| /***************************************************************************** |
| * |
| * Filename: irda-usb.c |
| * Version: 0.10 |
| * Description: IrDA-USB Driver |
| * Status: Experimental |
| * Author: Dag Brattli <dag@brattli.net> |
| * |
| * Copyright (C) 2000, Roman Weissgaerber <weissg@vienna.at> |
| * Copyright (C) 2001, 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 |
| * 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. |
| * |
| *****************************************************************************/ |
| |
| /* |
| * IMPORTANT NOTE |
| * -------------- |
| * |
| * As of kernel 2.5.20, this is the state of compliance and testing of |
| * this driver (irda-usb) with regards to the USB low level drivers... |
| * |
| * This driver has been tested SUCCESSFULLY with the following drivers : |
| * o usb-uhci-hcd (For Intel/Via USB controllers) |
| * o uhci-hcd (Alternate/JE driver for Intel/Via USB controllers) |
| * o ohci-hcd (For other USB controllers) |
| * |
| * This driver has NOT been tested with the following drivers : |
| * o ehci-hcd (USB 2.0 controllers) |
| * |
| * Note that all HCD drivers do URB_ZERO_PACKET and timeout properly, |
| * so we don't have to worry about that anymore. |
| * One common problem is the failure to set the address on the dongle, |
| * but this happens before the driver gets loaded... |
| * |
| * Jean II |
| */ |
| |
| /*------------------------------------------------------------------*/ |
| |
| #include <linux/module.h> |
| #include <linux/moduleparam.h> |
| #include <linux/kernel.h> |
| #include <linux/types.h> |
| #include <linux/init.h> |
| #include <linux/skbuff.h> |
| #include <linux/netdevice.h> |
| #include <linux/slab.h> |
| #include <linux/rtnetlink.h> |
| #include <linux/usb.h> |
| #include <linux/firmware.h> |
| |
| #include "irda-usb.h" |
| |
| /*------------------------------------------------------------------*/ |
| |
| static int qos_mtt_bits = 0; |
| |
| /* These are the currently known IrDA USB dongles. Add new dongles here */ |
| static struct usb_device_id dongles[] = { |
| /* ACTiSYS Corp., ACT-IR2000U FIR-USB Adapter */ |
| { USB_DEVICE(0x9c4, 0x011), .driver_info = IUC_SPEED_BUG | IUC_NO_WINDOW }, |
| /* Look like ACTiSYS, Report : IBM Corp., IBM UltraPort IrDA */ |
| { USB_DEVICE(0x4428, 0x012), .driver_info = IUC_SPEED_BUG | IUC_NO_WINDOW }, |
| /* KC Technology Inc., KC-180 USB IrDA Device */ |
| { USB_DEVICE(0x50f, 0x180), .driver_info = IUC_SPEED_BUG | IUC_NO_WINDOW }, |
| /* Extended Systems, Inc., XTNDAccess IrDA USB (ESI-9685) */ |
| { USB_DEVICE(0x8e9, 0x100), .driver_info = IUC_SPEED_BUG | IUC_NO_WINDOW }, |
| /* SigmaTel STIR4210/4220/4116 USB IrDA (VFIR) Bridge */ |
| { USB_DEVICE(0x66f, 0x4210), .driver_info = IUC_STIR421X | IUC_SPEED_BUG }, |
| { USB_DEVICE(0x66f, 0x4220), .driver_info = IUC_STIR421X | IUC_SPEED_BUG }, |
| { USB_DEVICE(0x66f, 0x4116), .driver_info = IUC_STIR421X | IUC_SPEED_BUG }, |
| { .match_flags = USB_DEVICE_ID_MATCH_INT_CLASS | |
| USB_DEVICE_ID_MATCH_INT_SUBCLASS, |
| .bInterfaceClass = USB_CLASS_APP_SPEC, |
| .bInterfaceSubClass = USB_CLASS_IRDA, |
| .driver_info = IUC_DEFAULT, }, |
| { }, /* The end */ |
| }; |
| |
| /* |
| * Important note : |
| * Devices based on the SigmaTel chipset (0x66f, 0x4200) are not designed |
| * using the "USB-IrDA specification" (yes, there exist such a thing), and |
| * therefore not supported by this driver (don't add them above). |
| * There is a Linux driver, stir4200, that support those USB devices. |
| * Jean II |
| */ |
| |
| MODULE_DEVICE_TABLE(usb, dongles); |
| |
| /*------------------------------------------------------------------*/ |
| |
| static void irda_usb_init_qos(struct irda_usb_cb *self) ; |
| static struct irda_class_desc *irda_usb_find_class_desc(struct usb_interface *intf); |
| static void irda_usb_disconnect(struct usb_interface *intf); |
| static void irda_usb_change_speed_xbofs(struct irda_usb_cb *self); |
| static int irda_usb_hard_xmit(struct sk_buff *skb, struct net_device *dev); |
| static int irda_usb_open(struct irda_usb_cb *self); |
| static void irda_usb_close(struct irda_usb_cb *self); |
| static void speed_bulk_callback(struct urb *urb); |
| static void write_bulk_callback(struct urb *urb); |
| static void irda_usb_receive(struct urb *urb); |
| static void irda_usb_rx_defer_expired(unsigned long data); |
| static int irda_usb_net_open(struct net_device *dev); |
| static int irda_usb_net_close(struct net_device *dev); |
| static int irda_usb_net_ioctl(struct net_device *dev, struct ifreq *rq, int cmd); |
| static void irda_usb_net_timeout(struct net_device *dev); |
| static struct net_device_stats *irda_usb_net_get_stats(struct net_device *dev); |
| |
| /************************ TRANSMIT ROUTINES ************************/ |
| /* |
| * Receive packets from the IrDA stack and send them on the USB pipe. |
| * Handle speed change, timeout and lot's of ugliness... |
| */ |
| |
| /*------------------------------------------------------------------*/ |
| /* |
| * Function irda_usb_build_header(self, skb, header) |
| * |
| * Builds USB-IrDA outbound header |
| * |
| * When we send an IrDA frame over an USB pipe, we add to it a 1 byte |
| * header. This function create this header with the proper values. |
| * |
| * Important note : the USB-IrDA spec 1.0 say very clearly in chapter 5.4.2.2 |
| * that the setting of the link speed and xbof number in this outbound header |
| * should be applied *AFTER* the frame has been sent. |
| * Unfortunately, some devices are not compliant with that... It seems that |
| * reading the spec is far too difficult... |
| * Jean II |
| */ |
| static void irda_usb_build_header(struct irda_usb_cb *self, |
| __u8 *header, |
| int force) |
| { |
| /* Here we check if we have an STIR421x chip, |
| * and if either speed or xbofs (or both) needs |
| * to be changed. |
| */ |
| if (self->capability & IUC_STIR421X && |
| ((self->new_speed != -1) || (self->new_xbofs != -1))) { |
| |
| /* With STIR421x, speed and xBOFs must be set at the same |
| * time, even if only one of them changes. |
| */ |
| if (self->new_speed == -1) |
| self->new_speed = self->speed ; |
| |
| if (self->new_xbofs == -1) |
| self->new_xbofs = self->xbofs ; |
| } |
| |
| /* Set the link speed */ |
| if (self->new_speed != -1) { |
| /* Hum... Ugly hack :-( |
| * Some device are not compliant with the spec and change |
| * parameters *before* sending the frame. - Jean II |
| */ |
| if ((self->capability & IUC_SPEED_BUG) && |
| (!force) && (self->speed != -1)) { |
| /* No speed and xbofs change here |
| * (we'll do it later in the write callback) */ |
| IRDA_DEBUG(2, "%s(), not changing speed yet\n", __FUNCTION__); |
| *header = 0; |
| return; |
| } |
| |
| IRDA_DEBUG(2, "%s(), changing speed to %d\n", __FUNCTION__, self->new_speed); |
| self->speed = self->new_speed; |
| /* We will do ` self->new_speed = -1; ' in the completion |
| * handler just in case the current URB fail - Jean II */ |
| |
| switch (self->speed) { |
| case 2400: |
| *header = SPEED_2400; |
| break; |
| default: |
| case 9600: |
| *header = SPEED_9600; |
| break; |
| case 19200: |
| *header = SPEED_19200; |
| break; |
| case 38400: |
| *header = SPEED_38400; |
| break; |
| case 57600: |
| *header = SPEED_57600; |
| break; |
| case 115200: |
| *header = SPEED_115200; |
| break; |
| case 576000: |
| *header = SPEED_576000; |
| break; |
| case 1152000: |
| *header = SPEED_1152000; |
| break; |
| case 4000000: |
| *header = SPEED_4000000; |
| self->new_xbofs = 0; |
| break; |
| case 16000000: |
| *header = SPEED_16000000; |
| self->new_xbofs = 0; |
| break; |
| } |
| } else |
| /* No change */ |
| *header = 0; |
| |
| /* Set the negotiated additional XBOFS */ |
| if (self->new_xbofs != -1) { |
| IRDA_DEBUG(2, "%s(), changing xbofs to %d\n", __FUNCTION__, self->new_xbofs); |
| self->xbofs = self->new_xbofs; |
| /* We will do ` self->new_xbofs = -1; ' in the completion |
| * handler just in case the current URB fail - Jean II */ |
| |
| switch (self->xbofs) { |
| case 48: |
| *header |= 0x10; |
| break; |
| case 28: |
| case 24: /* USB spec 1.0 says 24 */ |
| *header |= 0x20; |
| break; |
| default: |
| case 12: |
| *header |= 0x30; |
| break; |
| case 5: /* Bug in IrLAP spec? (should be 6) */ |
| case 6: |
| *header |= 0x40; |
| break; |
| case 3: |
| *header |= 0x50; |
| break; |
| case 2: |
| *header |= 0x60; |
| break; |
| case 1: |
| *header |= 0x70; |
| break; |
| case 0: |
| *header |= 0x80; |
| break; |
| } |
| } |
| } |
| |
| /* |
| * calculate turnaround time for SigmaTel header |
| */ |
| static __u8 get_turnaround_time(struct sk_buff *skb) |
| { |
| int turnaround_time = irda_get_mtt(skb); |
| |
| if ( turnaround_time == 0 ) |
| return 0; |
| else if ( turnaround_time <= 10 ) |
| return 1; |
| else if ( turnaround_time <= 50 ) |
| return 2; |
| else if ( turnaround_time <= 100 ) |
| return 3; |
| else if ( turnaround_time <= 500 ) |
| return 4; |
| else if ( turnaround_time <= 1000 ) |
| return 5; |
| else if ( turnaround_time <= 5000 ) |
| return 6; |
| else |
| return 7; |
| } |
| |
| |
| /*------------------------------------------------------------------*/ |
| /* |
| * Send a command to change the speed of the dongle |
| * Need to be called with spinlock on. |
| */ |
| static void irda_usb_change_speed_xbofs(struct irda_usb_cb *self) |
| { |
| __u8 *frame; |
| struct urb *urb; |
| int ret; |
| |
| IRDA_DEBUG(2, "%s(), speed=%d, xbofs=%d\n", __FUNCTION__, |
| self->new_speed, self->new_xbofs); |
| |
| /* Grab the speed URB */ |
| urb = self->speed_urb; |
| if (urb->status != 0) { |
| IRDA_WARNING("%s(), URB still in use!\n", __FUNCTION__); |
| return; |
| } |
| |
| /* Allocate the fake frame */ |
| frame = self->speed_buff; |
| |
| /* Set the new speed and xbofs in this fake frame */ |
| irda_usb_build_header(self, frame, 1); |
| |
| if (self->capability & IUC_STIR421X) { |
| if (frame[0] == 0) return ; // do nothing if no change |
| frame[1] = 0; // other parameters don't change here |
| frame[2] = 0; |
| } |
| |
| /* Submit the 0 length IrDA frame to trigger new speed settings */ |
| usb_fill_bulk_urb(urb, self->usbdev, |
| usb_sndbulkpipe(self->usbdev, self->bulk_out_ep), |
| frame, IRDA_USB_SPEED_MTU, |
| speed_bulk_callback, self); |
| urb->transfer_buffer_length = self->header_length; |
| urb->transfer_flags = 0; |
| |
| /* Irq disabled -> GFP_ATOMIC */ |
| if ((ret = usb_submit_urb(urb, GFP_ATOMIC))) { |
| IRDA_WARNING("%s(), failed Speed URB\n", __FUNCTION__); |
| } |
| } |
| |
| /*------------------------------------------------------------------*/ |
| /* |
| * Speed URB callback |
| * Now, we can only get called for the speed URB. |
| */ |
| static void speed_bulk_callback(struct urb *urb) |
| { |
| struct irda_usb_cb *self = urb->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->speed_urb, return;); |
| |
| /* 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. |
| * 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 |
| |
| /* New speed and xbof is now commited in hardware */ |
| self->new_speed = -1; |
| self->new_xbofs = -1; |
| |
| /* Allow the stack to send more packets */ |
| netif_wake_queue(self->netdev); |
| } |
| |
| /*------------------------------------------------------------------*/ |
| /* |
| * Send an IrDA frame to the USB dongle (for transmission) |
| */ |
| static int irda_usb_hard_xmit(struct sk_buff *skb, struct net_device *netdev) |
| { |
| struct irda_usb_cb *self = netdev->priv; |
| struct urb *urb = self->tx_urb; |
| unsigned long flags; |
| s32 speed; |
| s16 xbofs; |
| int res, mtt; |
| int err = 1; /* Failed */ |
| |
| IRDA_DEBUG(4, "%s() on %s\n", __FUNCTION__, netdev->name); |
| |
| netif_stop_queue(netdev); |
| |
| /* Protect us from USB callbacks, net watchdog and else. */ |
| spin_lock_irqsave(&self->lock, flags); |
| |
| /* Check if the device is still there. |
| * We need to check self->present under the spinlock because |
| * of irda_usb_disconnect() is synchronous - Jean II */ |
| if (!self->present) { |
| IRDA_DEBUG(0, "%s(), Device is gone...\n", __FUNCTION__); |
| goto drop; |
| } |
| |
| /* Check if we need to change the number of xbofs */ |
| xbofs = irda_get_next_xbofs(skb); |
| if ((xbofs != self->xbofs) && (xbofs != -1)) { |
| self->new_xbofs = xbofs; |
| } |
| |
| /* Check if we need to change the speed */ |
| speed = irda_get_next_speed(skb); |
| if ((speed != self->speed) && (speed != -1)) { |
| /* Set the desired speed */ |
| self->new_speed = speed; |
| |
| /* Check for empty frame */ |
| if (!skb->len) { |
| /* IrLAP send us an empty frame to make us change the |
| * speed. Changing speed with the USB adapter is in |
| * fact sending an empty frame to the adapter, so we |
| * could just let the present function do its job. |
| * However, we would wait for min turn time, |
| * do an extra memcpy and increment packet counters... |
| * Jean II */ |
| irda_usb_change_speed_xbofs(self); |
| netdev->trans_start = jiffies; |
| /* Will netif_wake_queue() in callback */ |
| err = 0; /* No error */ |
| goto drop; |
| } |
| } |
| |
| if (urb->status != 0) { |
| IRDA_WARNING("%s(), URB still in use!\n", __FUNCTION__); |
| goto drop; |
| } |
| |
| /* Make sure there is room for IrDA-USB header. The actual |
| * allocation will be done lower in skb_push(). |
| * Also, we don't use directly skb_cow(), because it require |
| * headroom >= 16, which force unnecessary copies - Jean II */ |
| if (skb_headroom(skb) < self->header_length) { |
| IRDA_DEBUG(0, "%s(), Insuficient skb headroom.\n", __FUNCTION__); |
| if (skb_cow(skb, self->header_length)) { |
| IRDA_WARNING("%s(), failed skb_cow() !!!\n", __FUNCTION__); |
| goto drop; |
| } |
| } |
| |
| /* Change setting for next frame */ |
| |
| if (self->capability & IUC_STIR421X) { |
| __u8 turnaround_time; |
| __u8* frame; |
| turnaround_time = get_turnaround_time( skb ); |
| frame= skb_push(skb, self->header_length); |
| irda_usb_build_header(self, frame, 0); |
| frame[2] = turnaround_time; |
| if ((skb->len != 0) && |
| ((skb->len % 128) == 0) && |
| ((skb->len % 512) != 0)) { |
| /* add extra byte for special SigmaTel feature */ |
| frame[1] = 1; |
| skb_put(skb, 1); |
| } else { |
| frame[1] = 0; |
| } |
| } else { |
| irda_usb_build_header(self, skb_push(skb, self->header_length), 0); |
| } |
| |
| /* FIXME: Make macro out of this one */ |
| ((struct irda_skb_cb *)skb->cb)->context = self; |
| |
| usb_fill_bulk_urb(urb, self->usbdev, |
| usb_sndbulkpipe(self->usbdev, self->bulk_out_ep), |
| skb->data, IRDA_SKB_MAX_MTU, |
| write_bulk_callback, skb); |
| urb->transfer_buffer_length = skb->len; |
| /* 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) |
| { |
| 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 -ECONNRESET: |
| case -ENOENT: /* 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... |
| * Jean II */ |
| done = 1; |
| break; |
| case -ECONNRESET: |
| case -ENOENT: /* 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 |
| * |
| * Note : don't read the above as what we are currently doing, but as |
| * something we could do with KC dongle. Also don't forget that the |
| * interrupt pipe is not part of the original standard, so this would |
| * need to be optional... |
| * 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, IRDA_SKB_MAX_MTU, |
| irda_usb_receive, skb); |
| 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 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; |
| struct urb *next_urb; |
| unsigned int len, 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_crc_errors++; |
| /* Also precursor to a hot-unplug on UHCI. */ |
| /* Fallthrough... */ |
| case -ECONNRESET: |
| /* Random error, if I remember correctly */ |
| /* 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 */ |
| case -ESHUTDOWN: |
| /* That's usually a hot-unplug. Submit will fail... */ |
| case -ETIME: |
| /* Usually precursor to a hot-unplug on OHCI. */ |
| default: |
| self->stats.rx_errors++; |
| IRDA_DEBUG(0, "%s(), RX status %d, transfer_flags 0x%04X \n", __FUNCTION__, urb->status, urb->transfer_flags); |
| break; |
| } |
| /* If we received an error, we don't want to resubmit the |
| * Rx URB straight away but to give the USB layer a little |
| * bit of breathing room. |
| * We are in the USB thread context, therefore there is a |
| * danger of recursion (new URB we submit fails, we come |
| * back here). |
| * With recent USB stack (2.6.15+), I'm seeing that on |
| * hot unplug of the dongle... |
| * Lowest effective timer is 10ms... |
| * Jean II */ |
| self->rx_defer_timer.function = &irda_usb_rx_defer_expired; |
| self->rx_defer_timer.data = (unsigned long) urb; |
| mod_timer(&self->rx_defer_timer, jiffies + (10 * HZ / 1000)); |
| return; |
| } |
| |
| /* Check for empty frames */ |
| if (urb->actual_length <= self->header_length) { |
| 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 */ |
| if (self->capability & IUC_STIR421X) |
| newskb = dev_alloc_skb(docopy ? urb->actual_length : |
| IRDA_SKB_MAX_MTU + |
| USB_IRDA_STIR421X_HEADER); |
| else |
| 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, self->header_length); |
| |
| /* 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); |
| len = dataskb->len; |
| netif_rx(dataskb); |
| |
| /* Keep stats up to date */ |
| self->stats.rx_bytes += 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. I don't think it would buy us anything as |
| * we are running in the USB thread context. Jean II */ |
| next_urb = self->idle_rx_urb; |
| |
| /* Recycle Rx URB : Now, the idle URB is the present one */ |
| urb->context = NULL; |
| self->idle_rx_urb = urb; |
| |
| /* Submit the idle URB to replace the URB we've just received. |
| * Do it last to avoid race conditions... Jean II */ |
| irda_usb_submit(self, skb, next_urb); |
| } |
| |
| /*------------------------------------------------------------------*/ |
| /* |
| * In case of errors, we want the USB layer to have time to recover. |
| * Now, it is time to resubmit ouur Rx URB... |
| */ |
| static void irda_usb_rx_defer_expired(unsigned long data) |
| { |
| struct urb *urb = (struct urb *) data; |
| struct sk_buff *skb = (struct sk_buff *) urb->context; |
| struct irda_usb_cb *self; |
| struct irda_skb_cb *cb; |
| struct urb *next_urb; |
| |
| IRDA_DEBUG(2, "%s()\n", __FUNCTION__); |
| |
| /* 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;); |
| |
| /* Same stuff as when Rx is done, see above... */ |
| next_urb = self->idle_rx_urb; |
| urb->context = NULL; |
| self->idle_rx_urb = urb; |
| irda_usb_submit(self, skb, next_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 */ |
| } |
| |
| #define STIR421X_PATCH_PRODUCT_VER "Product Version: " |
| #define STIR421X_PATCH_STMP_TAG "STMP" |
| #define STIR421X_PATCH_CODE_OFFSET 512 /* patch image starts before here */ |
| /* marks end of patch file header (PC DOS text file EOF character) */ |
| #define STIR421X_PATCH_END_OF_HDR_TAG 0x1A |
| #define STIR421X_PATCH_BLOCK_SIZE 1023 |
| |
| /* |
| * Function stir421x_fwupload (struct irda_usb_cb *self, |
| * unsigned char *patch, |
| * const unsigned int patch_len) |
| * |
| * Upload firmware code to SigmaTel 421X IRDA-USB dongle |
| */ |
| static int stir421x_fw_upload(struct irda_usb_cb *self, |
| unsigned char *patch, |
| const unsigned int patch_len) |
| { |
| int ret = -ENOMEM; |
| int actual_len = 0; |
| unsigned int i; |
| unsigned int block_size = 0; |
| unsigned char *patch_block; |
| |
| patch_block = kzalloc(STIR421X_PATCH_BLOCK_SIZE, GFP_KERNEL); |
| if (patch_block == NULL) |
| return -ENOMEM; |
| |
| /* break up patch into 1023-byte sections */ |
| for (i = 0; i < patch_len; i += block_size) { |
| block_size = patch_len - i; |
| |
| if (block_size > STIR421X_PATCH_BLOCK_SIZE) |
| block_size = STIR421X_PATCH_BLOCK_SIZE; |
| |
| /* upload the patch section */ |
| memcpy(patch_block, patch + i, block_size); |
| |
| ret = usb_bulk_msg(self->usbdev, |
| usb_sndbulkpipe(self->usbdev, |
| self->bulk_out_ep), |
| patch_block, block_size, |
| &actual_len, msecs_to_jiffies(500)); |
| IRDA_DEBUG(3,"%s(): Bulk send %u bytes, ret=%d\n", |
| __FUNCTION__, actual_len, ret); |
| |
| if (ret < 0) |
| break; |
| } |
| |
| kfree(patch_block); |
| |
| return ret; |
| } |
| |
| /* |
| * Function stir421x_patch_device(struct irda_usb_cb *self) |
| * |
| * Get a firmware code from userspase using hotplug request_firmware() call |
| */ |
| static int stir421x_patch_device(struct irda_usb_cb *self) |
| { |
| unsigned int i; |
| int ret; |
| char stir421x_fw_name[11]; |
| const struct firmware *fw; |
| unsigned char *fw_version_ptr; /* pointer to version string */ |
| unsigned long fw_version = 0; |
| |
| /* |
| * Known firmware patch file names for STIR421x dongles |
| * are "42101001.sb" or "42101002.sb" |
| */ |
| sprintf(stir421x_fw_name, "4210%4X.sb", |
| self->usbdev->descriptor.bcdDevice); |
| ret = request_firmware(&fw, stir421x_fw_name, &self->usbdev->dev); |
| if (ret < 0) |
| return ret; |
| |
| /* We get a patch from userspace */ |
| IRDA_MESSAGE("%s(): Received firmware %s (%zu bytes)\n", |
| __FUNCTION__, stir421x_fw_name, fw->size); |
| |
| ret = -EINVAL; |
| |
| /* Get the bcd product version */ |
| if (!memcmp(fw->data, STIR421X_PATCH_PRODUCT_VER, |
| sizeof(STIR421X_PATCH_PRODUCT_VER) - 1)) { |
| fw_version_ptr = fw->data + |
| sizeof(STIR421X_PATCH_PRODUCT_VER) - 1; |
| |
| /* Let's check if the product version is dotted */ |
| if (fw_version_ptr[3] == '.' && |
| fw_version_ptr[7] == '.') { |
| unsigned long major, minor, build; |
| major = simple_strtoul(fw_version_ptr, NULL, 10); |
| minor = simple_strtoul(fw_version_ptr + 4, NULL, 10); |
| build = simple_strtoul(fw_version_ptr + 8, NULL, 10); |
| |
| fw_version = (major << 12) |
| + (minor << 8) |
| + ((build / 10) << 4) |
| + (build % 10); |
| |
| IRDA_DEBUG(3, "%s(): Firmware Product version %ld\n", |
| __FUNCTION__, fw_version); |
| } |
| } |
| |
| if (self->usbdev->descriptor.bcdDevice == fw_version) { |
| /* |
| * If we're here, we've found a correct patch |
| * The actual image starts after the "STMP" keyword |
| * so forward to the firmware header tag |
| */ |
| for (i = 0; (fw->data[i] != STIR421X_PATCH_END_OF_HDR_TAG) |
| && (i < fw->size); i++) ; |
| /* here we check for the out of buffer case */ |
| if ((STIR421X_PATCH_END_OF_HDR_TAG == fw->data[i]) |
| && (i < STIR421X_PATCH_CODE_OFFSET)) { |
| if (!memcmp(fw->data + i + 1, STIR421X_PATCH_STMP_TAG, |
| sizeof(STIR421X_PATCH_STMP_TAG) - 1)) { |
| |
| /* We can upload the patch to the target */ |
| i += sizeof(STIR421X_PATCH_STMP_TAG); |
| ret = stir421x_fw_upload(self, &fw->data[i], |
| fw->size - i); |
| } |
| } |
| } |
| |
| release_firmware(fw); |
| |
| return ret; |
| } |
| |
| |
| /********************** 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; |
| } |
| |
| if(self->needspatch) { |
| IRDA_WARNING("%s(), device needs patch\n", __FUNCTION__) ; |
| return -EIO ; |
| } |
| |
| /* 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); |
| |
| /* Kill defered Rx URB */ |
| del_timer(&self->rx_defer_timer); |
| |
| /* Deallocate all the Rx path buffers (URBs and skb) */ |
| for (i = 0; i < self->max_rx_urb; 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 */ |
| usb_kill_urb(self->tx_urb); |
| 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 */ |
| 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); |
| init_timer(&self->rx_defer_timer); |
| |
| self->capability = id->driver_info; |
| self->needspatch = ((self->capability & IUC_STIR421X) != 0); |
| |
| /* Create all of the needed urbs */ |
| if (self->capability & IUC_STIR421X) { |
| self->max_rx_urb = IU_SIGMATEL_MAX_RX_URBS; |
| self->header_length = USB_IRDA_STIR421X_HEADER; |
| } else { |
| self->max_rx_urb = IU_MAX_RX_URBS; |
| self->header_length = USB_IRDA_HEADER; |
| } |
| |
| self->rx_urb = kzalloc(self->max_rx_urb * sizeof(struct urb *), |
| GFP_KERNEL); |
| |
| for (i = 0; i < self->max_rx_urb; 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; |
| } |
| |
| self->usbdev = dev; |
| |
| /* Find IrDA class descriptor */ |
| irda_desc = irda_usb_find_class_desc(intf); |
| ret = -ENODEV; |
| if (irda_desc == NULL) |
| goto err_out_3; |
| |
| if (self->needspatch) { |
| ret = usb_control_msg (self->usbdev, usb_sndctrlpipe (self->usbdev, 0), |
| 0x02, 0x40, 0, 0, NULL, 0, 500); |
| if (ret < 0) { |
| IRDA_DEBUG (0, "usb_control_msg failed %d\n", ret); |
| goto err_out_3; |
| } else { |
| mdelay(10); |
| } |
| } |
| |
| self->irda_desc = irda_desc; |
| self->present = 1; |
| self->netopen = 0; |
| 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 = 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); |
| |
| if (self->needspatch) { |
| /* Now we fetch and upload the firmware patch */ |
| ret = stir421x_patch_device(self); |
| self->needspatch = (ret < 0); |
| if (self->needspatch) { |
| IRDA_ERROR("STIR421X: Couldn't upload patch\n"); |
| goto err_out_5; |
| } |
| |
| /* replace IrDA class descriptor with what patched device is now reporting */ |
| irda_desc = irda_usb_find_class_desc (self->usbintf); |
| if (irda_desc == NULL) { |
| ret = -ENODEV; |
| goto err_out_5; |
| } |
| if (self->irda_desc) |
| kfree (self->irda_desc); |
| self->irda_desc = irda_desc; |
| irda_usb_init_qos(self); |
| } |
| |
| return 0; |
| |
| err_out_5: |
| unregister_netdev(self->netdev); |
| 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 < self->max_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; |
| |
| /* Kill defered Rx URB */ |
| del_timer(&self->rx_defer_timer); |
| |
| /* 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. Must be synchronous. */ |
| for (i = 0; i < self->max_rx_urb; i++) |
| usb_kill_urb(self->rx_urb[i]); |
| /* Cancel Tx and speed URB. |
| * Make sure it's synchronous to avoid races. */ |
| usb_kill_urb(self->tx_urb); |
| 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 < self->max_rx_urb; i++) |
| usb_free_urb(self->rx_urb[i]); |
| kfree(self->rx_urb); |
| /* 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 = { |
| .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>, Jean Tourrilhes <jt@hpl.hp.com> and Nick Fedchik <nick@fedchik.org.ua>"); |
| MODULE_DESCRIPTION("IrDA-USB Dongle Driver"); |
| MODULE_LICENSE("GPL"); |