/***************************************************************************** * * Filename: ksdazzle.c * Version: 0.1.2 * Description: Irda KingSun Dazzle USB Dongle * Status: Experimental * Author: Alex Villacís Lasso <a_villacis@palosanto.com> * * Based on stir4200, mcs7780, kingsun-sir drivers. * * 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. * * 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. * *****************************************************************************/ /* * Following is my most current (2007-07-26) understanding of how the Kingsun * 07D0:4100 dongle (sometimes known as the MA-660) is supposed to work. This * information was deduced by examining the USB traffic captured with USBSnoopy * from the WinXP driver. Feel free to update here as more of the dongle is * known. * * General: This dongle exposes one interface with two interrupt endpoints, one * IN and one OUT. In this regard, it is similar to what the Kingsun/Donshine * dongle (07c0:4200) exposes. Traffic is raw and needs to be wrapped and * unwrapped manually as in stir4200, kingsun-sir, and ks959-sir. * * Transmission: To transmit an IrDA frame, it is necessary to wrap it, then * split it into multiple segments of up to 7 bytes each, and transmit each in * sequence. It seems that sending a single big block (like kingsun-sir does) * won't work with this dongle. Each segment needs to be prefixed with a value * equal to (unsigned char)0xF8 + <number of bytes in segment>, inside a payload * of exactly 8 bytes. For example, a segment of 1 byte gets prefixed by 0xF9, * and one of 7 bytes gets prefixed by 0xFF. The bytes at the end of the * payload, not considered by the prefix, are ignored (set to 0 by this * implementation). * * Reception: To receive data, the driver must poll the dongle regularly (like * kingsun-sir.c) with interrupt URBs. If data is available, it will be returned * in payloads from 0 to 8 bytes long. When concatenated, these payloads form * a raw IrDA stream that needs to be unwrapped as in stir4200 and kingsun-sir * * Speed change: To change the speed of the dongle, the driver prepares a * control URB with the following as a setup packet: * bRequestType USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE * bRequest 0x09 * wValue 0x0200 * wIndex 0x0001 * wLength 0x0008 (length of the payload) * The payload is a 8-byte record, apparently identical to the one used in * drivers/usb/serial/cypress_m8.c to change speed: * __u32 baudSpeed; * unsigned int dataBits : 2; // 0 - 5 bits 3 - 8 bits * unsigned int : 1; * unsigned int stopBits : 1; * unsigned int parityEnable : 1; * unsigned int parityType : 1; * unsigned int : 1; * unsigned int reset : 1; * unsigned char reserved[3]; // set to 0 * * For now only SIR speeds have been observed with this dongle. Therefore, * nothing is known on what changes (if any) must be done to frame wrapping / * unwrapping for higher than SIR speeds. This driver assumes no change is * necessary and announces support for all the way to 115200 bps. */ #include <linux/module.h> #include <linux/moduleparam.h> #include <linux/kernel.h> #include <linux/types.h> #include <linux/errno.h> #include <linux/init.h> #include <linux/slab.h> #include <linux/module.h> #include <linux/kref.h> #include <linux/usb.h> #include <linux/device.h> #include <linux/crc32.h> #include <asm/unaligned.h> #include <asm/byteorder.h> #include <asm/uaccess.h> #include <net/irda/irda.h> #include <net/irda/wrapper.h> #include <net/irda/crc.h> #define KSDAZZLE_VENDOR_ID 0x07d0 #define KSDAZZLE_PRODUCT_ID 0x4100 /* These are the currently known USB ids */ static struct usb_device_id dongles[] = { /* KingSun Co,Ltd IrDA/USB Bridge */ {USB_DEVICE(KSDAZZLE_VENDOR_ID, KSDAZZLE_PRODUCT_ID)}, {} }; MODULE_DEVICE_TABLE(usb, dongles); #define KINGSUN_MTT 0x07 #define KINGSUN_REQ_RECV 0x01 #define KINGSUN_REQ_SEND 0x09 #define KINGSUN_SND_FIFO_SIZE 2048 /* Max packet we can send */ #define KINGSUN_RCV_MAX 2048 /* Max transfer we can receive */ struct ksdazzle_speedparams { __le32 baudrate; /* baud rate, little endian */ __u8 flags; __u8 reserved[3]; } __attribute__ ((packed)); #define KS_DATA_5_BITS 0x00 #define KS_DATA_6_BITS 0x01 #define KS_DATA_7_BITS 0x02 #define KS_DATA_8_BITS 0x03 #define KS_STOP_BITS_1 0x00 #define KS_STOP_BITS_2 0x08 #define KS_PAR_DISABLE 0x00 #define KS_PAR_EVEN 0x10 #define KS_PAR_ODD 0x30 #define KS_RESET 0x80 #define KINGSUN_EP_IN 0 #define KINGSUN_EP_OUT 1 struct ksdazzle_cb { struct usb_device *usbdev; /* init: probe_irda */ struct net_device *netdev; /* network layer */ struct irlap_cb *irlap; /* The link layer we are binded to */ struct net_device_stats stats; /* network statistics */ struct qos_info qos; struct urb *tx_urb; __u8 *tx_buf_clear; unsigned int tx_buf_clear_used; unsigned int tx_buf_clear_sent; __u8 tx_payload[8]; struct urb *rx_urb; __u8 *rx_buf; iobuff_t rx_unwrap_buff; struct usb_ctrlrequest *speed_setuprequest; struct urb *speed_urb; struct ksdazzle_speedparams speedparams; unsigned int new_speed; __u8 ep_in; __u8 ep_out; spinlock_t lock; int receiving; }; /* Callback transmission routine */ static void ksdazzle_speed_irq(struct urb *urb) { /* unlink, shutdown, unplug, other nasties */ if (urb->status != 0) { err("ksdazzle_speed_irq: urb asynchronously failed - %d", urb->status); } } /* Send a control request to change speed of the dongle */ static int ksdazzle_change_speed(struct ksdazzle_cb *kingsun, unsigned speed) { static unsigned int supported_speeds[] = { 2400, 9600, 19200, 38400, 57600, 115200, 576000, 1152000, 4000000, 0 }; int err; unsigned int i; if (kingsun->speed_setuprequest == NULL || kingsun->speed_urb == NULL) return -ENOMEM; /* Check that requested speed is among the supported ones */ for (i = 0; supported_speeds[i] && supported_speeds[i] != speed; i++) ; if (supported_speeds[i] == 0) return -EOPNOTSUPP; memset(&(kingsun->speedparams), 0, sizeof(struct ksdazzle_speedparams)); kingsun->speedparams.baudrate = cpu_to_le32(speed); kingsun->speedparams.flags = KS_DATA_8_BITS; /* speed_setuprequest pre-filled in ksdazzle_probe */ usb_fill_control_urb(kingsun->speed_urb, kingsun->usbdev, usb_sndctrlpipe(kingsun->usbdev, 0), (unsigned char *)kingsun->speed_setuprequest, &(kingsun->speedparams), sizeof(struct ksdazzle_speedparams), ksdazzle_speed_irq, kingsun); kingsun->speed_urb->status = 0; err = usb_submit_urb(kingsun->speed_urb, GFP_ATOMIC); return err; } /* Submit one fragment of an IrDA frame to the dongle */ static void ksdazzle_send_irq(struct urb *urb); static int ksdazzle_submit_tx_fragment(struct ksdazzle_cb *kingsun) { unsigned int wraplen; int ret; /* We can send at most 7 bytes of payload at a time */ wraplen = 7; if (wraplen > kingsun->tx_buf_clear_used) wraplen = kingsun->tx_buf_clear_used; /* Prepare payload prefix with used length */ memset(kingsun->tx_payload, 0, 8); kingsun->tx_payload[0] = (unsigned char)0xf8 + wraplen; memcpy(kingsun->tx_payload + 1, kingsun->tx_buf_clear, wraplen); usb_fill_int_urb(kingsun->tx_urb, kingsun->usbdev, usb_sndintpipe(kingsun->usbdev, kingsun->ep_out), kingsun->tx_payload, 8, ksdazzle_send_irq, kingsun, 1); kingsun->tx_urb->status = 0; ret = usb_submit_urb(kingsun->tx_urb, GFP_ATOMIC); /* Remember how much data was sent, in order to update at callback */ kingsun->tx_buf_clear_sent = (ret == 0) ? wraplen : 0; return ret; } /* Callback transmission routine */ static void ksdazzle_send_irq(struct urb *urb) { struct ksdazzle_cb *kingsun = urb->context; struct net_device *netdev = kingsun->netdev; int ret = 0; /* in process of stopping, just drop data */ if (!netif_running(kingsun->netdev)) { err("ksdazzle_send_irq: Network not running!"); return; } /* unlink, shutdown, unplug, other nasties */ if (urb->status != 0) { err("ksdazzle_send_irq: urb asynchronously failed - %d", urb->status); return; } if (kingsun->tx_buf_clear_used > 0) { /* Update data remaining to be sent */ if (kingsun->tx_buf_clear_sent < kingsun->tx_buf_clear_used) { memmove(kingsun->tx_buf_clear, kingsun->tx_buf_clear + kingsun->tx_buf_clear_sent, kingsun->tx_buf_clear_used - kingsun->tx_buf_clear_sent); } kingsun->tx_buf_clear_used -= kingsun->tx_buf_clear_sent; kingsun->tx_buf_clear_sent = 0; if (kingsun->tx_buf_clear_used > 0) { /* There is more data to be sent */ if ((ret = ksdazzle_submit_tx_fragment(kingsun)) != 0) { err("ksdazzle_send_irq: failed tx_urb submit: %d", ret); switch (ret) { case -ENODEV: case -EPIPE: break; default: kingsun->stats.tx_errors++; netif_start_queue(netdev); } } } else { /* All data sent, send next speed && wake network queue */ if (kingsun->new_speed != -1 && cpu_to_le32(kingsun->new_speed) != kingsun->speedparams.baudrate) ksdazzle_change_speed(kingsun, kingsun->new_speed); netif_wake_queue(netdev); } } } /* * Called from net/core when new frame is available. */ static int ksdazzle_hard_xmit(struct sk_buff *skb, struct net_device *netdev) { struct ksdazzle_cb *kingsun; unsigned int wraplen; int ret = 0; if (skb == NULL || netdev == NULL) return -EINVAL; netif_stop_queue(netdev); /* the IRDA wrapping routines don't deal with non linear skb */ SKB_LINEAR_ASSERT(skb); kingsun = netdev_priv(netdev); spin_lock(&kingsun->lock); kingsun->new_speed = irda_get_next_speed(skb); /* Append data to the end of whatever data remains to be transmitted */ wraplen = async_wrap_skb(skb, kingsun->tx_buf_clear, KINGSUN_SND_FIFO_SIZE); kingsun->tx_buf_clear_used = wraplen; if ((ret = ksdazzle_submit_tx_fragment(kingsun)) != 0) { err("ksdazzle_hard_xmit: failed tx_urb submit: %d", ret); switch (ret) { case -ENODEV: case -EPIPE: break; default: kingsun->stats.tx_errors++; netif_start_queue(netdev); } } else { kingsun->stats.tx_packets++; kingsun->stats.tx_bytes += skb->len; } dev_kfree_skb(skb); spin_unlock(&kingsun->lock); return ret; } /* Receive callback function */ static void ksdazzle_rcv_irq(struct urb *urb) { struct ksdazzle_cb *kingsun = urb->context; /* in process of stopping, just drop data */ if (!netif_running(kingsun->netdev)) { kingsun->receiving = 0; return; } /* unlink, shutdown, unplug, other nasties */ if (urb->status != 0) { err("ksdazzle_rcv_irq: urb asynchronously failed - %d", urb->status); kingsun->receiving = 0; return; } if (urb->actual_length > 0) { __u8 *bytes = urb->transfer_buffer; unsigned int i; for (i = 0; i < urb->actual_length; i++) { async_unwrap_char(kingsun->netdev, &kingsun->stats, &kingsun->rx_unwrap_buff, bytes[i]); } kingsun->netdev->last_rx = jiffies; kingsun->receiving = (kingsun->rx_unwrap_buff.state != OUTSIDE_FRAME) ? 1 : 0; } /* This urb has already been filled in ksdazzle_net_open. It is assumed that urb keeps the pointer to the payload buffer. */ urb->status = 0; usb_submit_urb(urb, GFP_ATOMIC); } /* * Function ksdazzle_net_open (dev) * * Network device is taken up. Usually this is done by "ifconfig irda0 up" */ static int ksdazzle_net_open(struct net_device *netdev) { struct ksdazzle_cb *kingsun = netdev_priv(netdev); int err = -ENOMEM; char hwname[16]; /* At this point, urbs are NULL, and skb is NULL (see ksdazzle_probe) */ kingsun->receiving = 0; /* Initialize for SIR to copy data directly into skb. */ kingsun->rx_unwrap_buff.in_frame = FALSE; kingsun->rx_unwrap_buff.state = OUTSIDE_FRAME; kingsun->rx_unwrap_buff.truesize = IRDA_SKB_MAX_MTU; kingsun->rx_unwrap_buff.skb = dev_alloc_skb(IRDA_SKB_MAX_MTU); if (!kingsun->rx_unwrap_buff.skb) goto free_mem; skb_reserve(kingsun->rx_unwrap_buff.skb, 1); kingsun->rx_unwrap_buff.head = kingsun->rx_unwrap_buff.skb->data; kingsun->rx_urb = usb_alloc_urb(0, GFP_KERNEL); if (!kingsun->rx_urb) goto free_mem; kingsun->tx_urb = usb_alloc_urb(0, GFP_KERNEL); if (!kingsun->tx_urb) goto free_mem; kingsun->speed_urb = usb_alloc_urb(0, GFP_KERNEL); if (!kingsun->speed_urb) goto free_mem; /* Initialize speed for dongle */ kingsun->new_speed = 9600; err = ksdazzle_change_speed(kingsun, 9600); if (err < 0) goto free_mem; /* * Now that everything should be initialized properly, * Open new IrLAP layer instance to take care of us... */ sprintf(hwname, "usb#%d", kingsun->usbdev->devnum); kingsun->irlap = irlap_open(netdev, &kingsun->qos, hwname); if (!kingsun->irlap) { err("ksdazzle-sir: irlap_open failed"); goto free_mem; } /* Start reception. */ usb_fill_int_urb(kingsun->rx_urb, kingsun->usbdev, usb_rcvintpipe(kingsun->usbdev, kingsun->ep_in), kingsun->rx_buf, KINGSUN_RCV_MAX, ksdazzle_rcv_irq, kingsun, 1); kingsun->rx_urb->status = 0; err = usb_submit_urb(kingsun->rx_urb, GFP_KERNEL); if (err) { err("ksdazzle-sir: first urb-submit failed: %d", err); goto close_irlap; } netif_start_queue(netdev); /* Situation at this point: - all work buffers allocated - urbs allocated and ready to fill - max rx packet known (in max_rx) - unwrap state machine initialized, in state outside of any frame - receive request in progress - IrLAP layer started, about to hand over packets to send */ return 0; close_irlap: irlap_close(kingsun->irlap); free_mem: usb_free_urb(kingsun->speed_urb); kingsun->speed_urb = NULL; usb_free_urb(kingsun->tx_urb); kingsun->tx_urb = NULL; usb_free_urb(kingsun->rx_urb); kingsun->rx_urb = NULL; if (kingsun->rx_unwrap_buff.skb) { kfree_skb(kingsun->rx_unwrap_buff.skb); kingsun->rx_unwrap_buff.skb = NULL; kingsun->rx_unwrap_buff.head = NULL; } return err; } /* * Function ksdazzle_net_close (dev) * * Network device is taken down. Usually this is done by * "ifconfig irda0 down" */ static int ksdazzle_net_close(struct net_device *netdev) { struct ksdazzle_cb *kingsun = netdev_priv(netdev); /* Stop transmit processing */ netif_stop_queue(netdev); /* Mop up receive && transmit urb's */ usb_kill_urb(kingsun->tx_urb); usb_free_urb(kingsun->tx_urb); kingsun->tx_urb = NULL; usb_kill_urb(kingsun->speed_urb); usb_free_urb(kingsun->speed_urb); kingsun->speed_urb = NULL; usb_kill_urb(kingsun->rx_urb); usb_free_urb(kingsun->rx_urb); kingsun->rx_urb = NULL; kfree_skb(kingsun->rx_unwrap_buff.skb); kingsun->rx_unwrap_buff.skb = NULL; kingsun->rx_unwrap_buff.head = NULL; kingsun->rx_unwrap_buff.in_frame = FALSE; kingsun->rx_unwrap_buff.state = OUTSIDE_FRAME; kingsun->receiving = 0; /* Stop and remove instance of IrLAP */ irlap_close(kingsun->irlap); kingsun->irlap = NULL; return 0; } /* * IOCTLs : Extra out-of-band network commands... */ static int ksdazzle_net_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd) { struct if_irda_req *irq = (struct if_irda_req *)rq; struct ksdazzle_cb *kingsun = netdev_priv(netdev); int ret = 0; switch (cmd) { case SIOCSBANDWIDTH: /* Set bandwidth */ if (!capable(CAP_NET_ADMIN)) return -EPERM; /* Check if the device is still there */ if (netif_device_present(kingsun->netdev)) return ksdazzle_change_speed(kingsun, irq->ifr_baudrate); break; case SIOCSMEDIABUSY: /* Set media busy */ if (!capable(CAP_NET_ADMIN)) return -EPERM; /* Check if the IrDA stack is still there */ if (netif_running(kingsun->netdev)) irda_device_set_media_busy(kingsun->netdev, TRUE); break; case SIOCGRECEIVING: /* Only approximately true */ irq->ifr_receiving = kingsun->receiving; break; default: ret = -EOPNOTSUPP; } return ret; } /* * Get device stats (for /proc/net/dev and ifconfig) */ static struct net_device_stats *ksdazzle_net_get_stats(struct net_device *netdev) { struct ksdazzle_cb *kingsun = netdev_priv(netdev); return &kingsun->stats; } /* * 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. */ static int ksdazzle_probe(struct usb_interface *intf, const struct usb_device_id *id) { struct usb_host_interface *interface; struct usb_endpoint_descriptor *endpoint; struct usb_device *dev = interface_to_usbdev(intf); struct ksdazzle_cb *kingsun = NULL; struct net_device *net = NULL; int ret = -ENOMEM; int pipe, maxp_in, maxp_out; __u8 ep_in; __u8 ep_out; /* Check that there really are two interrupt endpoints. Check based on the one in drivers/usb/input/usbmouse.c */ interface = intf->cur_altsetting; if (interface->desc.bNumEndpoints != 2) { err("ksdazzle: expected 2 endpoints, found %d", interface->desc.bNumEndpoints); return -ENODEV; } endpoint = &interface->endpoint[KINGSUN_EP_IN].desc; if (!usb_endpoint_is_int_in(endpoint)) { err("ksdazzle: endpoint 0 is not interrupt IN"); return -ENODEV; } ep_in = endpoint->bEndpointAddress; pipe = usb_rcvintpipe(dev, ep_in); maxp_in = usb_maxpacket(dev, pipe, usb_pipeout(pipe)); if (maxp_in > 255 || maxp_in <= 1) { err("ksdazzle: endpoint 0 has max packet size %d not in range [2..255]", maxp_in); return -ENODEV; } endpoint = &interface->endpoint[KINGSUN_EP_OUT].desc; if (!usb_endpoint_is_int_out(endpoint)) { err("ksdazzle: endpoint 1 is not interrupt OUT"); return -ENODEV; } ep_out = endpoint->bEndpointAddress; pipe = usb_sndintpipe(dev, ep_out); maxp_out = usb_maxpacket(dev, pipe, usb_pipeout(pipe)); /* Allocate network device container. */ net = alloc_irdadev(sizeof(*kingsun)); if (!net) goto err_out1; SET_NETDEV_DEV(net, &intf->dev); kingsun = netdev_priv(net); kingsun->netdev = net; kingsun->usbdev = dev; kingsun->ep_in = ep_in; kingsun->ep_out = ep_out; kingsun->irlap = NULL; kingsun->tx_urb = NULL; kingsun->tx_buf_clear = NULL; kingsun->tx_buf_clear_used = 0; kingsun->tx_buf_clear_sent = 0; kingsun->rx_urb = NULL; kingsun->rx_buf = NULL; kingsun->rx_unwrap_buff.in_frame = FALSE; kingsun->rx_unwrap_buff.state = OUTSIDE_FRAME; kingsun->rx_unwrap_buff.skb = NULL; kingsun->receiving = 0; spin_lock_init(&kingsun->lock); kingsun->speed_setuprequest = NULL; kingsun->speed_urb = NULL; kingsun->speedparams.baudrate = 0; /* Allocate input buffer */ kingsun->rx_buf = kmalloc(KINGSUN_RCV_MAX, GFP_KERNEL); if (!kingsun->rx_buf) goto free_mem; /* Allocate output buffer */ kingsun->tx_buf_clear = kmalloc(KINGSUN_SND_FIFO_SIZE, GFP_KERNEL); if (!kingsun->tx_buf_clear) goto free_mem; /* Allocate and initialize speed setup packet */ kingsun->speed_setuprequest = kmalloc(sizeof(struct usb_ctrlrequest), GFP_KERNEL); if (!kingsun->speed_setuprequest) goto free_mem; kingsun->speed_setuprequest->bRequestType = USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE; kingsun->speed_setuprequest->bRequest = KINGSUN_REQ_SEND; kingsun->speed_setuprequest->wValue = cpu_to_le16(0x0200); kingsun->speed_setuprequest->wIndex = cpu_to_le16(0x0001); kingsun->speed_setuprequest->wLength = cpu_to_le16(sizeof(struct ksdazzle_speedparams)); printk(KERN_INFO "KingSun/Dazzle 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)); /* Initialize QoS for this device */ irda_init_max_qos_capabilies(&kingsun->qos); /* Baud rates known to be supported. Please uncomment if devices (other than a SonyEriccson K300 phone) can be shown to support higher speeds with this dongle. */ kingsun->qos.baud_rate.bits = IR_2400 | IR_9600 | IR_19200 | IR_38400 | IR_57600 | IR_115200; kingsun->qos.min_turn_time.bits &= KINGSUN_MTT; irda_qos_bits_to_value(&kingsun->qos); /* Override the network functions we need to use */ net->hard_start_xmit = ksdazzle_hard_xmit; net->open = ksdazzle_net_open; net->stop = ksdazzle_net_close; net->get_stats = ksdazzle_net_get_stats; net->do_ioctl = ksdazzle_net_ioctl; ret = register_netdev(net); if (ret != 0) goto free_mem; info("IrDA: Registered KingSun/Dazzle device %s", net->name); usb_set_intfdata(intf, kingsun); /* Situation at this point: - all work buffers allocated - setup requests pre-filled - urbs not allocated, set to NULL - max rx packet known (is KINGSUN_FIFO_SIZE) - unwrap state machine (partially) initialized, but skb == NULL */ return 0; free_mem: kfree(kingsun->speed_setuprequest); kfree(kingsun->tx_buf_clear); kfree(kingsun->rx_buf); free_netdev(net); err_out1: return ret; } /* * The current device is removed, the USB layer tell us to shut it down... */ static void ksdazzle_disconnect(struct usb_interface *intf) { struct ksdazzle_cb *kingsun = usb_get_intfdata(intf); if (!kingsun) return; unregister_netdev(kingsun->netdev); /* Mop up receive && transmit urb's */ usb_kill_urb(kingsun->speed_urb); usb_free_urb(kingsun->speed_urb); kingsun->speed_urb = NULL; usb_kill_urb(kingsun->tx_urb); usb_free_urb(kingsun->tx_urb); kingsun->tx_urb = NULL; usb_kill_urb(kingsun->rx_urb); usb_free_urb(kingsun->rx_urb); kingsun->rx_urb = NULL; kfree(kingsun->speed_setuprequest); kfree(kingsun->tx_buf_clear); kfree(kingsun->rx_buf); free_netdev(kingsun->netdev); usb_set_intfdata(intf, NULL); } #ifdef CONFIG_PM /* USB suspend, so power off the transmitter/receiver */ static int ksdazzle_suspend(struct usb_interface *intf, pm_message_t message) { struct ksdazzle_cb *kingsun = usb_get_intfdata(intf); netif_device_detach(kingsun->netdev); if (kingsun->speed_urb != NULL) usb_kill_urb(kingsun->speed_urb); if (kingsun->tx_urb != NULL) usb_kill_urb(kingsun->tx_urb); if (kingsun->rx_urb != NULL) usb_kill_urb(kingsun->rx_urb); return 0; } /* Coming out of suspend, so reset hardware */ static int ksdazzle_resume(struct usb_interface *intf) { struct ksdazzle_cb *kingsun = usb_get_intfdata(intf); if (kingsun->rx_urb != NULL) { /* Setup request already filled in ksdazzle_probe */ usb_submit_urb(kingsun->rx_urb, GFP_KERNEL); } netif_device_attach(kingsun->netdev); return 0; } #endif /* * USB device callbacks */ static struct usb_driver irda_driver = { .name = "ksdazzle-sir", .probe = ksdazzle_probe, .disconnect = ksdazzle_disconnect, .id_table = dongles, #ifdef CONFIG_PM .suspend = ksdazzle_suspend, .resume = ksdazzle_resume, #endif }; /* * Module insertion */ static int __init ksdazzle_init(void) { return usb_register(&irda_driver); } module_init(ksdazzle_init); /* * Module removal */ static void __exit ksdazzle_cleanup(void) { /* Deregister the driver and remove all pending instances */ usb_deregister(&irda_driver); } module_exit(ksdazzle_cleanup); MODULE_AUTHOR("Alex Villacís Lasso <a_villacis@palosanto.com>"); MODULE_DESCRIPTION("IrDA-USB Dongle Driver for KingSun Dazzle"); MODULE_LICENSE("GPL");