit_read_urbs(struct acm *acm, gfp_t mem_flags)
static void acm_process_read_urb(struct acm *acm, struct urb *urb)
{
- struct tty_struct *tty;
-
if (!urb->actual_length)
return;
- tty = tty_port_tty_get(&acm->port);
- if (!tty)
- return;
-
- tty_insert_flip_string(tty, urb->transfer_buffer, urb->actual_length);
- tty_flip_buffer_push(tty);
-
- tty_kref_put(tty);
+ 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)
@@ -483,15 +437,10 @@ static void acm_write_bulk(struct urb *urb)
static void acm_softint(struct work_struct *work)
{
struct acm *acm = container_of(work, struct acm, work);
- struct tty_struct *tty;
dev_vdbg(&acm->data->dev, "%s\n", __func__);
- tty = tty_port_tty_get(&acm->port);
- if (!tty)
- return;
- tty_wakeup(tty);
- tty_kref_put(tty);
+ tty_port_tty_wakeup(&acm->port);
}
/*
@@ -601,7 +550,6 @@ static void acm_port_destruct(struct tty_port *port)
dev_dbg(&acm->control->dev, "%s\n", __func__);
- tty_unregister_device(acm_tty_driver, acm->minor);
acm_release_minor(acm);
usb_put_intf(acm->control);
kfree(acm->country_codes);
@@ -673,13 +621,31 @@ static int acm_tty_write(struct tty_struct *tty,
}
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, "%s - write %d\n", __func__, count);
memcpy(wb->buf, buf, count);
wb->len = count;
+
+ usb_autopm_get_interface_async(acm->control);
+ if (acm->susp_count) {
+ if (!acm->delayed_wb)
+ acm->delayed_wb = wb;
+ else
+ usb_autopm_put_interface_async(acm->control);
+ spin_unlock_irqrestore(&acm->write_lock, flags);
+ return count; /* A white lie */
+ }
+ usb_mark_last_busy(acm->dev);
+
+ stat = acm_start_wb(acm, wb);
spin_unlock_irqrestore(&acm->write_lock, flags);
- stat = acm_write_start(acm, wbn);
if (stat < 0)
return stat;
return count;
@@ -788,6 +754,10 @@ static int get_serial_info(struct acm *acm, struct serial_struct __user *info)
tmp.flags = ASYNC_LOW_LATENCY;
tmp.xmit_fifo_size = acm->writesize;
tmp.baud_base = le32_to_cpu(acm->line.dwDTERate);
+ tmp.close_delay = acm->port.close_delay / 10;
+ tmp.closing_wait = acm->port.closing_wait == ASYNC_CLOSING_WAIT_NONE ?
+ ASYNC_CLOSING_WAIT_NONE :
+ acm->port.closing_wait / 10;
if (copy_to_user(info, &tmp, sizeof(tmp)))
return -EFAULT;
@@ -795,6 +765,37 @@ static int get_serial_info(struct acm *acm, struct serial_struct __user *info)
return 0;
}
+static int set_serial_info(struct acm *acm,
+ struct serial_struct __user *newinfo)
+{
+ struct serial_struct new_serial;
+ unsigned int closing_wait, close_delay;
+ int retval = 0;
+
+ if (copy_from_user(&new_serial, newinfo, sizeof(new_serial)))
+ return -EFAULT;
+
+ close_delay = new_serial.close_delay * 10;
+ closing_wait = new_serial.closing_wait == ASYNC_CLOSING_WAIT_NONE ?
+ ASYNC_CLOSING_WAIT_NONE : new_serial.closing_wait * 10;
+
+ mutex_lock(&acm->port.mutex);
+
+ if (!capable(CAP_SYS_ADMIN)) {
+ if ((close_delay != acm->port.close_delay) ||
+ (closing_wait != acm->port.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 acm_tty_ioctl(struct tty_struct *tty,
unsigned int cmd, unsigned long arg)
{
@@ -805,28 +806,19 @@ static int acm_tty_ioctl(struct tty_struct *tty,
case TIOCGSERIAL: /* gets serial port data */
rv = get_serial_info(acm, (struct serial_struct __user *) arg);
break;
+ case TIOCSSERIAL:
+ rv = set_serial_info(acm, (struct serial_struct __user *) arg);
+ break;
}
return rv;
}
-static const __u32 acm_tty_speed[] = {
- 0, 50, 75, 110, 134, 150, 200, 300, 600,
- 1200, 1800, 2400, 4800, 9600, 19200, 38400,
- 57600, 115200, 230400, 460800, 500000, 576000,
- 921600, 1000000, 1152000, 1500000, 2000000,
- 2500000, 3000000, 3500000, 4000000
-};
-
-static const __u8 acm_tty_size[] = {
- 5, 6, 7, 8
-};
-
static void acm_tty_set_termios(struct tty_struct *tty,
struct ktermios *termios_old)
{
struct acm *acm = tty->driver_data;
- struct ktermios *termios = tty->termios;
+ struct ktermios *termios = &tty->termios;
struct usb_cdc_line_coding newline;
int newctrl = acm->ctrlout;
@@ -835,7 +827,21 @@ static void acm_tty_set_termios(struct tty_struct *tty,
newline.bParityType = termios->c_cflag & PARENB ?
(termios->c_cflag & PARODD ? 1 : 2) +
(termios->c_cflag & CMSPAR ? 2 : 0) : 0;
- newline.bDataBits = acm_tty_size[(termios->c_cflag & CSIZE) >> 4];
+ 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);
@@ -937,9 +943,15 @@ static int acm_probe(struct usb_interface *intf,
int num_rx_buf;
int i;
int combined_interfaces = 0;
+ struct device *tty_dev;
+ int rv = -ENOMEM;
/* normal quirks */
quirks = (unsigned long)id->driver_info;
+
+ if (quirks == IGNORE_DEVICE)
+ return -ENODEV;
+
num_rx_buf = (quirks == SINGLE_RX_URB) ? 1 : ACM_NR;
/* handle quirks deadly to normal probing*/
@@ -1104,7 +1116,8 @@ skip_normal_probe:
}
- if (data_interface->cur_altsetting->desc.bNumEndpoints < 2)
+ 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;
@@ -1233,7 +1246,7 @@ made_compressed_probe:
if (usb_endpoint_xfer_int(epwrite))
usb_fill_int_urb(snd->urb, usb_dev,
- usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress),
+ usb_sndintpipe(usb_dev, epwrite->bEndpointAddress),
NULL, acm->writesize, acm_write_bulk, snd, epwrite->bInterval);
else
usb_fill_bulk_urb(snd->urb, usb_dev,
@@ -1282,7 +1295,7 @@ skip_countries:
usb_rcvintpipe(usb_dev, epctrl->bEndpointAddress),
acm->ctrl_buffer, ctrlsize, acm_ctrl_irq, acm,
/* works around buggy devices */
- epctrl->bInterval ? epctrl->bInterval : 0xff);
+ epctrl->bInterval ? epctrl->bInterval : 16);
acm->ctrlurb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
acm->ctrlurb->transfer_dma = acm->ctrl_dma;
@@ -1298,10 +1311,24 @@ skip_countries:
usb_set_intfdata(data_interface, acm);
usb_get_intf(control_interface);
- tty_register_device(acm_tty_driver, minor, &control_interface->dev);
+ 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_fail8;
+ }
return 0;
+alloc_fail8:
+ 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);
alloc_fail7:
+ usb_set_intfdata(intf, NULL);
for (i = 0; i < ACM_NW; i++)
usb_free_urb(acm->wb[i].urb);
alloc_fail6:
@@ -1317,7 +1344,7 @@ alloc_fail2:
acm_release_minor(acm);
kfree(acm);
alloc_fail:
- return -ENOMEM;
+ return rv;
}
static void stop_data_traffic(struct acm *acm)
@@ -1369,6 +1396,8 @@ static void acm_disconnect(struct usb_interface *intf)
stop_data_traffic(acm);
+ 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);
@@ -1461,15 +1490,9 @@ err_out:
static int acm_reset_resume(struct usb_interface *intf)
{
struct acm *acm = usb_get_intfdata(intf);
- struct tty_struct *tty;
- if (test_bit(ASYNCB_INITIALIZED, &acm->port.flags)) {
- tty = tty_port_tty_get(&acm->port);
- if (tty) {
- tty_hangup(tty);
- tty_kref_put(tty);
- }
- }
+ if (test_bit(ASYNCB_INITIALIZED, &acm->port.flags))
+ tty_port_tty_hangup(&acm->port, false);
return acm_resume(intf);
}
@@ -1550,6 +1573,12 @@ static const struct usb_device_id acm_ids[] = {
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 */
},
@@ -1636,6 +1665,15 @@ static const struct usb_device_id acm_ids[] = {
.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
+
/* control interfaces without any protocol set */
{ USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
USB_CDC_PROTO_NONE) },
generated by cgit (git 2.34.1) at 2025-08-13 02:48:05 +0000