[PATCH] Option Card driver update, Maintainer entry
Matthias Urlichs [Thu, 14 Jul 2005 07:33:47 +0000 (00:33 -0700)]
This patch updates the Option Card driver:
- remove a deadlock
- add sponsor notice
- add new card
- renamed the device to what's usually printed on it
- removed some dead code
- clean up a bunch of irregular whitespace (end-of-line, tabs)

Also add a MAINTAINERS entry for the Option Card driver.

Signed-Off-By: Matthias Urlichs <smurf@smurf.noris.de>
Cc: Greg KH <greg@kroah.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

MAINTAINERS
drivers/usb/serial/option.c

index 5d01472..f73381a 100644 (file)
@@ -2420,6 +2420,12 @@ L:       linux-usb-users@lists.sourceforge.net
 L:     linux-usb-devel@lists.sourceforge.net
 S:     Maintained
 
+USB OPTION-CARD DRIVER
+P:     Matthias Urlichs
+M:     smurf@smurf.noris.de
+L:     linux-usb-devel@lists.sourceforge.net
+S:     Maintained
+
 USB OV511 DRIVER
 P:     Mark McClelland
 M:     mmcclell@bigfoot.com
index b722175..e925640 100644 (file)
   History:
 
   2005-05-19  v0.1   Initial version, based on incomplete docs
-                     and analysis of misbehavior of the standard driver
+                     and analysis of misbehavior with the standard driver
   2005-05-20  v0.2   Extended the input buffer to avoid losing
                      random 64-byte chunks of data
   2005-05-21  v0.3   implemented chars_in_buffer()
                      turned on low_latency
                      simplified the code somewhat
+  2005-05-24  v0.4   option_write() sometimes deadlocked under heavy load
+                     removed some dead code
+                     added sponsor notice
+                     coding style clean-up
+  2005-06-20  v0.4.1 add missing braces :-/
+                     killed end-of-line whitespace
+  2005-07-15  v0.4.2 rename WLAN product to FUSION, add FUSION2
+
+  Work sponsored by: Sigos GmbH, Germany <info@sigos.de>
+
 */
-#define DRIVER_VERSION "v0.3"
+
+#define DRIVER_VERSION "v0.4"
 #define DRIVER_AUTHOR "Matthias Urlichs <smurf@smurf.noris.de>"
 #define DRIVER_DESC "Option Card (PC-Card to) USB to Serial Driver"
 
@@ -44,7 +55,6 @@ static int  option_write_room (struct usb_serial_port *port);
 
 static void option_instat_callback(struct urb *urb, struct pt_regs *regs);
 
-
 static int  option_write (struct usb_serial_port *port,
                           const unsigned char *buf, int count);
 
@@ -60,14 +70,17 @@ static int  option_tiocmset (struct usb_serial_port *port, struct file *file,
 static int  option_send_setup (struct usb_serial_port *port);
 
 /* Vendor and product IDs */
-#define OPTION_VENDOR_ID               0x0AF0
+#define OPTION_VENDOR_ID                       0x0AF0
+
+#define OPTION_PRODUCT_OLD             0x5000
+#define OPTION_PRODUCT_FUSION  0x6000
+#define OPTION_PRODUCT_FUSION2 0x6300
 
-#define        OPTION_PRODUCT_OLD              0x5000
-#define        OPTION_PRODUCT_WLAN             0x6000
 
 static struct usb_device_id option_ids[] = {
        { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_OLD) },
-       { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_WLAN) },
+       { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_FUSION) },
+       { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_FUSION2) },
        { } /* Terminating entry */
 };
 
@@ -85,58 +98,62 @@ static struct usb_driver option_driver = {
  * recognizes separately, thus num_port=1.
  */
 static struct usb_serial_device_type option_3port_device = {
-       .owner                  = THIS_MODULE,
-       .name                   = "Option 3-port card",
-       .short_name             = "option",
-       .id_table               = option_ids,
-       .num_interrupt_in       = NUM_DONT_CARE,
-       .num_bulk_in            = NUM_DONT_CARE,
-       .num_bulk_out           = NUM_DONT_CARE,
-       .num_ports              = 1, /* 3 */
-       .open                   = option_open,
-       .close                  = option_close,
-       .write                  = option_write,
-       .write_room             = option_write_room,
-       .chars_in_buffer        = option_chars_in_buffer,
-       .throttle               = option_rx_throttle,
-       .unthrottle             = option_rx_unthrottle,
-       .ioctl                  = option_ioctl,
-       .set_termios            = option_set_termios,
-       .break_ctl              = option_break_ctl,
-       .tiocmget               = option_tiocmget,
-       .tiocmset               = option_tiocmset,
-       .attach                 = option_startup,
-       .shutdown               = option_shutdown,
-       .read_int_callback      = option_instat_callback,
+       .owner             = THIS_MODULE,
+       .name              = "Option 3G data card",
+       .short_name        = "option",
+       .id_table          = option_ids,
+       .num_interrupt_in  = NUM_DONT_CARE,
+       .num_bulk_in       = NUM_DONT_CARE,
+       .num_bulk_out      = NUM_DONT_CARE,
+       .num_ports         = 1, /* 3, but the card reports its ports separately */
+       .open              = option_open,
+       .close             = option_close,
+       .write             = option_write,
+       .write_room        = option_write_room,
+       .chars_in_buffer   = option_chars_in_buffer,
+       .throttle          = option_rx_throttle,
+       .unthrottle        = option_rx_unthrottle,
+       .ioctl             = option_ioctl,
+       .set_termios       = option_set_termios,
+       .break_ctl         = option_break_ctl,
+       .tiocmget          = option_tiocmget,
+       .tiocmset          = option_tiocmset,
+       .attach            = option_startup,
+       .shutdown          = option_shutdown,
+       .read_int_callback = option_instat_callback,
 };
 
+#ifdef CONFIG_USB_DEBUG
 static int debug;
+#else
+#define debug 0
+#endif
+
 
 /* per port private data */
 
-#define N_IN_URB       4
-#define N_OUT_URB      1
-#define IN_BUFLEN      1024
-#define OUT_BUFLEN     1024
+#define N_IN_URB 4
+#define N_OUT_URB 1
+#define IN_BUFLEN 1024
+#define OUT_BUFLEN 128
 
 struct option_port_private {
        /* Input endpoints and buffer for this port */
-       struct urb      *in_urbs[N_IN_URB];
-       char            in_buffer[N_IN_URB][IN_BUFLEN];
+       struct urb *in_urbs[N_IN_URB];
+       char in_buffer[N_IN_URB][IN_BUFLEN];
        /* Output endpoints and buffer for this port */
-       struct urb      *out_urbs[N_OUT_URB];
-       char            out_buffer[N_OUT_URB][OUT_BUFLEN];
+       struct urb *out_urbs[N_OUT_URB];
+       char out_buffer[N_OUT_URB][OUT_BUFLEN];
 
        /* Settings for the port */
-       int             rts_state;      /* Handshaking pins (outputs) */
-       int             dtr_state;
-       int             cts_state;      /* Handshaking pins (inputs) */
-       int             dsr_state;
-       int             dcd_state;
-       int             ri_state;
-       // int          break_on;
-
-       unsigned long   tx_start_time[N_OUT_URB];
+       int rts_state;  /* Handshaking pins (outputs) */
+       int dtr_state;
+       int cts_state;  /* Handshaking pins (inputs) */
+       int dsr_state;
+       int dcd_state;
+       int ri_state;
+
+       unsigned long tx_start_time[N_OUT_URB];
 };
 
 
@@ -190,13 +207,13 @@ static void
 option_break_ctl (struct usb_serial_port *port, int break_state)
 {
        /* Unfortunately, I don't know how to send a break */
-       dbg("%s", __FUNCTION__);
+       dbg("%s", __FUNCTION__);
 }
 
 
 static void
 option_set_termios (struct usb_serial_port *port,
-                                    struct termios *old_termios)
+                    struct termios *old_termios)
 {
        dbg("%s", __FUNCTION__);
 
@@ -204,10 +221,10 @@ option_set_termios (struct usb_serial_port *port,
 }
 
 static int
-option_tiocmget(struct usb_serial_port *port, struct file *file)
+option_tiocmget (struct usb_serial_port *port, struct file *file)
 {
-       unsigned int                    value;
-       struct option_port_private      *portdata;
+       unsigned int value;
+       struct option_port_private *portdata;
 
        portdata = usb_get_serial_port_data(port);
 
@@ -225,7 +242,7 @@ static int
 option_tiocmset (struct usb_serial_port *port, struct file *file,
                  unsigned int set, unsigned int clear)
 {
-       struct option_port_private      *portdata;
+       struct option_port_private *portdata;
 
        portdata = usb_get_serial_port_data(port);
 
@@ -250,71 +267,50 @@ option_ioctl (struct usb_serial_port *port, struct file *file,
 
 /* Write */
 static int
-option_write(struct usb_serial_port *port,
-                        const unsigned char *buf, int count)
+option_write (struct usb_serial_port *port,
+                         const unsigned char *buf, int count)
 {
-       struct option_port_private      *portdata;
-       int                             i;
-       int                             left, todo;
-       struct urb                      *this_urb = NULL; /* spurious */
-       int                             err;
+       struct option_port_private *portdata;
+       int i;
+       int left, todo;
+       struct urb *this_urb = NULL; /* spurious */
+       int err;
 
        portdata = usb_get_serial_port_data(port);
 
        dbg("%s: write (%d chars)", __FUNCTION__, count);
 
-#if 0
-       spin_lock(&port->lock);
-       if (port->write_urb_busy) {
-               spin_unlock(&port->lock);
-               dbg("%s: already writing", __FUNCTION__);
-               return 0;
-       }
-       port->write_urb_busy = 1;
-       spin_unlock(&port->lock);
-#endif
-
        i = 0;
        left = count;
-       while (left>0) {
+       for (i=0; left > 0 && i < N_OUT_URB; i++) {
                todo = left;
                if (todo > OUT_BUFLEN)
                        todo = OUT_BUFLEN;
 
-               for (;i < N_OUT_URB; i++) {
-                       /* Check we have a valid urb/endpoint before we use it... */
-                       this_urb = portdata->out_urbs[i];
-                       if (this_urb->status != -EINPROGRESS)
-                               break;
+               this_urb = portdata->out_urbs[i];
+               if (this_urb->status == -EINPROGRESS) {
                        if (this_urb->transfer_flags & URB_ASYNC_UNLINK)
                                continue;
                        if (time_before(jiffies, portdata->tx_start_time[i] + 10 * HZ))
                                continue;
                        this_urb->transfer_flags |= URB_ASYNC_UNLINK;
                        usb_unlink_urb(this_urb);
+                       continue;
                }
-
-               if (i == N_OUT_URB) {
-                       /* no bulk out free! */
-                       dbg("%s: no output urb -- left %d", __FUNCTION__,count-left);
-#if 0
-                       port->write_urb_busy = 0;
-#endif
-                       return count-left;
-               }
+               if (this_urb->status != 0)
+                       dbg("usb_write %p failed (err=%d)", this_urb, this_urb->status);
 
                dbg("%s: endpoint %d buf %d", __FUNCTION__, usb_pipeendpoint(this_urb->pipe), i);
 
+               /* send the data */
                memcpy (this_urb->transfer_buffer, buf, todo);
-
-               /* send the data out the bulk port */
                this_urb->transfer_buffer_length = todo;
 
                this_urb->transfer_flags &= ~URB_ASYNC_UNLINK;
                this_urb->dev = port->serial->dev;
                err = usb_submit_urb(this_urb, GFP_ATOMIC);
                if (err) {
-                       dbg("usb_submit_urb %p (write bulk) failed (%d,, has %d)", this_urb, err, this_urb->status);
+                       dbg("usb_submit_urb %p (write bulk) failed (%d, has %d)", this_urb, err, this_urb->status);
                        continue;
                }
                portdata->tx_start_time[i] = jiffies;
@@ -323,9 +319,6 @@ option_write(struct usb_serial_port *port,
        }
 
        count -= left;
-#if 0
-       port->write_urb_busy = 0;
-#endif
        dbg("%s: wrote (did %d)", __FUNCTION__, count);
        return count;
 }
@@ -333,7 +326,7 @@ option_write(struct usb_serial_port *port,
 static void
 option_indat_callback (struct urb *urb, struct pt_regs *regs)
 {
-       int     i, err;
+       int i, err;
        int endpoint;
        struct usb_serial_port *port;
        struct tty_struct *tty;
@@ -444,10 +437,11 @@ option_write_room (struct usb_serial_port *port)
 
        portdata = usb_get_serial_port_data(port);
 
-       for (i=0; i < N_OUT_URB; i++)
+       for (i=0; i < N_OUT_URB; i++) {
                this_urb = portdata->out_urbs[i];
                if (this_urb && this_urb->status != -EINPROGRESS)
                        data_len += OUT_BUFLEN;
+       }
 
        dbg("%s: %d", __FUNCTION__, data_len);
        return data_len;
@@ -464,11 +458,11 @@ option_chars_in_buffer (struct usb_serial_port *port)
 
        portdata = usb_get_serial_port_data(port);
 
-       for (i=0; i < N_OUT_URB; i++)
+       for (i=0; i < N_OUT_URB; i++) {
                this_urb = portdata->out_urbs[i];
                if (this_urb && this_urb->status == -EINPROGRESS)
                        data_len += this_urb->transfer_buffer_length;
-
+       }
        dbg("%s: %d", __FUNCTION__, data_len);
        return data_len;
 }
@@ -477,10 +471,10 @@ option_chars_in_buffer (struct usb_serial_port *port)
 static int
 option_open (struct usb_serial_port *port, struct file *filp)
 {
-       struct option_port_private      *portdata;
-       struct usb_serial               *serial = port->serial;
-       int                             i, err;
-       struct urb                      *urb;
+       struct option_port_private *portdata;
+       struct usb_serial *serial = port->serial;
+       int i, err;
+       struct urb *urb;
 
        portdata = usb_get_serial_port_data(port);
 
@@ -528,7 +522,7 @@ option_open (struct usb_serial_port *port, struct file *filp)
 }
 
 static inline void
-stop_urb(struct urb *urb)
+stop_urb (struct urb *urb)
 {
        if (urb && urb->status == -EINPROGRESS) {
                urb->transfer_flags &= ~URB_ASYNC_UNLINK;
@@ -537,11 +531,11 @@ stop_urb(struct urb *urb)
 }
 
 static void
-option_close(struct usb_serial_port *port, struct file *filp)
+option_close (struct usb_serial_port *port, struct file *filp)
 {
-       int                     i;
-       struct usb_serial       *serial = port->serial;
-       struct option_port_private      *portdata;
+       int i;
+       struct usb_serial *serial = port->serial;
+       struct option_port_private *portdata;
 
        dbg("%s", __FUNCTION__);
        portdata = usb_get_serial_port_data(port);
@@ -589,11 +583,11 @@ option_setup_urb (struct usb_serial *serial, int endpoint,
 
 /* Setup urbs */
 static void
-option_setup_urbs(struct usb_serial *serial)
+option_setup_urbs (struct usb_serial *serial)
 {
-       int                             j;
-       struct usb_serial_port          *port;
-       struct option_port_private      *portdata;
+       int j;
+       struct usb_serial_port *port;
+       struct option_port_private *portdata;
 
        dbg("%s", __FUNCTION__);
 
@@ -617,7 +611,7 @@ option_setup_urbs(struct usb_serial *serial)
 
 
 static int
-option_send_setup(struct usb_serial_port *port)
+option_send_setup (struct usb_serial_port *port)
 {
        struct usb_serial *serial = port->serial;
        struct option_port_private *portdata;
@@ -644,9 +638,9 @@ option_send_setup(struct usb_serial_port *port)
 static int
 option_startup (struct usb_serial *serial)
 {
-       int                             i, err;
-       struct usb_serial_port          *port;
-       struct option_port_private      *portdata;
+       int i, err;
+       struct usb_serial_port *port;
+       struct option_port_private *portdata;
 
        dbg("%s", __FUNCTION__);
 
@@ -677,9 +671,9 @@ option_startup (struct usb_serial *serial)
 static void
 option_shutdown (struct usb_serial *serial)
 {
-       int                             i, j;
-       struct usb_serial_port          *port;
-       struct option_port_private      *portdata;
+       int i, j;
+       struct usb_serial_port *port;
+       struct option_port_private *portdata;
 
        dbg("%s", __FUNCTION__);
 
@@ -724,6 +718,8 @@ MODULE_DESCRIPTION(DRIVER_DESC);
 MODULE_VERSION(DRIVER_VERSION);
 MODULE_LICENSE("GPL");
 
+#ifdef CONFIG_USB_DEBUG
 module_param(debug, bool, S_IRUGO | S_IWUSR);
 MODULE_PARM_DESC(debug, "Debug messages");
+#endif