/***************************************************************************** * * Filename: irda-usb.h * Version: 0.9b * Description: IrDA-USB Driver * Status: Experimental * Author: Dag Brattli * * Copyright (C) 2001, Roman Weissgaerber * Copyright (C) 2000, Dag Brattli * Copyright (C) 2001, Jean Tourrilhes * * 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 * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. * *****************************************************************************/ #include #include #include #include #define RX_COPY_THRESHOLD 200 #define IRDA_USB_MAX_MTU 2051 #define IRDA_USB_SPEED_MTU 64 /* Weird, but work like this */ /* Maximum number of active URB on the Rx path * This is the amount of buffers the we keep between the USB harware and the * IrDA stack. * * Note : the network layer does also queue the packets between us and the * IrDA stack, and is actually pretty fast and efficient in doing that. * Therefore, we don't need to have a large number of URBs, and we can * perfectly live happy with only one. We certainly don't need to keep the * full IrTTP window around here... * I repeat for those who have trouble to understand : 1 URB is plenty * good enough to handle back-to-back (brickwalled) frames. I tried it, * it works (it's the hardware that has trouble doing it). * * Having 2 URBs would allow the USB stack to process one URB while we take * care of the other and then swap the URBs... * On the other hand, increasing the number of URB will have penalities * in term of latency and will interact with the link management in IrLAP... * Jean II */ #define IU_MAX_ACTIVE_RX_URBS 1 /* Don't touch !!! */ /* When a Rx URB is passed back to us, we can't reuse it immediately, * because it may still be referenced by the USB layer. Therefore we * need to keep one extra URB in the Rx path. * Jean II */ #define IU_MAX_RX_URBS (IU_MAX_ACTIVE_RX_URBS + 1) /* Various ugly stuff to try to workaround generic problems */ /* Send speed command in case of timeout, just for trying to get things sane */ #define IU_BUG_KICK_TIMEOUT /* Show the USB class descriptor */ #undef IU_DUMP_CLASS_DESC /* Assume a minimum round trip latency for USB transfer (in us)... * USB transfer are done in the next USB slot if there is no traffic * (1/19 msec) and is done at 12 Mb/s : * Waiting for slot + tx = (53us + 16us) * 2 = 137us minimum. * Rx notification will only be done at the end of the USB frame period : * OHCI : frame period = 1ms * UHCI : frame period = 1ms, but notification can take 2 or 3 ms :-( * EHCI : frame period = 125us */ #define IU_USB_MIN_RTT 500 /* This should be safe in most cases */ /* Inbound header */ #define MEDIA_BUSY 0x80 #define SPEED_2400 0x01 #define SPEED_9600 0x02 #define SPEED_19200 0x03 #define SPEED_38400 0x04 #define SPEED_57600 0x05 #define SPEED_115200 0x06 #define SPEED_576000 0x07 #define SPEED_1152000 0x08 #define SPEED_4000000 0x09 /* Basic capabilities */ #define IUC_DEFAULT 0x00 /* Basic device compliant with 1.0 spec */ /* Main bugs */ #define IUC_SPEED_BUG 0x01 /* Device doesn't set speed after the frame */ #define IUC_NO_WINDOW 0x02 /* Device doesn't behave with big Rx window */ #define IUC_NO_TURN 0x04 /* Device doesn't do turnaround by itself */ /* Not currently used */ #define IUC_SIR_ONLY 0x08 /* Device doesn't behave at FIR speeds */ #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 */ /* USB class definitions */ #define USB_IRDA_HEADER 0x01 #define USB_CLASS_IRDA 0x02 /* USB_CLASS_APP_SPEC subclass */ #define USB_DT_IRDA 0x21 struct irda_class_desc { __u8 bLength; __u8 bDescriptorType; __u16 bcdSpecRevision; __u8 bmDataSize; __u8 bmWindowSize; __u8 bmMinTurnaroundTime; __u16 wBaudRate; __u8 bmAdditionalBOFs; __u8 bIrdaRateSniff; __u8 bMaxUnicastList; } __attribute__ ((packed)); /* class specific interface request to get the IrDA-USB class descriptor * (6.2.5, USB-IrDA class spec 1.0) */ #define IU_REQ_GET_CLASS_DESC 0x06 struct irda_usb_cb { struct irda_class_desc *irda_desc; struct usb_device *usbdev; /* init: probe_irda */ unsigned int ifnum; /* Interface number of the USB dev. */ int netopen; /* Device is active for network */ int present; /* Device is present on the bus */ __u32 capability; /* Capability of the hardware */ __u8 bulk_in_ep; /* Rx Endpoint assignments */ __u8 bulk_out_ep; /* Tx Endpoint assignments */ __u16 bulk_out_mtu; /* Max Tx packet size in bytes */ __u8 bulk_int_ep; /* Interrupt Endpoint assignments */ wait_queue_head_t wait_q; /* for timeouts */ struct urb rx_urb[IU_MAX_RX_URBS]; /* 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 */ struct net_device *netdev; /* Yes! we are some kind of netdev. */ struct net_device_stats stats; struct irlap_cb *irlap; /* The link layer we are binded to */ struct qos_info qos; hashbin_t *tx_list; /* Queued transmit skb's */ char *speed_buff; /* Buffer for speed changes */ struct timeval stamp; struct timeval now; spinlock_t lock; /* For serializing operations */ __u16 xbofs; /* Current xbofs setting */ __s16 new_xbofs; /* xbofs we need to set */ __u32 speed; /* Current speed */ __s32 new_speed; /* speed we need to set */ __u32 flags; /* Interface flags */ };
