[PATCH] USB: usb-net: new device ID passed through module parameter

adds new module parameter "devid" that points to a string with format
"device_name:vendor_id:device_id:flags".  if provided at module load
time, this string is being parsed and a new entry is created in
usb_dev_id[] and pegasus_ids[] so the new device can later be recognized
by the probe routine.  this might be helpful for someone who don't
know/wish to build new module/kernel, but want to use his new usb-to-eth
device that is not yet listed in pegasus.h

Signed-off-by:	Petko Manolov <petkan@nucleusys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 38 insertions, 0 deletions

diff --git a/drivers/usb/net/pegasus.c b/drivers/usb/net/pegasus.c
index d8c7adabf201..156a2f1cb39a 100644
--- a/drivers/usb/net/pegasus.c
+++ b/drivers/usb/net/pegasus.c
@@ -57,12 +57,14 @@ static const char driver_name[] = "pegasus";
 
 static int loopback = 0;
 static int mii_mode = 0;
+static char *devid=NULL;
 
 static struct usb_eth_dev usb_dev_id[] = {
 #define PEGASUS_DEV(pn, vid, pid, flags)        \
         {.name = pn, .vendor = vid, .device = pid, .private = flags},
 #include "pegasus.h"
 #undef  PEGASUS_DEV
+        {NULL, 0, 0, 0},
         {NULL, 0, 0, 0}
 };
 
@@ -71,6 +73,7 @@ static struct usb_device_id pegasus_ids[] = {
         {.match_flags = USB_DEVICE_ID_MATCH_DEVICE, .idVendor = vid, .idProduct = pid},
 #include "pegasus.h"
 #undef  PEGASUS_DEV
+        {},
         {}
 };
 
@@ -79,8 +82,10 @@ MODULE_DESCRIPTION(DRIVER_DESC);
 MODULE_LICENSE("GPL");
 module_param(loopback, bool, 0);
 module_param(mii_mode, bool, 0);
+module_param(devid, charp, 0);
 MODULE_PARM_DESC(loopback, "Enable MAC loopback mode (bit 0)");
 MODULE_PARM_DESC(mii_mode, "Enable HomePNA mode (bit 0),default=MII mode = 0");
+MODULE_PARM_DESC(devid, "The format is: 'DEV_name:VendorID:DeviceID:Flags'");
 
 /* use ethtool to change the level for any given device */
 static int msg_level = -1;
@@ -1410,9 +1415,42 @@ static struct usb_driver pegasus_driver = {
         .resume = pegasus_resume,
 };
 
+static void parse_id(char *id)
+{
+        unsigned int vendor_id=0, device_id=0, flags=0, i=0;
+        char *token, *name=NULL;
+
+        if ((token = strsep(&id, ":")) != NULL)
+                name = token;
+        /* name now points to a null terminated string*/
+        if ((token = strsep(&id, ":")) != NULL)
+                vendor_id = simple_strtoul(token, NULL, 16);
+        if ((token = strsep(&id, ":")) != NULL)
+                device_id = simple_strtoul(token, NULL, 16);
+        flags = simple_strtoul(id, NULL, 16);
+        pr_info("%s: new device %s, vendor ID 0x%04x, device ID 0x%04x, flags: 0x%x\n",
+                driver_name, name, vendor_id, device_id, flags);
+
+        if (vendor_id > 0x10000 || vendor_id == 0)
+                return;
+        if (device_id > 0x10000 || device_id == 0)
+                return;
+
+        for (i=0; usb_dev_id[i].name; i++);
+        usb_dev_id[i].name = name;
+        usb_dev_id[i].vendor = vendor_id;
+        usb_dev_id[i].device = device_id;
+        usb_dev_id[i].private = flags;
+        pegasus_ids[i].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
+        pegasus_ids[i].idVendor = vendor_id;
+        pegasus_ids[i].idProduct = device_id;
+}
+
 static int __init pegasus_init(void)
 {
         pr_info("%s: %s, " DRIVER_DESC "\n", driver_name, DRIVER_VERSION);
+        if (devid)
+                parse_id(devid);
         pegasus_workqueue = create_singlethread_workqueue("pegasus");
         if (!pegasus_workqueue)
                 return -ENOMEM;