mirror of
https://github.com/FEX-Emu/linux.git
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1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
1603 lines
49 KiB
C
1603 lines
49 KiB
C
/*****************************************************************************
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*
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* Filename: irda-usb.c
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* Version: 0.9b
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* Description: IrDA-USB Driver
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* Status: Experimental
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* Author: Dag Brattli <dag@brattli.net>
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*
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* Copyright (C) 2000, Roman Weissgaerber <weissg@vienna.at>
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* Copyright (C) 2001, Dag Brattli <dag@brattli.net>
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* Copyright (C) 2001, Jean Tourrilhes <jt@hpl.hp.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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*****************************************************************************/
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/*
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* IMPORTANT NOTE
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* --------------
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*
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* As of kernel 2.5.20, this is the state of compliance and testing of
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* this driver (irda-usb) with regards to the USB low level drivers...
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*
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* This driver has been tested SUCCESSFULLY with the following drivers :
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* o usb-uhci-hcd (For Intel/Via USB controllers)
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* o uhci-hcd (Alternate/JE driver for Intel/Via USB controllers)
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* o ohci-hcd (For other USB controllers)
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*
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* This driver has NOT been tested with the following drivers :
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* o ehci-hcd (USB 2.0 controllers)
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*
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* Note that all HCD drivers do URB_ZERO_PACKET and timeout properly,
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* so we don't have to worry about that anymore.
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* One common problem is the failure to set the address on the dongle,
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* but this happens before the driver gets loaded...
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*
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* Jean II
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*/
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/*------------------------------------------------------------------*/
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#include <linux/module.h>
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#include <linux/moduleparam.h>
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#include <linux/kernel.h>
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#include <linux/types.h>
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#include <linux/init.h>
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#include <linux/skbuff.h>
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#include <linux/netdevice.h>
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#include <linux/slab.h>
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#include <linux/rtnetlink.h>
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#include <linux/usb.h>
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#include "irda-usb.h"
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/*------------------------------------------------------------------*/
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static int qos_mtt_bits = 0;
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/* These are the currently known IrDA USB dongles. Add new dongles here */
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static struct usb_device_id dongles[] = {
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/* ACTiSYS Corp., ACT-IR2000U FIR-USB Adapter */
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{ USB_DEVICE(0x9c4, 0x011), .driver_info = IUC_SPEED_BUG | IUC_NO_WINDOW },
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/* Look like ACTiSYS, Report : IBM Corp., IBM UltraPort IrDA */
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{ USB_DEVICE(0x4428, 0x012), .driver_info = IUC_SPEED_BUG | IUC_NO_WINDOW },
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/* KC Technology Inc., KC-180 USB IrDA Device */
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{ USB_DEVICE(0x50f, 0x180), .driver_info = IUC_SPEED_BUG | IUC_NO_WINDOW },
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/* Extended Systems, Inc., XTNDAccess IrDA USB (ESI-9685) */
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{ USB_DEVICE(0x8e9, 0x100), .driver_info = IUC_SPEED_BUG | IUC_NO_WINDOW },
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{ .match_flags = USB_DEVICE_ID_MATCH_INT_CLASS |
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USB_DEVICE_ID_MATCH_INT_SUBCLASS,
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.bInterfaceClass = USB_CLASS_APP_SPEC,
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.bInterfaceSubClass = USB_CLASS_IRDA,
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.driver_info = IUC_DEFAULT, },
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{ }, /* The end */
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};
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/*
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* Important note :
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* Devices based on the SigmaTel chipset (0x66f, 0x4200) are not designed
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* using the "USB-IrDA specification" (yes, there exist such a thing), and
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* therefore not supported by this driver (don't add them above).
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* There is a Linux driver, stir4200, that support those USB devices.
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* Jean II
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*/
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MODULE_DEVICE_TABLE(usb, dongles);
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/*------------------------------------------------------------------*/
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static struct irda_class_desc *irda_usb_find_class_desc(struct usb_interface *intf);
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static void irda_usb_disconnect(struct usb_interface *intf);
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static void irda_usb_change_speed_xbofs(struct irda_usb_cb *self);
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static int irda_usb_hard_xmit(struct sk_buff *skb, struct net_device *dev);
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static int irda_usb_open(struct irda_usb_cb *self);
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static void irda_usb_close(struct irda_usb_cb *self);
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static void speed_bulk_callback(struct urb *urb, struct pt_regs *regs);
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static void write_bulk_callback(struct urb *urb, struct pt_regs *regs);
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static void irda_usb_receive(struct urb *urb, struct pt_regs *regs);
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static int irda_usb_net_open(struct net_device *dev);
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static int irda_usb_net_close(struct net_device *dev);
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static int irda_usb_net_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
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static void irda_usb_net_timeout(struct net_device *dev);
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static struct net_device_stats *irda_usb_net_get_stats(struct net_device *dev);
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/************************ TRANSMIT ROUTINES ************************/
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/*
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* Receive packets from the IrDA stack and send them on the USB pipe.
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* Handle speed change, timeout and lot's of ugliness...
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*/
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/*------------------------------------------------------------------*/
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/*
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* Function irda_usb_build_header(self, skb, header)
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*
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* Builds USB-IrDA outbound header
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*
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* When we send an IrDA frame over an USB pipe, we add to it a 1 byte
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* header. This function create this header with the proper values.
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*
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* Important note : the USB-IrDA spec 1.0 say very clearly in chapter 5.4.2.2
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* that the setting of the link speed and xbof number in this outbound header
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* should be applied *AFTER* the frame has been sent.
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* Unfortunately, some devices are not compliant with that... It seems that
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* reading the spec is far too difficult...
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* Jean II
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*/
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static void irda_usb_build_header(struct irda_usb_cb *self,
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__u8 *header,
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int force)
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{
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/* Set the negotiated link speed */
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if (self->new_speed != -1) {
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/* Hum... Ugly hack :-(
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* Some device are not compliant with the spec and change
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* parameters *before* sending the frame. - Jean II
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*/
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if ((self->capability & IUC_SPEED_BUG) &&
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(!force) && (self->speed != -1)) {
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/* No speed and xbofs change here
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* (we'll do it later in the write callback) */
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IRDA_DEBUG(2, "%s(), not changing speed yet\n", __FUNCTION__);
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*header = 0;
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return;
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}
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IRDA_DEBUG(2, "%s(), changing speed to %d\n", __FUNCTION__, self->new_speed);
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self->speed = self->new_speed;
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/* We will do ` self->new_speed = -1; ' in the completion
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* handler just in case the current URB fail - Jean II */
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switch (self->speed) {
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case 2400:
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*header = SPEED_2400;
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break;
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default:
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case 9600:
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*header = SPEED_9600;
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break;
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case 19200:
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*header = SPEED_19200;
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break;
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case 38400:
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*header = SPEED_38400;
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break;
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case 57600:
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*header = SPEED_57600;
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break;
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case 115200:
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*header = SPEED_115200;
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break;
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case 576000:
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*header = SPEED_576000;
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break;
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case 1152000:
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*header = SPEED_1152000;
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break;
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case 4000000:
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*header = SPEED_4000000;
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self->new_xbofs = 0;
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break;
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}
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} else
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/* No change */
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*header = 0;
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/* Set the negotiated additional XBOFS */
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if (self->new_xbofs != -1) {
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IRDA_DEBUG(2, "%s(), changing xbofs to %d\n", __FUNCTION__, self->new_xbofs);
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self->xbofs = self->new_xbofs;
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/* We will do ` self->new_xbofs = -1; ' in the completion
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* handler just in case the current URB fail - Jean II */
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switch (self->xbofs) {
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case 48:
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*header |= 0x10;
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break;
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case 28:
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case 24: /* USB spec 1.0 says 24 */
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*header |= 0x20;
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break;
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default:
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case 12:
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*header |= 0x30;
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break;
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case 5: /* Bug in IrLAP spec? (should be 6) */
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case 6:
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*header |= 0x40;
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break;
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case 3:
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*header |= 0x50;
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break;
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case 2:
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*header |= 0x60;
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break;
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case 1:
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*header |= 0x70;
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break;
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case 0:
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*header |= 0x80;
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break;
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}
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}
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}
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/*------------------------------------------------------------------*/
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/*
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* Send a command to change the speed of the dongle
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* Need to be called with spinlock on.
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*/
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static void irda_usb_change_speed_xbofs(struct irda_usb_cb *self)
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{
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__u8 *frame;
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struct urb *urb;
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int ret;
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IRDA_DEBUG(2, "%s(), speed=%d, xbofs=%d\n", __FUNCTION__,
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self->new_speed, self->new_xbofs);
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/* Grab the speed URB */
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urb = self->speed_urb;
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if (urb->status != 0) {
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IRDA_WARNING("%s(), URB still in use!\n", __FUNCTION__);
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return;
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}
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/* Allocate the fake frame */
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frame = self->speed_buff;
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/* Set the new speed and xbofs in this fake frame */
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irda_usb_build_header(self, frame, 1);
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/* Submit the 0 length IrDA frame to trigger new speed settings */
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usb_fill_bulk_urb(urb, self->usbdev,
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usb_sndbulkpipe(self->usbdev, self->bulk_out_ep),
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frame, IRDA_USB_SPEED_MTU,
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speed_bulk_callback, self);
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urb->transfer_buffer_length = USB_IRDA_HEADER;
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urb->transfer_flags = URB_ASYNC_UNLINK;
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/* Irq disabled -> GFP_ATOMIC */
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if ((ret = usb_submit_urb(urb, GFP_ATOMIC))) {
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IRDA_WARNING("%s(), failed Speed URB\n", __FUNCTION__);
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}
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}
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/*------------------------------------------------------------------*/
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/*
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* Speed URB callback
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* Now, we can only get called for the speed URB.
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*/
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static void speed_bulk_callback(struct urb *urb, struct pt_regs *regs)
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{
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struct irda_usb_cb *self = urb->context;
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IRDA_DEBUG(2, "%s()\n", __FUNCTION__);
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/* We should always have a context */
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IRDA_ASSERT(self != NULL, return;);
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/* We should always be called for the speed URB */
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IRDA_ASSERT(urb == self->speed_urb, return;);
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/* Check for timeout and other USB nasties */
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if (urb->status != 0) {
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/* I get a lot of -ECONNABORTED = -103 here - Jean II */
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IRDA_DEBUG(0, "%s(), URB complete status %d, transfer_flags 0x%04X\n", __FUNCTION__, urb->status, urb->transfer_flags);
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/* Don't do anything here, that might confuse the USB layer.
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* Instead, we will wait for irda_usb_net_timeout(), the
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* network layer watchdog, to fix the situation.
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* Jean II */
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/* A reset of the dongle might be welcomed here - Jean II */
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return;
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}
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/* urb is now available */
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//urb->status = 0; -> tested above
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/* New speed and xbof is now commited in hardware */
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self->new_speed = -1;
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self->new_xbofs = -1;
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/* Allow the stack to send more packets */
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netif_wake_queue(self->netdev);
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}
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/*------------------------------------------------------------------*/
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/*
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* Send an IrDA frame to the USB dongle (for transmission)
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*/
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static int irda_usb_hard_xmit(struct sk_buff *skb, struct net_device *netdev)
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{
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struct irda_usb_cb *self = netdev->priv;
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struct urb *urb = self->tx_urb;
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unsigned long flags;
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s32 speed;
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s16 xbofs;
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int res, mtt;
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int err = 1; /* Failed */
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IRDA_DEBUG(4, "%s() on %s\n", __FUNCTION__, netdev->name);
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netif_stop_queue(netdev);
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/* Protect us from USB callbacks, net watchdog and else. */
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spin_lock_irqsave(&self->lock, flags);
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|
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/* Check if the device is still there.
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* We need to check self->present under the spinlock because
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* of irda_usb_disconnect() is synchronous - Jean II */
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if (!self->present) {
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IRDA_DEBUG(0, "%s(), Device is gone...\n", __FUNCTION__);
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goto drop;
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}
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/* Check if we need to change the number of xbofs */
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xbofs = irda_get_next_xbofs(skb);
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if ((xbofs != self->xbofs) && (xbofs != -1)) {
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self->new_xbofs = xbofs;
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}
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|
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/* Check if we need to change the speed */
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speed = irda_get_next_speed(skb);
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if ((speed != self->speed) && (speed != -1)) {
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/* Set the desired speed */
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self->new_speed = speed;
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|
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/* Check for empty frame */
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if (!skb->len) {
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/* IrLAP send us an empty frame to make us change the
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* speed. Changing speed with the USB adapter is in
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* fact sending an empty frame to the adapter, so we
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* could just let the present function do its job.
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* However, we would wait for min turn time,
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* do an extra memcpy and increment packet counters...
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* Jean II */
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irda_usb_change_speed_xbofs(self);
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netdev->trans_start = jiffies;
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/* Will netif_wake_queue() in callback */
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err = 0; /* No error */
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goto drop;
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}
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}
|
|
|
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if (urb->status != 0) {
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IRDA_WARNING("%s(), URB still in use!\n", __FUNCTION__);
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goto drop;
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}
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|
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/* Make sure there is room for IrDA-USB header. The actual
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* allocation will be done lower in skb_push().
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* Also, we don't use directly skb_cow(), because it require
|
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* headroom >= 16, which force unnecessary copies - Jean II */
|
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if (skb_headroom(skb) < USB_IRDA_HEADER) {
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IRDA_DEBUG(0, "%s(), Insuficient skb headroom.\n", __FUNCTION__);
|
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if (skb_cow(skb, USB_IRDA_HEADER)) {
|
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IRDA_WARNING("%s(), failed skb_cow() !!!\n", __FUNCTION__);
|
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goto drop;
|
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}
|
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}
|
|
|
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/* Change setting for next frame */
|
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irda_usb_build_header(self, skb_push(skb, USB_IRDA_HEADER), 0);
|
|
|
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/* FIXME: Make macro out of this one */
|
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((struct irda_skb_cb *)skb->cb)->context = self;
|
|
|
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usb_fill_bulk_urb(urb, self->usbdev,
|
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usb_sndbulkpipe(self->usbdev, self->bulk_out_ep),
|
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skb->data, IRDA_SKB_MAX_MTU,
|
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write_bulk_callback, skb);
|
|
urb->transfer_buffer_length = skb->len;
|
|
/* Note : unlink *must* be Asynchronous because of the code in
|
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* irda_usb_net_timeout() -> call in irq - Jean II */
|
|
urb->transfer_flags = URB_ASYNC_UNLINK;
|
|
/* This flag (URB_ZERO_PACKET) indicates that what we send is not
|
|
* a continuous stream of data but separate packets.
|
|
* In this case, the USB layer will insert an empty USB frame (TD)
|
|
* after each of our packets that is exact multiple of the frame size.
|
|
* This is how the dongle will detect the end of packet - Jean II */
|
|
urb->transfer_flags |= URB_ZERO_PACKET;
|
|
|
|
/* Generate min turn time. FIXME: can we do better than this? */
|
|
/* Trying to a turnaround time at this level is trying to measure
|
|
* processor clock cycle with a wrist-watch, approximate at best...
|
|
*
|
|
* What we know is the last time we received a frame over USB.
|
|
* Due to latency over USB that depend on the USB load, we don't
|
|
* know when this frame was received over IrDA (a few ms before ?)
|
|
* Then, same story for our outgoing frame...
|
|
*
|
|
* In theory, the USB dongle is supposed to handle the turnaround
|
|
* by itself (spec 1.0, chater 4, page 6). Who knows ??? That's
|
|
* why this code is enabled only for dongles that doesn't meet
|
|
* the spec.
|
|
* Jean II */
|
|
if (self->capability & IUC_NO_TURN) {
|
|
mtt = irda_get_mtt(skb);
|
|
if (mtt) {
|
|
int diff;
|
|
do_gettimeofday(&self->now);
|
|
diff = self->now.tv_usec - self->stamp.tv_usec;
|
|
#ifdef IU_USB_MIN_RTT
|
|
/* Factor in USB delays -> Get rid of udelay() that
|
|
* would be lost in the noise - Jean II */
|
|
diff += IU_USB_MIN_RTT;
|
|
#endif /* IU_USB_MIN_RTT */
|
|
/* If the usec counter did wraparound, the diff will
|
|
* go negative (tv_usec is a long), so we need to
|
|
* correct it by one second. Jean II */
|
|
if (diff < 0)
|
|
diff += 1000000;
|
|
|
|
/* Check if the mtt is larger than the time we have
|
|
* already used by all the protocol processing
|
|
*/
|
|
if (mtt > diff) {
|
|
mtt -= diff;
|
|
if (mtt > 1000)
|
|
mdelay(mtt/1000);
|
|
else
|
|
udelay(mtt);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Ask USB to send the packet - Irq disabled -> GFP_ATOMIC */
|
|
if ((res = usb_submit_urb(urb, GFP_ATOMIC))) {
|
|
IRDA_WARNING("%s(), failed Tx URB\n", __FUNCTION__);
|
|
self->stats.tx_errors++;
|
|
/* Let USB recover : We will catch that in the watchdog */
|
|
/*netif_start_queue(netdev);*/
|
|
} else {
|
|
/* Increment packet stats */
|
|
self->stats.tx_packets++;
|
|
self->stats.tx_bytes += skb->len;
|
|
|
|
netdev->trans_start = jiffies;
|
|
}
|
|
spin_unlock_irqrestore(&self->lock, flags);
|
|
|
|
return 0;
|
|
|
|
drop:
|
|
/* Drop silently the skb and exit */
|
|
dev_kfree_skb(skb);
|
|
spin_unlock_irqrestore(&self->lock, flags);
|
|
return err; /* Usually 1 */
|
|
}
|
|
|
|
/*------------------------------------------------------------------*/
|
|
/*
|
|
* Note : this function will be called only for tx_urb...
|
|
*/
|
|
static void write_bulk_callback(struct urb *urb, struct pt_regs *regs)
|
|
{
|
|
unsigned long flags;
|
|
struct sk_buff *skb = urb->context;
|
|
struct irda_usb_cb *self = ((struct irda_skb_cb *) skb->cb)->context;
|
|
|
|
IRDA_DEBUG(2, "%s()\n", __FUNCTION__);
|
|
|
|
/* We should always have a context */
|
|
IRDA_ASSERT(self != NULL, return;);
|
|
/* We should always be called for the speed URB */
|
|
IRDA_ASSERT(urb == self->tx_urb, return;);
|
|
|
|
/* Free up the skb */
|
|
dev_kfree_skb_any(skb);
|
|
urb->context = NULL;
|
|
|
|
/* Check for timeout and other USB nasties */
|
|
if (urb->status != 0) {
|
|
/* I get a lot of -ECONNABORTED = -103 here - Jean II */
|
|
IRDA_DEBUG(0, "%s(), URB complete status %d, transfer_flags 0x%04X\n", __FUNCTION__, urb->status, urb->transfer_flags);
|
|
|
|
/* Don't do anything here, that might confuse the USB layer,
|
|
* and we could go in recursion and blow the kernel stack...
|
|
* Instead, we will wait for irda_usb_net_timeout(), the
|
|
* network layer watchdog, to fix the situation.
|
|
* Jean II */
|
|
/* A reset of the dongle might be welcomed here - Jean II */
|
|
return;
|
|
}
|
|
|
|
/* urb is now available */
|
|
//urb->status = 0; -> tested above
|
|
|
|
/* Make sure we read self->present properly */
|
|
spin_lock_irqsave(&self->lock, flags);
|
|
|
|
/* If the network is closed, stop everything */
|
|
if ((!self->netopen) || (!self->present)) {
|
|
IRDA_DEBUG(0, "%s(), Network is gone...\n", __FUNCTION__);
|
|
spin_unlock_irqrestore(&self->lock, flags);
|
|
return;
|
|
}
|
|
|
|
/* If changes to speed or xbofs is pending... */
|
|
if ((self->new_speed != -1) || (self->new_xbofs != -1)) {
|
|
if ((self->new_speed != self->speed) ||
|
|
(self->new_xbofs != self->xbofs)) {
|
|
/* We haven't changed speed yet (because of
|
|
* IUC_SPEED_BUG), so do it now - Jean II */
|
|
IRDA_DEBUG(1, "%s(), Changing speed now...\n", __FUNCTION__);
|
|
irda_usb_change_speed_xbofs(self);
|
|
} else {
|
|
/* New speed and xbof is now commited in hardware */
|
|
self->new_speed = -1;
|
|
self->new_xbofs = -1;
|
|
/* Done, waiting for next packet */
|
|
netif_wake_queue(self->netdev);
|
|
}
|
|
} else {
|
|
/* Otherwise, allow the stack to send more packets */
|
|
netif_wake_queue(self->netdev);
|
|
}
|
|
spin_unlock_irqrestore(&self->lock, flags);
|
|
}
|
|
|
|
/*------------------------------------------------------------------*/
|
|
/*
|
|
* Watchdog timer from the network layer.
|
|
* After a predetermined timeout, if we don't give confirmation that
|
|
* the packet has been sent (i.e. no call to netif_wake_queue()),
|
|
* the network layer will call this function.
|
|
* Note that URB that we submit have also a timeout. When the URB timeout
|
|
* expire, the normal URB callback is called (write_bulk_callback()).
|
|
*/
|
|
static void irda_usb_net_timeout(struct net_device *netdev)
|
|
{
|
|
unsigned long flags;
|
|
struct irda_usb_cb *self = netdev->priv;
|
|
struct urb *urb;
|
|
int done = 0; /* If we have made any progress */
|
|
|
|
IRDA_DEBUG(0, "%s(), Network layer thinks we timed out!\n", __FUNCTION__);
|
|
IRDA_ASSERT(self != NULL, return;);
|
|
|
|
/* Protect us from USB callbacks, net Tx and else. */
|
|
spin_lock_irqsave(&self->lock, flags);
|
|
|
|
/* self->present *MUST* be read under spinlock */
|
|
if (!self->present) {
|
|
IRDA_WARNING("%s(), device not present!\n", __FUNCTION__);
|
|
netif_stop_queue(netdev);
|
|
spin_unlock_irqrestore(&self->lock, flags);
|
|
return;
|
|
}
|
|
|
|
/* Check speed URB */
|
|
urb = self->speed_urb;
|
|
if (urb->status != 0) {
|
|
IRDA_DEBUG(0, "%s: Speed change timed out, urb->status=%d, urb->transfer_flags=0x%04X\n", netdev->name, urb->status, urb->transfer_flags);
|
|
|
|
switch (urb->status) {
|
|
case -EINPROGRESS:
|
|
usb_unlink_urb(urb);
|
|
/* Note : above will *NOT* call netif_wake_queue()
|
|
* in completion handler, we will come back here.
|
|
* Jean II */
|
|
done = 1;
|
|
break;
|
|
case -ECONNABORTED: /* -103 */
|
|
case -ECONNRESET: /* -104 */
|
|
case -ETIMEDOUT: /* -110 */
|
|
case -ENOENT: /* -2 (urb unlinked by us) */
|
|
default: /* ??? - Play safe */
|
|
urb->status = 0;
|
|
netif_wake_queue(self->netdev);
|
|
done = 1;
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* Check Tx URB */
|
|
urb = self->tx_urb;
|
|
if (urb->status != 0) {
|
|
struct sk_buff *skb = urb->context;
|
|
|
|
IRDA_DEBUG(0, "%s: Tx timed out, urb->status=%d, urb->transfer_flags=0x%04X\n", netdev->name, urb->status, urb->transfer_flags);
|
|
|
|
/* Increase error count */
|
|
self->stats.tx_errors++;
|
|
|
|
#ifdef IU_BUG_KICK_TIMEOUT
|
|
/* Can't be a bad idea to reset the speed ;-) - Jean II */
|
|
if(self->new_speed == -1)
|
|
self->new_speed = self->speed;
|
|
if(self->new_xbofs == -1)
|
|
self->new_xbofs = self->xbofs;
|
|
irda_usb_change_speed_xbofs(self);
|
|
#endif /* IU_BUG_KICK_TIMEOUT */
|
|
|
|
switch (urb->status) {
|
|
case -EINPROGRESS:
|
|
usb_unlink_urb(urb);
|
|
/* Note : above will *NOT* call netif_wake_queue()
|
|
* in completion handler, because urb->status will
|
|
* be -ENOENT. We will fix that at the next watchdog,
|
|
* leaving more time to USB to recover...
|
|
* Also, we are in interrupt, so we need to have
|
|
* URB_ASYNC_UNLINK to work properly...
|
|
* Jean II */
|
|
done = 1;
|
|
break;
|
|
case -ECONNABORTED: /* -103 */
|
|
case -ECONNRESET: /* -104 */
|
|
case -ETIMEDOUT: /* -110 */
|
|
case -ENOENT: /* -2 (urb unlinked by us) */
|
|
default: /* ??? - Play safe */
|
|
if(skb != NULL) {
|
|
dev_kfree_skb_any(skb);
|
|
urb->context = NULL;
|
|
}
|
|
urb->status = 0;
|
|
netif_wake_queue(self->netdev);
|
|
done = 1;
|
|
break;
|
|
}
|
|
}
|
|
spin_unlock_irqrestore(&self->lock, flags);
|
|
|
|
/* Maybe we need a reset */
|
|
/* Note : Some drivers seem to use a usb_set_interface() when they
|
|
* need to reset the hardware. Hum...
|
|
*/
|
|
|
|
/* if(done == 0) */
|
|
}
|
|
|
|
/************************* RECEIVE ROUTINES *************************/
|
|
/*
|
|
* Receive packets from the USB layer stack and pass them to the IrDA stack.
|
|
* Try to work around USB failures...
|
|
*/
|
|
|
|
/*
|
|
* Note :
|
|
* Some of you may have noticed that most dongle have an interrupt in pipe
|
|
* that we don't use. Here is the little secret...
|
|
* When we hang a Rx URB on the bulk in pipe, it generates some USB traffic
|
|
* in every USB frame. This is unnecessary overhead.
|
|
* The interrupt in pipe will generate an event every time a packet is
|
|
* received. Reading an interrupt pipe adds minimal overhead, but has some
|
|
* latency (~1ms).
|
|
* If we are connected (speed != 9600), we want to minimise latency, so
|
|
* we just always hang the Rx URB and ignore the interrupt.
|
|
* If we are not connected (speed == 9600), there is usually no Rx traffic,
|
|
* and we want to minimise the USB overhead. In this case we should wait
|
|
* on the interrupt pipe and hang the Rx URB only when an interrupt is
|
|
* received.
|
|
* Jean II
|
|
*/
|
|
|
|
/*------------------------------------------------------------------*/
|
|
/*
|
|
* Submit a Rx URB to the USB layer to handle reception of a frame
|
|
* Mostly called by the completion callback of the previous URB.
|
|
*
|
|
* Jean II
|
|
*/
|
|
static void irda_usb_submit(struct irda_usb_cb *self, struct sk_buff *skb, struct urb *urb)
|
|
{
|
|
struct irda_skb_cb *cb;
|
|
int ret;
|
|
|
|
IRDA_DEBUG(2, "%s()\n", __FUNCTION__);
|
|
|
|
/* This should never happen */
|
|
IRDA_ASSERT(skb != NULL, return;);
|
|
IRDA_ASSERT(urb != NULL, return;);
|
|
|
|
/* Save ourselves in the skb */
|
|
cb = (struct irda_skb_cb *) skb->cb;
|
|
cb->context = self;
|
|
|
|
/* Reinitialize URB */
|
|
usb_fill_bulk_urb(urb, self->usbdev,
|
|
usb_rcvbulkpipe(self->usbdev, self->bulk_in_ep),
|
|
skb->data, skb->truesize,
|
|
irda_usb_receive, skb);
|
|
/* Note : unlink *must* be synchronous because of the code in
|
|
* irda_usb_net_close() -> free the skb - Jean II */
|
|
urb->status = 0;
|
|
|
|
/* Can be called from irda_usb_receive (irq handler) -> GFP_ATOMIC */
|
|
ret = usb_submit_urb(urb, GFP_ATOMIC);
|
|
if (ret) {
|
|
/* If this ever happen, we are in deep s***.
|
|
* Basically, the Rx path will stop... */
|
|
IRDA_WARNING("%s(), Failed to submit Rx URB %d\n",
|
|
__FUNCTION__, ret);
|
|
}
|
|
}
|
|
|
|
/*------------------------------------------------------------------*/
|
|
/*
|
|
* Function irda_usb_receive(urb)
|
|
*
|
|
* Called by the USB subsystem when a frame has been received
|
|
*
|
|
*/
|
|
static void irda_usb_receive(struct urb *urb, struct pt_regs *regs)
|
|
{
|
|
struct sk_buff *skb = (struct sk_buff *) urb->context;
|
|
struct irda_usb_cb *self;
|
|
struct irda_skb_cb *cb;
|
|
struct sk_buff *newskb;
|
|
struct sk_buff *dataskb;
|
|
int docopy;
|
|
|
|
IRDA_DEBUG(2, "%s(), len=%d\n", __FUNCTION__, urb->actual_length);
|
|
|
|
/* Find ourselves */
|
|
cb = (struct irda_skb_cb *) skb->cb;
|
|
IRDA_ASSERT(cb != NULL, return;);
|
|
self = (struct irda_usb_cb *) cb->context;
|
|
IRDA_ASSERT(self != NULL, return;);
|
|
|
|
/* If the network is closed or the device gone, stop everything */
|
|
if ((!self->netopen) || (!self->present)) {
|
|
IRDA_DEBUG(0, "%s(), Network is gone!\n", __FUNCTION__);
|
|
/* Don't re-submit the URB : will stall the Rx path */
|
|
return;
|
|
}
|
|
|
|
/* Check the status */
|
|
if (urb->status != 0) {
|
|
switch (urb->status) {
|
|
case -EILSEQ:
|
|
self->stats.rx_errors++;
|
|
self->stats.rx_crc_errors++;
|
|
break;
|
|
case -ECONNRESET: /* -104 */
|
|
IRDA_DEBUG(0, "%s(), Connection Reset (-104), transfer_flags 0x%04X \n", __FUNCTION__, urb->transfer_flags);
|
|
/* uhci_cleanup_unlink() is going to kill the Rx
|
|
* URB just after we return. No problem, at this
|
|
* point the URB will be idle ;-) - Jean II */
|
|
break;
|
|
default:
|
|
IRDA_DEBUG(0, "%s(), RX status %d,transfer_flags 0x%04X \n", __FUNCTION__, urb->status, urb->transfer_flags);
|
|
break;
|
|
}
|
|
goto done;
|
|
}
|
|
|
|
/* Check for empty frames */
|
|
if (urb->actual_length <= USB_IRDA_HEADER) {
|
|
IRDA_WARNING("%s(), empty frame!\n", __FUNCTION__);
|
|
goto done;
|
|
}
|
|
|
|
/*
|
|
* Remember the time we received this frame, so we can
|
|
* reduce the min turn time a bit since we will know
|
|
* how much time we have used for protocol processing
|
|
*/
|
|
do_gettimeofday(&self->stamp);
|
|
|
|
/* Check if we need to copy the data to a new skb or not.
|
|
* For most frames, we use ZeroCopy and pass the already
|
|
* allocated skb up the stack.
|
|
* If the frame is small, it is more efficient to copy it
|
|
* to save memory (copy will be fast anyway - that's
|
|
* called Rx-copy-break). Jean II */
|
|
docopy = (urb->actual_length < IRDA_RX_COPY_THRESHOLD);
|
|
|
|
/* Allocate a new skb */
|
|
newskb = dev_alloc_skb(docopy ? urb->actual_length : IRDA_SKB_MAX_MTU);
|
|
if (!newskb) {
|
|
self->stats.rx_dropped++;
|
|
/* We could deliver the current skb, but this would stall
|
|
* the Rx path. Better drop the packet... Jean II */
|
|
goto done;
|
|
}
|
|
|
|
/* Make sure IP header get aligned (IrDA header is 5 bytes) */
|
|
/* But IrDA-USB header is 1 byte. Jean II */
|
|
//skb_reserve(newskb, USB_IRDA_HEADER - 1);
|
|
|
|
if(docopy) {
|
|
/* Copy packet, so we can recycle the original */
|
|
memcpy(newskb->data, skb->data, urb->actual_length);
|
|
/* Deliver this new skb */
|
|
dataskb = newskb;
|
|
/* And hook the old skb to the URB
|
|
* Note : we don't need to "clean up" the old skb,
|
|
* as we never touched it. Jean II */
|
|
} else {
|
|
/* We are using ZeroCopy. Deliver old skb */
|
|
dataskb = skb;
|
|
/* And hook the new skb to the URB */
|
|
skb = newskb;
|
|
}
|
|
|
|
/* Set proper length on skb & remove USB-IrDA header */
|
|
skb_put(dataskb, urb->actual_length);
|
|
skb_pull(dataskb, USB_IRDA_HEADER);
|
|
|
|
/* Ask the networking layer to queue the packet for the IrDA stack */
|
|
dataskb->dev = self->netdev;
|
|
dataskb->mac.raw = dataskb->data;
|
|
dataskb->protocol = htons(ETH_P_IRDA);
|
|
netif_rx(dataskb);
|
|
|
|
/* Keep stats up to date */
|
|
self->stats.rx_bytes += dataskb->len;
|
|
self->stats.rx_packets++;
|
|
self->netdev->last_rx = jiffies;
|
|
|
|
done:
|
|
/* Note : at this point, the URB we've just received (urb)
|
|
* is still referenced by the USB layer. For example, if we
|
|
* have received a -ECONNRESET, uhci_cleanup_unlink() will
|
|
* continue to process it (in fact, cleaning it up).
|
|
* If we were to submit this URB, disaster would ensue.
|
|
* Therefore, we submit our idle URB, and put this URB in our
|
|
* idle slot....
|
|
* Jean II */
|
|
/* Note : with this scheme, we could submit the idle URB before
|
|
* processing the Rx URB. Another time... Jean II */
|
|
|
|
/* Submit the idle URB to replace the URB we've just received */
|
|
irda_usb_submit(self, skb, self->idle_rx_urb);
|
|
/* Recycle Rx URB : Now, the idle URB is the present one */
|
|
urb->context = NULL;
|
|
self->idle_rx_urb = urb;
|
|
}
|
|
|
|
/*------------------------------------------------------------------*/
|
|
/*
|
|
* Callbak from IrDA layer. IrDA wants to know if we have
|
|
* started receiving anything.
|
|
*/
|
|
static int irda_usb_is_receiving(struct irda_usb_cb *self)
|
|
{
|
|
/* Note : because of the way UHCI works, it's almost impossible
|
|
* to get this info. The Controller DMA directly to memory and
|
|
* signal only when the whole frame is finished. To know if the
|
|
* first TD of the URB has been filled or not seems hard work...
|
|
*
|
|
* The other solution would be to use the "receiving" command
|
|
* on the default decriptor with a usb_control_msg(), but that
|
|
* would add USB traffic and would return result only in the
|
|
* next USB frame (~1ms).
|
|
*
|
|
* I've been told that current dongles send status info on their
|
|
* interrupt endpoint, and that's what the Windows driver uses
|
|
* to know this info. Unfortunately, this is not yet in the spec...
|
|
*
|
|
* Jean II
|
|
*/
|
|
|
|
return 0; /* For now */
|
|
}
|
|
|
|
/********************** IRDA DEVICE CALLBACKS **********************/
|
|
/*
|
|
* Main calls from the IrDA/Network subsystem.
|
|
* Mostly registering a new irda-usb device and removing it....
|
|
* We only deal with the IrDA side of the business, the USB side will
|
|
* be dealt with below...
|
|
*/
|
|
|
|
|
|
/*------------------------------------------------------------------*/
|
|
/*
|
|
* Function irda_usb_net_open (dev)
|
|
*
|
|
* Network device is taken up. Usually this is done by "ifconfig irda0 up"
|
|
*
|
|
* Note : don't mess with self->netopen - Jean II
|
|
*/
|
|
static int irda_usb_net_open(struct net_device *netdev)
|
|
{
|
|
struct irda_usb_cb *self;
|
|
char hwname[16];
|
|
int i;
|
|
|
|
IRDA_DEBUG(1, "%s()\n", __FUNCTION__);
|
|
|
|
IRDA_ASSERT(netdev != NULL, return -1;);
|
|
self = (struct irda_usb_cb *) netdev->priv;
|
|
IRDA_ASSERT(self != NULL, return -1;);
|
|
|
|
/* Can only open the device if it's there */
|
|
if(!self->present) {
|
|
IRDA_WARNING("%s(), device not present!\n", __FUNCTION__);
|
|
return -1;
|
|
}
|
|
|
|
/* Initialise default speed and xbofs value
|
|
* (IrLAP will change that soon) */
|
|
self->speed = -1;
|
|
self->xbofs = -1;
|
|
self->new_speed = -1;
|
|
self->new_xbofs = -1;
|
|
|
|
/* To do *before* submitting Rx urbs and starting net Tx queue
|
|
* Jean II */
|
|
self->netopen = 1;
|
|
|
|
/*
|
|
* Now that everything should be initialized properly,
|
|
* Open new IrLAP layer instance to take care of us...
|
|
* Note : will send immediately a speed change...
|
|
*/
|
|
sprintf(hwname, "usb#%d", self->usbdev->devnum);
|
|
self->irlap = irlap_open(netdev, &self->qos, hwname);
|
|
IRDA_ASSERT(self->irlap != NULL, return -1;);
|
|
|
|
/* Allow IrLAP to send data to us */
|
|
netif_start_queue(netdev);
|
|
|
|
/* We submit all the Rx URB except for one that we keep idle.
|
|
* Need to be initialised before submitting other USBs, because
|
|
* in some cases as soon as we submit the URBs the USB layer
|
|
* will trigger a dummy receive - Jean II */
|
|
self->idle_rx_urb = self->rx_urb[IU_MAX_ACTIVE_RX_URBS];
|
|
self->idle_rx_urb->context = NULL;
|
|
|
|
/* Now that we can pass data to IrLAP, allow the USB layer
|
|
* to send us some data... */
|
|
for (i = 0; i < IU_MAX_ACTIVE_RX_URBS; i++) {
|
|
struct sk_buff *skb = dev_alloc_skb(IRDA_SKB_MAX_MTU);
|
|
if (!skb) {
|
|
/* If this ever happen, we are in deep s***.
|
|
* Basically, we can't start the Rx path... */
|
|
IRDA_WARNING("%s(), Failed to allocate Rx skb\n",
|
|
__FUNCTION__);
|
|
return -1;
|
|
}
|
|
//skb_reserve(newskb, USB_IRDA_HEADER - 1);
|
|
irda_usb_submit(self, skb, self->rx_urb[i]);
|
|
}
|
|
|
|
/* Ready to play !!! */
|
|
return 0;
|
|
}
|
|
|
|
/*------------------------------------------------------------------*/
|
|
/*
|
|
* Function irda_usb_net_close (self)
|
|
*
|
|
* Network device is taken down. Usually this is done by
|
|
* "ifconfig irda0 down"
|
|
*/
|
|
static int irda_usb_net_close(struct net_device *netdev)
|
|
{
|
|
struct irda_usb_cb *self;
|
|
int i;
|
|
|
|
IRDA_DEBUG(1, "%s()\n", __FUNCTION__);
|
|
|
|
IRDA_ASSERT(netdev != NULL, return -1;);
|
|
self = (struct irda_usb_cb *) netdev->priv;
|
|
IRDA_ASSERT(self != NULL, return -1;);
|
|
|
|
/* Clear this flag *before* unlinking the urbs and *before*
|
|
* stopping the network Tx queue - Jean II */
|
|
self->netopen = 0;
|
|
|
|
/* Stop network Tx queue */
|
|
netif_stop_queue(netdev);
|
|
|
|
/* Deallocate all the Rx path buffers (URBs and skb) */
|
|
for (i = 0; i < IU_MAX_RX_URBS; i++) {
|
|
struct urb *urb = self->rx_urb[i];
|
|
struct sk_buff *skb = (struct sk_buff *) urb->context;
|
|
/* Cancel the receive command */
|
|
usb_kill_urb(urb);
|
|
/* The skb is ours, free it */
|
|
if(skb) {
|
|
dev_kfree_skb(skb);
|
|
urb->context = NULL;
|
|
}
|
|
}
|
|
/* Cancel Tx and speed URB - need to be synchronous to avoid races */
|
|
self->tx_urb->transfer_flags &= ~URB_ASYNC_UNLINK;
|
|
usb_kill_urb(self->tx_urb);
|
|
self->speed_urb->transfer_flags &= ~URB_ASYNC_UNLINK;
|
|
usb_kill_urb(self->speed_urb);
|
|
|
|
/* Stop and remove instance of IrLAP */
|
|
if (self->irlap)
|
|
irlap_close(self->irlap);
|
|
self->irlap = NULL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*------------------------------------------------------------------*/
|
|
/*
|
|
* IOCTLs : Extra out-of-band network commands...
|
|
*/
|
|
static int irda_usb_net_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
|
|
{
|
|
unsigned long flags;
|
|
struct if_irda_req *irq = (struct if_irda_req *) rq;
|
|
struct irda_usb_cb *self;
|
|
int ret = 0;
|
|
|
|
IRDA_ASSERT(dev != NULL, return -1;);
|
|
self = dev->priv;
|
|
IRDA_ASSERT(self != NULL, return -1;);
|
|
|
|
IRDA_DEBUG(2, "%s(), %s, (cmd=0x%X)\n", __FUNCTION__, dev->name, cmd);
|
|
|
|
switch (cmd) {
|
|
case SIOCSBANDWIDTH: /* Set bandwidth */
|
|
if (!capable(CAP_NET_ADMIN))
|
|
return -EPERM;
|
|
/* Protect us from USB callbacks, net watchdog and else. */
|
|
spin_lock_irqsave(&self->lock, flags);
|
|
/* Check if the device is still there */
|
|
if(self->present) {
|
|
/* Set the desired speed */
|
|
self->new_speed = irq->ifr_baudrate;
|
|
irda_usb_change_speed_xbofs(self);
|
|
}
|
|
spin_unlock_irqrestore(&self->lock, flags);
|
|
break;
|
|
case SIOCSMEDIABUSY: /* Set media busy */
|
|
if (!capable(CAP_NET_ADMIN))
|
|
return -EPERM;
|
|
/* Check if the IrDA stack is still there */
|
|
if(self->netopen)
|
|
irda_device_set_media_busy(self->netdev, TRUE);
|
|
break;
|
|
case SIOCGRECEIVING: /* Check if we are receiving right now */
|
|
irq->ifr_receiving = irda_usb_is_receiving(self);
|
|
break;
|
|
default:
|
|
ret = -EOPNOTSUPP;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
/*------------------------------------------------------------------*/
|
|
/*
|
|
* Get device stats (for /proc/net/dev and ifconfig)
|
|
*/
|
|
static struct net_device_stats *irda_usb_net_get_stats(struct net_device *dev)
|
|
{
|
|
struct irda_usb_cb *self = dev->priv;
|
|
return &self->stats;
|
|
}
|
|
|
|
/********************* IRDA CONFIG SUBROUTINES *********************/
|
|
/*
|
|
* Various subroutines dealing with IrDA and network stuff we use to
|
|
* configure and initialise each irda-usb instance.
|
|
* These functions are used below in the main calls of the driver...
|
|
*/
|
|
|
|
/*------------------------------------------------------------------*/
|
|
/*
|
|
* Set proper values in the IrDA QOS structure
|
|
*/
|
|
static inline void irda_usb_init_qos(struct irda_usb_cb *self)
|
|
{
|
|
struct irda_class_desc *desc;
|
|
|
|
IRDA_DEBUG(3, "%s()\n", __FUNCTION__);
|
|
|
|
desc = self->irda_desc;
|
|
|
|
/* Initialize QoS for this device */
|
|
irda_init_max_qos_capabilies(&self->qos);
|
|
|
|
/* See spec section 7.2 for meaning.
|
|
* Values are little endian (as most USB stuff), the IrDA stack
|
|
* use it in native order (see parameters.c). - Jean II */
|
|
self->qos.baud_rate.bits = le16_to_cpu(desc->wBaudRate);
|
|
self->qos.min_turn_time.bits = desc->bmMinTurnaroundTime;
|
|
self->qos.additional_bofs.bits = desc->bmAdditionalBOFs;
|
|
self->qos.window_size.bits = desc->bmWindowSize;
|
|
self->qos.data_size.bits = desc->bmDataSize;
|
|
|
|
IRDA_DEBUG(0, "%s(), dongle says speed=0x%X, size=0x%X, window=0x%X, bofs=0x%X, turn=0x%X\n",
|
|
__FUNCTION__, self->qos.baud_rate.bits, self->qos.data_size.bits, self->qos.window_size.bits, self->qos.additional_bofs.bits, self->qos.min_turn_time.bits);
|
|
|
|
/* Don't always trust what the dongle tell us */
|
|
if(self->capability & IUC_SIR_ONLY)
|
|
self->qos.baud_rate.bits &= 0x00ff;
|
|
if(self->capability & IUC_SMALL_PKT)
|
|
self->qos.data_size.bits = 0x07;
|
|
if(self->capability & IUC_NO_WINDOW)
|
|
self->qos.window_size.bits = 0x01;
|
|
if(self->capability & IUC_MAX_WINDOW)
|
|
self->qos.window_size.bits = 0x7f;
|
|
if(self->capability & IUC_MAX_XBOFS)
|
|
self->qos.additional_bofs.bits = 0x01;
|
|
|
|
#if 1
|
|
/* Module parameter can override the rx window size */
|
|
if (qos_mtt_bits)
|
|
self->qos.min_turn_time.bits = qos_mtt_bits;
|
|
#endif
|
|
/*
|
|
* Note : most of those values apply only for the receive path,
|
|
* the transmit path will be set differently - Jean II
|
|
*/
|
|
irda_qos_bits_to_value(&self->qos);
|
|
}
|
|
|
|
/*------------------------------------------------------------------*/
|
|
/*
|
|
* Initialise the network side of the irda-usb instance
|
|
* Called when a new USB instance is registered in irda_usb_probe()
|
|
*/
|
|
static inline int irda_usb_open(struct irda_usb_cb *self)
|
|
{
|
|
struct net_device *netdev = self->netdev;
|
|
|
|
IRDA_DEBUG(1, "%s()\n", __FUNCTION__);
|
|
|
|
irda_usb_init_qos(self);
|
|
|
|
/* Override the network functions we need to use */
|
|
netdev->hard_start_xmit = irda_usb_hard_xmit;
|
|
netdev->tx_timeout = irda_usb_net_timeout;
|
|
netdev->watchdog_timeo = 250*HZ/1000; /* 250 ms > USB timeout */
|
|
netdev->open = irda_usb_net_open;
|
|
netdev->stop = irda_usb_net_close;
|
|
netdev->get_stats = irda_usb_net_get_stats;
|
|
netdev->do_ioctl = irda_usb_net_ioctl;
|
|
|
|
return register_netdev(netdev);
|
|
}
|
|
|
|
/*------------------------------------------------------------------*/
|
|
/*
|
|
* Cleanup the network side of the irda-usb instance
|
|
* Called when a USB instance is removed in irda_usb_disconnect()
|
|
*/
|
|
static inline void irda_usb_close(struct irda_usb_cb *self)
|
|
{
|
|
IRDA_DEBUG(1, "%s()\n", __FUNCTION__);
|
|
|
|
/* Remove netdevice */
|
|
unregister_netdev(self->netdev);
|
|
|
|
/* Remove the speed buffer */
|
|
if (self->speed_buff != NULL) {
|
|
kfree(self->speed_buff);
|
|
self->speed_buff = NULL;
|
|
}
|
|
}
|
|
|
|
/********************** USB CONFIG SUBROUTINES **********************/
|
|
/*
|
|
* Various subroutines dealing with USB stuff we use to configure and
|
|
* initialise each irda-usb instance.
|
|
* These functions are used below in the main calls of the driver...
|
|
*/
|
|
|
|
/*------------------------------------------------------------------*/
|
|
/*
|
|
* Function irda_usb_parse_endpoints(dev, ifnum)
|
|
*
|
|
* Parse the various endpoints and find the one we need.
|
|
*
|
|
* The endpoint are the pipes used to communicate with the USB device.
|
|
* The spec defines 2 endpoints of type bulk transfer, one in, and one out.
|
|
* These are used to pass frames back and forth with the dongle.
|
|
* Most dongle have also an interrupt endpoint, that will be probably
|
|
* documented in the next spec...
|
|
*/
|
|
static inline int irda_usb_parse_endpoints(struct irda_usb_cb *self, struct usb_host_endpoint *endpoint, int ennum)
|
|
{
|
|
int i; /* Endpoint index in table */
|
|
|
|
/* Init : no endpoints */
|
|
self->bulk_in_ep = 0;
|
|
self->bulk_out_ep = 0;
|
|
self->bulk_int_ep = 0;
|
|
|
|
/* Let's look at all those endpoints */
|
|
for(i = 0; i < ennum; i++) {
|
|
/* All those variables will get optimised by the compiler,
|
|
* so let's aim for clarity... - Jean II */
|
|
__u8 ep; /* Endpoint address */
|
|
__u8 dir; /* Endpoint direction */
|
|
__u8 attr; /* Endpoint attribute */
|
|
__u16 psize; /* Endpoint max packet size in bytes */
|
|
|
|
/* Get endpoint address, direction and attribute */
|
|
ep = endpoint[i].desc.bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
|
|
dir = endpoint[i].desc.bEndpointAddress & USB_ENDPOINT_DIR_MASK;
|
|
attr = endpoint[i].desc.bmAttributes;
|
|
psize = le16_to_cpu(endpoint[i].desc.wMaxPacketSize);
|
|
|
|
/* Is it a bulk endpoint ??? */
|
|
if(attr == USB_ENDPOINT_XFER_BULK) {
|
|
/* We need to find an IN and an OUT */
|
|
if(dir == USB_DIR_IN) {
|
|
/* This is our Rx endpoint */
|
|
self->bulk_in_ep = ep;
|
|
} else {
|
|
/* This is our Tx endpoint */
|
|
self->bulk_out_ep = ep;
|
|
self->bulk_out_mtu = psize;
|
|
}
|
|
} else {
|
|
if((attr == USB_ENDPOINT_XFER_INT) &&
|
|
(dir == USB_DIR_IN)) {
|
|
/* This is our interrupt endpoint */
|
|
self->bulk_int_ep = ep;
|
|
} else {
|
|
IRDA_ERROR("%s(), Unrecognised endpoint %02X.\n", __FUNCTION__, ep);
|
|
}
|
|
}
|
|
}
|
|
|
|
IRDA_DEBUG(0, "%s(), And our endpoints are : in=%02X, out=%02X (%d), int=%02X\n",
|
|
__FUNCTION__, self->bulk_in_ep, self->bulk_out_ep, self->bulk_out_mtu, self->bulk_int_ep);
|
|
/* Should be 8, 16, 32 or 64 bytes */
|
|
IRDA_ASSERT(self->bulk_out_mtu == 64, ;);
|
|
|
|
return((self->bulk_in_ep != 0) && (self->bulk_out_ep != 0));
|
|
}
|
|
|
|
#ifdef IU_DUMP_CLASS_DESC
|
|
/*------------------------------------------------------------------*/
|
|
/*
|
|
* Function usb_irda_dump_class_desc(desc)
|
|
*
|
|
* Prints out the contents of the IrDA class descriptor
|
|
*
|
|
*/
|
|
static inline void irda_usb_dump_class_desc(struct irda_class_desc *desc)
|
|
{
|
|
/* Values are little endian */
|
|
printk("bLength=%x\n", desc->bLength);
|
|
printk("bDescriptorType=%x\n", desc->bDescriptorType);
|
|
printk("bcdSpecRevision=%x\n", le16_to_cpu(desc->bcdSpecRevision));
|
|
printk("bmDataSize=%x\n", desc->bmDataSize);
|
|
printk("bmWindowSize=%x\n", desc->bmWindowSize);
|
|
printk("bmMinTurnaroundTime=%d\n", desc->bmMinTurnaroundTime);
|
|
printk("wBaudRate=%x\n", le16_to_cpu(desc->wBaudRate));
|
|
printk("bmAdditionalBOFs=%x\n", desc->bmAdditionalBOFs);
|
|
printk("bIrdaRateSniff=%x\n", desc->bIrdaRateSniff);
|
|
printk("bMaxUnicastList=%x\n", desc->bMaxUnicastList);
|
|
}
|
|
#endif /* IU_DUMP_CLASS_DESC */
|
|
|
|
/*------------------------------------------------------------------*/
|
|
/*
|
|
* Function irda_usb_find_class_desc(intf)
|
|
*
|
|
* Returns instance of IrDA class descriptor, or NULL if not found
|
|
*
|
|
* The class descriptor is some extra info that IrDA USB devices will
|
|
* offer to us, describing their IrDA characteristics. We will use that in
|
|
* irda_usb_init_qos()
|
|
*/
|
|
static inline struct irda_class_desc *irda_usb_find_class_desc(struct usb_interface *intf)
|
|
{
|
|
struct usb_device *dev = interface_to_usbdev (intf);
|
|
struct irda_class_desc *desc;
|
|
int ret;
|
|
|
|
desc = kmalloc(sizeof (*desc), GFP_KERNEL);
|
|
if (desc == NULL)
|
|
return NULL;
|
|
memset(desc, 0, sizeof(*desc));
|
|
|
|
/* USB-IrDA class spec 1.0:
|
|
* 6.1.3: Standard "Get Descriptor" Device Request is not
|
|
* appropriate to retrieve class-specific descriptor
|
|
* 6.2.5: Class Specific "Get Class Descriptor" Interface Request
|
|
* is mandatory and returns the USB-IrDA class descriptor
|
|
*/
|
|
|
|
ret = usb_control_msg(dev, usb_rcvctrlpipe(dev,0),
|
|
IU_REQ_GET_CLASS_DESC,
|
|
USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
|
|
0, intf->altsetting->desc.bInterfaceNumber, desc,
|
|
sizeof(*desc), 500);
|
|
|
|
IRDA_DEBUG(1, "%s(), ret=%d\n", __FUNCTION__, ret);
|
|
if (ret < sizeof(*desc)) {
|
|
IRDA_WARNING("usb-irda: class_descriptor read %s (%d)\n",
|
|
(ret<0) ? "failed" : "too short", ret);
|
|
}
|
|
else if (desc->bDescriptorType != USB_DT_IRDA) {
|
|
IRDA_WARNING("usb-irda: bad class_descriptor type\n");
|
|
}
|
|
else {
|
|
#ifdef IU_DUMP_CLASS_DESC
|
|
irda_usb_dump_class_desc(desc);
|
|
#endif /* IU_DUMP_CLASS_DESC */
|
|
|
|
return desc;
|
|
}
|
|
kfree(desc);
|
|
return NULL;
|
|
}
|
|
|
|
/*********************** USB DEVICE CALLBACKS ***********************/
|
|
/*
|
|
* Main calls from the USB subsystem.
|
|
* Mostly registering a new irda-usb device and removing it....
|
|
*/
|
|
|
|
/*------------------------------------------------------------------*/
|
|
/*
|
|
* This routine is called by the USB subsystem for each new device
|
|
* in the system. We need to check if the device is ours, and in
|
|
* this case start handling it.
|
|
* The USB layer protect us from reentrancy (via BKL), so we don't need
|
|
* to spinlock in there... Jean II
|
|
*/
|
|
static int irda_usb_probe(struct usb_interface *intf,
|
|
const struct usb_device_id *id)
|
|
{
|
|
struct net_device *net;
|
|
struct usb_device *dev = interface_to_usbdev(intf);
|
|
struct irda_usb_cb *self = NULL;
|
|
struct usb_host_interface *interface;
|
|
struct irda_class_desc *irda_desc;
|
|
int ret = -ENOMEM;
|
|
int i; /* Driver instance index / Rx URB index */
|
|
|
|
/* Note : the probe make sure to call us only for devices that
|
|
* matches the list of dongle (top of the file). So, we
|
|
* don't need to check if the dongle is really ours.
|
|
* Jean II */
|
|
|
|
IRDA_MESSAGE("IRDA-USB found at address %d, Vendor: %x, Product: %x\n",
|
|
dev->devnum, le16_to_cpu(dev->descriptor.idVendor),
|
|
le16_to_cpu(dev->descriptor.idProduct));
|
|
|
|
net = alloc_irdadev(sizeof(*self));
|
|
if (!net)
|
|
goto err_out;
|
|
|
|
SET_MODULE_OWNER(net);
|
|
SET_NETDEV_DEV(net, &intf->dev);
|
|
self = net->priv;
|
|
self->netdev = net;
|
|
spin_lock_init(&self->lock);
|
|
|
|
/* Create all of the needed urbs */
|
|
for (i = 0; i < IU_MAX_RX_URBS; i++) {
|
|
self->rx_urb[i] = usb_alloc_urb(0, GFP_KERNEL);
|
|
if (!self->rx_urb[i]) {
|
|
goto err_out_1;
|
|
}
|
|
}
|
|
self->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
|
|
if (!self->tx_urb) {
|
|
goto err_out_1;
|
|
}
|
|
self->speed_urb = usb_alloc_urb(0, GFP_KERNEL);
|
|
if (!self->speed_urb) {
|
|
goto err_out_2;
|
|
}
|
|
|
|
/* Is this really necessary? (no, except maybe for broken devices) */
|
|
if (usb_reset_configuration (dev) < 0) {
|
|
err("reset_configuration failed");
|
|
ret = -EIO;
|
|
goto err_out_3;
|
|
}
|
|
|
|
/* Is this really necessary? */
|
|
/* Note : some driver do hardcode the interface number, some others
|
|
* specify an alternate, but very few driver do like this.
|
|
* Jean II */
|
|
ret = usb_set_interface(dev, intf->altsetting->desc.bInterfaceNumber, 0);
|
|
IRDA_DEBUG(1, "usb-irda: set interface %d result %d\n", intf->altsetting->desc.bInterfaceNumber, ret);
|
|
switch (ret) {
|
|
case 0:
|
|
break;
|
|
case -EPIPE: /* -EPIPE = -32 */
|
|
/* Martin Diehl says if we get a -EPIPE we should
|
|
* be fine and we don't need to do a usb_clear_halt().
|
|
* - Jean II */
|
|
IRDA_DEBUG(0, "%s(), Received -EPIPE, ignoring...\n", __FUNCTION__);
|
|
break;
|
|
default:
|
|
IRDA_DEBUG(0, "%s(), Unknown error %d\n", __FUNCTION__, ret);
|
|
ret = -EIO;
|
|
goto err_out_3;
|
|
}
|
|
|
|
/* Find our endpoints */
|
|
interface = intf->cur_altsetting;
|
|
if(!irda_usb_parse_endpoints(self, interface->endpoint,
|
|
interface->desc.bNumEndpoints)) {
|
|
IRDA_ERROR("%s(), Bogus endpoints...\n", __FUNCTION__);
|
|
ret = -EIO;
|
|
goto err_out_3;
|
|
}
|
|
|
|
/* Find IrDA class descriptor */
|
|
irda_desc = irda_usb_find_class_desc(intf);
|
|
ret = -ENODEV;
|
|
if (irda_desc == NULL)
|
|
goto err_out_3;
|
|
|
|
self->irda_desc = irda_desc;
|
|
self->present = 1;
|
|
self->netopen = 0;
|
|
self->capability = id->driver_info;
|
|
self->usbdev = dev;
|
|
self->usbintf = intf;
|
|
|
|
/* Allocate the buffer for speed changes */
|
|
/* Don't change this buffer size and allocation without doing
|
|
* some heavy and complete testing. Don't ask why :-(
|
|
* Jean II */
|
|
self->speed_buff = (char *) kmalloc(IRDA_USB_SPEED_MTU, GFP_KERNEL);
|
|
if (self->speed_buff == NULL)
|
|
goto err_out_3;
|
|
|
|
memset(self->speed_buff, 0, IRDA_USB_SPEED_MTU);
|
|
|
|
ret = irda_usb_open(self);
|
|
if (ret)
|
|
goto err_out_4;
|
|
|
|
IRDA_MESSAGE("IrDA: Registered device %s\n", net->name);
|
|
usb_set_intfdata(intf, self);
|
|
return 0;
|
|
|
|
err_out_4:
|
|
kfree(self->speed_buff);
|
|
err_out_3:
|
|
/* Free all urbs that we may have created */
|
|
usb_free_urb(self->speed_urb);
|
|
err_out_2:
|
|
usb_free_urb(self->tx_urb);
|
|
err_out_1:
|
|
for (i = 0; i < IU_MAX_RX_URBS; i++) {
|
|
if (self->rx_urb[i])
|
|
usb_free_urb(self->rx_urb[i]);
|
|
}
|
|
free_netdev(net);
|
|
err_out:
|
|
return ret;
|
|
}
|
|
|
|
/*------------------------------------------------------------------*/
|
|
/*
|
|
* The current irda-usb device is removed, the USB layer tell us
|
|
* to shut it down...
|
|
* One of the constraints is that when we exit this function,
|
|
* we cannot use the usb_device no more. Gone. Destroyed. kfree().
|
|
* Most other subsystem allow you to destroy the instance at a time
|
|
* when it's convenient to you, to postpone it to a later date, but
|
|
* not the USB subsystem.
|
|
* So, we must make bloody sure that everything gets deactivated.
|
|
* Jean II
|
|
*/
|
|
static void irda_usb_disconnect(struct usb_interface *intf)
|
|
{
|
|
unsigned long flags;
|
|
struct irda_usb_cb *self = usb_get_intfdata(intf);
|
|
int i;
|
|
|
|
IRDA_DEBUG(1, "%s()\n", __FUNCTION__);
|
|
|
|
usb_set_intfdata(intf, NULL);
|
|
if (!self)
|
|
return;
|
|
|
|
/* Make sure that the Tx path is not executing. - Jean II */
|
|
spin_lock_irqsave(&self->lock, flags);
|
|
|
|
/* Oups ! We are not there any more.
|
|
* This will stop/desactivate the Tx path. - Jean II */
|
|
self->present = 0;
|
|
|
|
/* We need to have irq enabled to unlink the URBs. That's OK,
|
|
* at this point the Tx path is gone - Jean II */
|
|
spin_unlock_irqrestore(&self->lock, flags);
|
|
|
|
/* Hum... Check if networking is still active (avoid races) */
|
|
if((self->netopen) || (self->irlap)) {
|
|
/* Accept no more transmissions */
|
|
/*netif_device_detach(self->netdev);*/
|
|
netif_stop_queue(self->netdev);
|
|
/* Stop all the receive URBs */
|
|
for (i = 0; i < IU_MAX_RX_URBS; i++)
|
|
usb_kill_urb(self->rx_urb[i]);
|
|
/* Cancel Tx and speed URB.
|
|
* Toggle flags to make sure it's synchronous. */
|
|
self->tx_urb->transfer_flags &= ~URB_ASYNC_UNLINK;
|
|
usb_kill_urb(self->tx_urb);
|
|
self->speed_urb->transfer_flags &= ~URB_ASYNC_UNLINK;
|
|
usb_kill_urb(self->speed_urb);
|
|
}
|
|
|
|
/* Cleanup the device stuff */
|
|
irda_usb_close(self);
|
|
/* No longer attached to USB bus */
|
|
self->usbdev = NULL;
|
|
self->usbintf = NULL;
|
|
|
|
/* Clean up our urbs */
|
|
for (i = 0; i < IU_MAX_RX_URBS; i++)
|
|
usb_free_urb(self->rx_urb[i]);
|
|
/* Clean up Tx and speed URB */
|
|
usb_free_urb(self->tx_urb);
|
|
usb_free_urb(self->speed_urb);
|
|
|
|
/* Free self and network device */
|
|
free_netdev(self->netdev);
|
|
IRDA_DEBUG(0, "%s(), USB IrDA Disconnected\n", __FUNCTION__);
|
|
}
|
|
|
|
/*------------------------------------------------------------------*/
|
|
/*
|
|
* USB device callbacks
|
|
*/
|
|
static struct usb_driver irda_driver = {
|
|
.owner = THIS_MODULE,
|
|
.name = "irda-usb",
|
|
.probe = irda_usb_probe,
|
|
.disconnect = irda_usb_disconnect,
|
|
.id_table = dongles,
|
|
};
|
|
|
|
/************************* MODULE CALLBACKS *************************/
|
|
/*
|
|
* Deal with module insertion/removal
|
|
* Mostly tell USB about our existence
|
|
*/
|
|
|
|
/*------------------------------------------------------------------*/
|
|
/*
|
|
* Module insertion
|
|
*/
|
|
static int __init usb_irda_init(void)
|
|
{
|
|
int ret;
|
|
|
|
ret = usb_register(&irda_driver);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
IRDA_MESSAGE("USB IrDA support registered\n");
|
|
return 0;
|
|
}
|
|
module_init(usb_irda_init);
|
|
|
|
/*------------------------------------------------------------------*/
|
|
/*
|
|
* Module removal
|
|
*/
|
|
static void __exit usb_irda_cleanup(void)
|
|
{
|
|
/* Deregister the driver and remove all pending instances */
|
|
usb_deregister(&irda_driver);
|
|
}
|
|
module_exit(usb_irda_cleanup);
|
|
|
|
/*------------------------------------------------------------------*/
|
|
/*
|
|
* Module parameters
|
|
*/
|
|
module_param(qos_mtt_bits, int, 0);
|
|
MODULE_PARM_DESC(qos_mtt_bits, "Minimum Turn Time");
|
|
MODULE_AUTHOR("Roman Weissgaerber <weissg@vienna.at>, Dag Brattli <dag@brattli.net> and Jean Tourrilhes <jt@hpl.hp.com>");
|
|
MODULE_DESCRIPTION("IrDA-USB Dongle Driver");
|
|
MODULE_LICENSE("GPL");
|