[IRDA]: Support for Sigmatel STIR421x chip

This patch enables support for the Sigmatel's STIR421x IrDA chip.
Once patched with Sigmatel's firmware, this chip "almost" follows the
USB-IrDA spec. Thus this patch is against irda-usb.[ch].

The code has been tested by Nick Fedchik on an STIR4210 chipset based
dongle.
Signed-off-by: Samuel Ortiz <samuel.ortiz@nokia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/irda/irda-usb.h

 /*****************************************************************************
  *
  * Filename:      irda-usb.h
- * Version:       0.9b
+ * Version:       0.10
  * Description:   IrDA-USB Driver
  * Status:        Experimental 
  * Author:        Dag Brattli <dag@brattli.net>
@@ -9,6 +9,9 @@
  *	Copyright (C) 2001, Roman Weissgaerber <weissg@vienna.at>
  *      Copyright (C) 2000, Dag Brattli <dag@brattli.net>
  *      Copyright (C) 2001, Jean Tourrilhes <jt@hpl.hp.com>
+ *      Copyright (C) 2004, SigmaTel, Inc. <irquality@sigmatel.com>
+ *      Copyright (C) 2005, Milan Beno <beno@pobox.sk>
+ *      Copyright (C) 2006, Nick FEdchik <nick@fedchik.org.ua>
  *          
  *	This program is free software; you can redistribute it and/or modify
  *	it under the terms of the GNU General Public License as published by
@@ -31,6 +34,9 @@
 #include <net/irda/irda.h>
 #include <net/irda/irda_device.h>      /* struct irlap_cb */
 
+#define PATCH_FILE_SIZE_MAX     65536
+#define PATCH_FILE_SIZE_MIN     80
+
 #define RX_COPY_THRESHOLD 200
 #define IRDA_USB_MAX_MTU 2051
 #define IRDA_USB_SPEED_MTU 64		/* Weird, but work like this */
@@ -88,6 +94,7 @@
 #define SPEED_576000   0x07
 #define SPEED_1152000  0x08
 #define SPEED_4000000  0x09
+#define SPEED_16000000 0x0a
 
 /* Basic capabilities */
 #define IUC_DEFAULT	0x00	/* Basic device compliant with 1.0 spec */
@@ -100,11 +107,14 @@
 #define IUC_SMALL_PKT	0x10	/* Device doesn't behave with big Rx packets */
 #define IUC_MAX_WINDOW	0x20	/* Device underestimate the Rx window */
 #define IUC_MAX_XBOFS	0x40	/* Device need more xbofs than advertised */
+#define IUC_STIR_4210	0x80	/* SigmaTel 4210/4220/4116 VFIR */
 
 /* USB class definitions */
 #define USB_IRDA_HEADER            0x01
 #define USB_CLASS_IRDA             0x02 /* USB_CLASS_APP_SPEC subclass */
 #define USB_DT_IRDA                0x21
+#define USB_IRDA_SIGMATEL_HEADER   0x03
+#define IU_SIGMATEL_MAX_RX_URBS    (IU_MAX_ACTIVE_RX_URBS + USB_IRDA_SIGMATEL_HEADER)
 
 struct irda_class_desc {
 	__u8  bLength;
@@ -123,6 +133,7 @@ struct irda_class_desc {
  * (6.2.5, USB-IrDA class spec 1.0) */
 
 #define IU_REQ_GET_CLASS_DESC	0x06
+#define STIR421X_MAX_PATCH_DOWNLOAD_SIZE 1023
 
 struct irda_usb_cb {
 	struct irda_class_desc *irda_desc;
@@ -136,7 +147,8 @@ struct irda_usb_cb {
 	__u16 bulk_out_mtu;		/* Max Tx packet size in bytes */
 	__u8  bulk_int_ep;		/* Interrupt Endpoint assignments */
 
-	struct urb *rx_urb[IU_MAX_RX_URBS];	/* URBs used to receive data frames */
+	__u8  max_rx_urb;
+	struct urb **rx_urb;	        /* URBs used to receive data frames */
 	struct urb *idle_rx_urb;	/* Pointer to idle URB in Rx path */
 	struct urb *tx_urb;		/* URB used to send data frames */
 	struct urb *speed_urb;		/* URB used to send speed commands */
@@ -157,6 +169,9 @@ struct irda_usb_cb {
 	__u32 speed;			/* Current speed */
 	__s32 new_speed;		/* speed we need to set */
 
+	__u8 header_length;             /* USB-IrDA frame header size */
+	int needspatch;        		/* device needs firmware patch */
+
 	struct timer_list rx_defer_timer;	/* Wait for Rx error to clear */
 };