/*
* Version Information
*/
-#define DRIVER_VERSION "v0.11"
+#define DRIVER_VERSION "v0.12"
#define DRIVER_DESC "Prolific PL2303 USB to serial adaptor driver"
static int debug;
+#define PL2303_CLOSING_WAIT (30*HZ)
+
+#define PL2303_BUF_SIZE 1024
+#define PL2303_TMP_BUF_SIZE 1024
+
+static DECLARE_MUTEX(pl2303_tmp_buf_sem);
+
+struct pl2303_buf {
+ unsigned int buf_size;
+ char *buf_buf;
+ char *buf_get;
+ char *buf_put;
+};
+
static struct usb_device_id id_table [] = {
{ USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID) },
{ USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_RSAQ2) },
+ { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_RSAQ3) },
+ { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_PHAROS) },
{ USB_DEVICE(IODATA_VENDOR_ID, IODATA_PRODUCT_ID) },
{ USB_DEVICE(ATEN_VENDOR_ID, ATEN_PRODUCT_ID) },
{ USB_DEVICE(ATEN_VENDOR_ID2, ATEN_PRODUCT_ID) },
{ USB_DEVICE(ELCOM_VENDOR_ID, ELCOM_PRODUCT_ID) },
+ { USB_DEVICE(ELCOM_VENDOR_ID, ELCOM_PRODUCT_ID_UCSGT) },
{ USB_DEVICE(ITEGNO_VENDOR_ID, ITEGNO_PRODUCT_ID) },
{ USB_DEVICE(MA620_VENDOR_ID, MA620_PRODUCT_ID) },
{ USB_DEVICE(RATOC_VENDOR_ID, RATOC_PRODUCT_ID) },
{ USB_DEVICE(SITECOM_VENDOR_ID, SITECOM_PRODUCT_ID) },
{ USB_DEVICE(ALCATEL_VENDOR_ID, ALCATEL_PRODUCT_ID) },
{ USB_DEVICE(SAMSUNG_VENDOR_ID, SAMSUNG_PRODUCT_ID) },
+ { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_X65) },
{ } /* Terminating entry */
};
static void pl2303_read_int_callback (struct urb *urb, struct pt_regs *regs);
static void pl2303_read_bulk_callback (struct urb *urb, struct pt_regs *regs);
static void pl2303_write_bulk_callback (struct urb *urb, struct pt_regs *regs);
-static int pl2303_write (struct usb_serial_port *port, int from_user,
+static int pl2303_write (struct usb_serial_port *port,
const unsigned char *buf, int count);
+static void pl2303_send (struct usb_serial_port *port);
+static int pl2303_write_room(struct usb_serial_port *port);
+static int pl2303_chars_in_buffer(struct usb_serial_port *port);
static void pl2303_break_ctl(struct usb_serial_port *port,int break_state);
static int pl2303_tiocmget (struct usb_serial_port *port, struct file *file);
static int pl2303_tiocmset (struct usb_serial_port *port, struct file *file,
unsigned int set, unsigned int clear);
static int pl2303_startup (struct usb_serial *serial);
static void pl2303_shutdown (struct usb_serial *serial);
+static struct pl2303_buf *pl2303_buf_alloc(unsigned int size);
+static void pl2303_buf_free(struct pl2303_buf *pb);
+static void pl2303_buf_clear(struct pl2303_buf *pb);
+static unsigned int pl2303_buf_data_avail(struct pl2303_buf *pb);
+static unsigned int pl2303_buf_space_avail(struct pl2303_buf *pb);
+static unsigned int pl2303_buf_put(struct pl2303_buf *pb, const char *buf,
+ unsigned int count);
+static unsigned int pl2303_buf_get(struct pl2303_buf *pb, char *buf,
+ unsigned int count);
/* All of the device info needed for the PL2303 SIO serial converter */
.read_bulk_callback = pl2303_read_bulk_callback,
.read_int_callback = pl2303_read_int_callback,
.write_bulk_callback = pl2303_write_bulk_callback,
+ .write_room = pl2303_write_room,
+ .chars_in_buffer = pl2303_chars_in_buffer,
.attach = pl2303_startup,
.shutdown = pl2303_shutdown,
};
struct pl2303_private {
spinlock_t lock;
+ struct pl2303_buf *buf;
+ int write_urb_in_use;
wait_queue_head_t delta_msr_wait;
u8 line_control;
u8 line_status;
for (i = 0; i < serial->num_ports; ++i) {
priv = kmalloc (sizeof (struct pl2303_private), GFP_KERNEL);
if (!priv)
- return -ENOMEM;
+ goto cleanup;
memset (priv, 0x00, sizeof (struct pl2303_private));
spin_lock_init(&priv->lock);
+ priv->buf = pl2303_buf_alloc(PL2303_BUF_SIZE);
+ if (priv->buf == NULL) {
+ kfree(priv);
+ goto cleanup;
+ }
init_waitqueue_head(&priv->delta_msr_wait);
priv->type = type;
usb_set_serial_port_data(serial->port[i], priv);
}
return 0;
+
+cleanup:
+ for (--i; i>=0; --i) {
+ priv = usb_get_serial_port_data(serial->port[i]);
+ pl2303_buf_free(priv->buf);
+ kfree(priv);
+ usb_set_serial_port_data(serial->port[i], NULL);
+ }
+ return -ENOMEM;
}
static int set_control_lines (struct usb_device *dev, u8 value)
return retval;
}
-static int pl2303_write (struct usb_serial_port *port, int from_user, const unsigned char *buf, int count)
+static int pl2303_write (struct usb_serial_port *port, const unsigned char *buf, int count)
{
- int result;
+ struct pl2303_private *priv = usb_get_serial_port_data(port);
+ unsigned long flags;
dbg("%s - port %d, %d bytes", __FUNCTION__, port->number, count);
if (!count)
return count;
- if (port->write_urb->status == -EINPROGRESS) {
- dbg("%s - already writing", __FUNCTION__);
- return 0;
+ spin_lock_irqsave(&priv->lock, flags);
+ count = pl2303_buf_put(priv->buf, buf, count);
+ spin_unlock_irqrestore(&priv->lock, flags);
+
+ pl2303_send(port);
+
+ return count;
+}
+
+static void pl2303_send(struct usb_serial_port *port)
+{
+ int count, result;
+ struct pl2303_private *priv = usb_get_serial_port_data(port);
+ unsigned long flags;
+
+ dbg("%s - port %d", __FUNCTION__, port->number);
+
+ spin_lock_irqsave(&priv->lock, flags);
+
+ if (priv->write_urb_in_use) {
+ spin_unlock_irqrestore(&priv->lock, flags);
+ return;
}
- count = (count > port->bulk_out_size) ? port->bulk_out_size : count;
- if (from_user) {
- if (copy_from_user (port->write_urb->transfer_buffer, buf, count))
- return -EFAULT;
- } else {
- memcpy (port->write_urb->transfer_buffer, buf, count);
+ count = pl2303_buf_get(priv->buf, port->write_urb->transfer_buffer,
+ port->bulk_out_size);
+
+ if (count == 0) {
+ spin_unlock_irqrestore(&priv->lock, flags);
+ return;
}
-
+
+ priv->write_urb_in_use = 1;
+
+ spin_unlock_irqrestore(&priv->lock, flags);
+
usb_serial_debug_data(debug, &port->dev, __FUNCTION__, count, port->write_urb->transfer_buffer);
port->write_urb->transfer_buffer_length = count;
port->write_urb->dev = port->serial->dev;
result = usb_submit_urb (port->write_urb, GFP_ATOMIC);
- if (result)
+ if (result) {
dev_err(&port->dev, "%s - failed submitting write urb, error %d\n", __FUNCTION__, result);
- else
- result = count;
+ priv->write_urb_in_use = 0;
+ // TODO: reschedule pl2303_send
+ }
- return result;
+ schedule_work(&port->work);
+}
+
+static int pl2303_write_room(struct usb_serial_port *port)
+{
+ struct pl2303_private *priv = usb_get_serial_port_data(port);
+ int room = 0;
+ unsigned long flags;
+
+ dbg("%s - port %d", __FUNCTION__, port->number);
+
+ spin_lock_irqsave(&priv->lock, flags);
+ room = pl2303_buf_space_avail(priv->buf);
+ spin_unlock_irqrestore(&priv->lock, flags);
+
+ dbg("%s - returns %d", __FUNCTION__, room);
+ return room;
}
+static int pl2303_chars_in_buffer(struct usb_serial_port *port)
+{
+ struct pl2303_private *priv = usb_get_serial_port_data(port);
+ int chars = 0;
+ unsigned long flags;
+
+ dbg("%s - port %d", __FUNCTION__, port->number);
+ spin_lock_irqsave(&priv->lock, flags);
+ chars = pl2303_buf_data_avail(priv->buf);
+ spin_unlock_irqrestore(&priv->lock, flags);
+
+ dbg("%s - returns %d", __FUNCTION__, chars);
+ return chars;
+}
static void pl2303_set_termios (struct usb_serial_port *port, struct termios *old_termios)
{
}
kfree (buf);
-}
+}
static int pl2303_open (struct usb_serial_port *port, struct file *filp)
{
FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8383, 0);
SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 0, 1);
SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 1, 0);
-
+
if (priv->type == HX) {
/* HX chip */
SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 2, 0x44);
static void pl2303_close (struct usb_serial_port *port, struct file *filp)
{
- struct pl2303_private *priv;
+ struct pl2303_private *priv = usb_get_serial_port_data(port);
unsigned long flags;
unsigned int c_cflag;
- int result;
+ int bps;
+ long timeout;
+ wait_queue_t wait; \
dbg("%s - port %d", __FUNCTION__, port->number);
- /* shutdown our urbs */
- dbg("%s - shutting down urbs", __FUNCTION__);
- result = usb_unlink_urb (port->write_urb);
- if (result)
- dbg("%s - usb_unlink_urb (write_urb)"
- " failed with reason: %d", __FUNCTION__,
- result);
+ /* wait for data to drain from the buffer */
+ spin_lock_irqsave(&priv->lock, flags);
+ timeout = PL2303_CLOSING_WAIT;
+ init_waitqueue_entry(&wait, current);
+ add_wait_queue(&port->tty->write_wait, &wait);
+ for (;;) {
+ set_current_state(TASK_INTERRUPTIBLE);
+ if (pl2303_buf_data_avail(priv->buf) == 0
+ || timeout == 0 || signal_pending(current)
+ || !usb_get_intfdata(port->serial->interface)) /* disconnect */
+ break;
+ spin_unlock_irqrestore(&priv->lock, flags);
+ timeout = schedule_timeout(timeout);
+ spin_lock_irqsave(&priv->lock, flags);
+ }
+ set_current_state(TASK_RUNNING);
+ remove_wait_queue(&port->tty->write_wait, &wait);
+ /* clear out any remaining data in the buffer */
+ pl2303_buf_clear(priv->buf);
+ spin_unlock_irqrestore(&priv->lock, flags);
- result = usb_unlink_urb (port->read_urb);
- if (result)
- dbg("%s - usb_unlink_urb (read_urb) "
- "failed with reason: %d", __FUNCTION__,
- result);
+ /* wait for characters to drain from the device */
+ /* (this is long enough for the entire 256 byte */
+ /* pl2303 hardware buffer to drain with no flow */
+ /* control for data rates of 1200 bps or more, */
+ /* for lower rates we should really know how much */
+ /* data is in the buffer to compute a delay */
+ /* that is not unnecessarily long) */
+ bps = tty_get_baud_rate(port->tty);
+ if (bps > 1200)
+ timeout = max((HZ*2560)/bps,HZ/10);
+ else
+ timeout = 2*HZ;
+ set_current_state(TASK_INTERRUPTIBLE);
+ schedule_timeout(timeout);
- result = usb_unlink_urb (port->interrupt_in_urb);
- if (result)
- dbg("%s - usb_unlink_urb (interrupt_in_urb)"
- " failed with reason: %d", __FUNCTION__,
- result);
+ /* shutdown our urbs */
+ dbg("%s - shutting down urbs", __FUNCTION__);
+ usb_kill_urb(port->write_urb);
+ usb_kill_urb(port->read_urb);
+ usb_kill_urb(port->interrupt_in_urb);
if (port->tty) {
c_cflag = port->tty->termios->c_cflag;
if (c_cflag & HUPCL) {
/* drop DTR and RTS */
- priv = usb_get_serial_port_data(port);
spin_lock_irqsave(&priv->lock, flags);
priv->line_control = 0;
spin_unlock_irqrestore (&priv->lock, flags);
set_control_lines (port->serial->dev, 0);
}
}
-
}
static int pl2303_tiocmset (struct usb_serial_port *port, struct file *file,
static void pl2303_shutdown (struct usb_serial *serial)
{
int i;
+ struct pl2303_private *priv;
dbg("%s", __FUNCTION__);
for (i = 0; i < serial->num_ports; ++i) {
- kfree (usb_get_serial_port_data(serial->port[i]));
- usb_set_serial_port_data(serial->port[i], NULL);
+ priv = usb_get_serial_port_data(serial->port[i]);
+ if (priv) {
+ pl2303_buf_free(priv->buf);
+ kfree(priv);
+ usb_set_serial_port_data(serial->port[i], NULL);
+ }
}
}
static void pl2303_write_bulk_callback (struct urb *urb, struct pt_regs *regs)
{
struct usb_serial_port *port = (struct usb_serial_port *) urb->context;
+ struct pl2303_private *priv = usb_get_serial_port_data(port);
int result;
dbg("%s - port %d", __FUNCTION__, port->number);
-
- if (urb->status) {
+
+ switch (urb->status) {
+ case 0:
+ /* success */
+ break;
+ case -ECONNRESET:
+ case -ENOENT:
+ case -ESHUTDOWN:
+ /* this urb is terminated, clean up */
+ dbg("%s - urb shutting down with status: %d", __FUNCTION__, urb->status);
+ priv->write_urb_in_use = 0;
+ return;
+ default:
/* error in the urb, so we have to resubmit it */
dbg("%s - Overflow in write", __FUNCTION__);
dbg("%s - nonzero write bulk status received: %d", __FUNCTION__, urb->status);
result = usb_submit_urb (port->write_urb, GFP_ATOMIC);
if (result)
dev_err(&urb->dev->dev, "%s - failed resubmitting write urb, error %d\n", __FUNCTION__, result);
+ else
+ return;
+ }
- return;
+ priv->write_urb_in_use = 0;
+
+ /* send any buffered data */
+ pl2303_send(port);
+}
+
+
+/*
+ * pl2303_buf_alloc
+ *
+ * Allocate a circular buffer and all associated memory.
+ */
+
+static struct pl2303_buf *pl2303_buf_alloc(unsigned int size)
+{
+
+ struct pl2303_buf *pb;
+
+
+ if (size == 0)
+ return NULL;
+
+ pb = (struct pl2303_buf *)kmalloc(sizeof(struct pl2303_buf), GFP_KERNEL);
+ if (pb == NULL)
+ return NULL;
+
+ pb->buf_buf = kmalloc(size, GFP_KERNEL);
+ if (pb->buf_buf == NULL) {
+ kfree(pb);
+ return NULL;
}
- schedule_work(&port->work);
+ pb->buf_size = size;
+ pb->buf_get = pb->buf_put = pb->buf_buf;
+
+ return pb;
+
+}
+
+
+/*
+ * pl2303_buf_free
+ *
+ * Free the buffer and all associated memory.
+ */
+
+static void pl2303_buf_free(struct pl2303_buf *pb)
+{
+ if (pb != NULL) {
+ if (pb->buf_buf != NULL)
+ kfree(pb->buf_buf);
+ kfree(pb);
+ }
+}
+
+
+/*
+ * pl2303_buf_clear
+ *
+ * Clear out all data in the circular buffer.
+ */
+
+static void pl2303_buf_clear(struct pl2303_buf *pb)
+{
+ if (pb != NULL)
+ pb->buf_get = pb->buf_put;
+ /* equivalent to a get of all data available */
+}
+
+
+/*
+ * pl2303_buf_data_avail
+ *
+ * Return the number of bytes of data available in the circular
+ * buffer.
+ */
+
+static unsigned int pl2303_buf_data_avail(struct pl2303_buf *pb)
+{
+ if (pb != NULL)
+ return ((pb->buf_size + pb->buf_put - pb->buf_get) % pb->buf_size);
+ else
+ return 0;
+}
+
+
+/*
+ * pl2303_buf_space_avail
+ *
+ * Return the number of bytes of space available in the circular
+ * buffer.
+ */
+
+static unsigned int pl2303_buf_space_avail(struct pl2303_buf *pb)
+{
+ if (pb != NULL)
+ return ((pb->buf_size + pb->buf_get - pb->buf_put - 1) % pb->buf_size);
+ else
+ return 0;
+}
+
+
+/*
+ * pl2303_buf_put
+ *
+ * Copy data data from a user buffer and put it into the circular buffer.
+ * Restrict to the amount of space available.
+ *
+ * Return the number of bytes copied.
+ */
+
+static unsigned int pl2303_buf_put(struct pl2303_buf *pb, const char *buf,
+ unsigned int count)
+{
+
+ unsigned int len;
+
+
+ if (pb == NULL)
+ return 0;
+
+ len = pl2303_buf_space_avail(pb);
+ if (count > len)
+ count = len;
+
+ if (count == 0)
+ return 0;
+
+ len = pb->buf_buf + pb->buf_size - pb->buf_put;
+ if (count > len) {
+ memcpy(pb->buf_put, buf, len);
+ memcpy(pb->buf_buf, buf+len, count - len);
+ pb->buf_put = pb->buf_buf + count - len;
+ } else {
+ memcpy(pb->buf_put, buf, count);
+ if (count < len)
+ pb->buf_put += count;
+ else /* count == len */
+ pb->buf_put = pb->buf_buf;
+ }
+
+ return count;
+
}
+/*
+ * pl2303_buf_get
+ *
+ * Get data from the circular buffer and copy to the given buffer.
+ * Restrict to the amount of data available.
+ *
+ * Return the number of bytes copied.
+ */
+
+static unsigned int pl2303_buf_get(struct pl2303_buf *pb, char *buf,
+ unsigned int count)
+{
+
+ unsigned int len;
+
+
+ if (pb == NULL)
+ return 0;
+
+ len = pl2303_buf_data_avail(pb);
+ if (count > len)
+ count = len;
+
+ if (count == 0)
+ return 0;
+
+ len = pb->buf_buf + pb->buf_size - pb->buf_get;
+ if (count > len) {
+ memcpy(buf, pb->buf_get, len);
+ memcpy(buf+len, pb->buf_buf, count - len);
+ pb->buf_get = pb->buf_buf + count - len;
+ } else {
+ memcpy(buf, pb->buf_get, count);
+ if (count < len)
+ pb->buf_get += count;
+ else /* count == len */
+ pb->buf_get = pb->buf_buf;
+ }
+
+ return count;
+
+}
+
static int __init pl2303_init (void)
{
int retval;
module_exit(pl2303_exit);
MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_VERSION(DRIVER_VERSION);
MODULE_LICENSE("GPL");
module_param(debug, bool, S_IRUGO | S_IWUSR);
git://git.onelab.eu / linux-2.6.git / blobdiff