| /***************************************************************************** |
| * |
| * 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 */ |
| }; |
| |