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Diffstat (limited to 'drivers/net/irda/irda-usb.h')
| -rw-r--r-- | drivers/net/irda/irda-usb.h | 163 |
1 files changed, 163 insertions, 0 deletions
diff --git a/drivers/net/irda/irda-usb.h b/drivers/net/irda/irda-usb.h new file mode 100644 index 00000000000..bd8f6654232 --- /dev/null +++ b/drivers/net/irda/irda-usb.h @@ -0,0 +1,163 @@ +/***************************************************************************** + * + * Filename: irda-usb.h + * Version: 0.9b + * Description: IrDA-USB Driver + * Status: Experimental + * Author: Dag Brattli <dag@brattli.net> + * + * 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> + * + * 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 <linux/time.h> + +#include <net/irda/irda.h> +#include <net/irda/irda_device.h> /* struct irlap_cb */ + +#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 */ + struct usb_interface *usbintf; /* init: probe_irda */ + 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 */ +}; + |