1 /*****************************************************************************
5 * Description: Irda KingSun Dazzle USB Dongle
7 * Author: Alex Villacís Lasso <a_villacis@palosanto.com>
9 * Based on stir4200, mcs7780, kingsun-sir drivers.
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
24 *****************************************************************************/
27 * Following is my most current (2007-07-26) understanding of how the Kingsun
28 * 07D0:4100 dongle (sometimes known as the MA-660) is supposed to work. This
29 * information was deduced by examining the USB traffic captured with USBSnoopy
30 * from the WinXP driver. Feel free to update here as more of the dongle is
33 * General: This dongle exposes one interface with two interrupt endpoints, one
34 * IN and one OUT. In this regard, it is similar to what the Kingsun/Donshine
35 * dongle (07c0:4200) exposes. Traffic is raw and needs to be wrapped and
36 * unwrapped manually as in stir4200, kingsun-sir, and ks959-sir.
38 * Transmission: To transmit an IrDA frame, it is necessary to wrap it, then
39 * split it into multiple segments of up to 7 bytes each, and transmit each in
40 * sequence. It seems that sending a single big block (like kingsun-sir does)
41 * won't work with this dongle. Each segment needs to be prefixed with a value
42 * equal to (unsigned char)0xF8 + <number of bytes in segment>, inside a payload
43 * of exactly 8 bytes. For example, a segment of 1 byte gets prefixed by 0xF9,
44 * and one of 7 bytes gets prefixed by 0xFF. The bytes at the end of the
45 * payload, not considered by the prefix, are ignored (set to 0 by this
48 * Reception: To receive data, the driver must poll the dongle regularly (like
49 * kingsun-sir.c) with interrupt URBs. If data is available, it will be returned
50 * in payloads from 0 to 8 bytes long. When concatenated, these payloads form
51 * a raw IrDA stream that needs to be unwrapped as in stir4200 and kingsun-sir
53 * Speed change: To change the speed of the dongle, the driver prepares a
54 * control URB with the following as a setup packet:
55 * bRequestType USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE
59 * wLength 0x0008 (length of the payload)
60 * The payload is a 8-byte record, apparently identical to the one used in
61 * drivers/usb/serial/cypress_m8.c to change speed:
63 * unsigned int dataBits : 2; // 0 - 5 bits 3 - 8 bits
65 * unsigned int stopBits : 1;
66 * unsigned int parityEnable : 1;
67 * unsigned int parityType : 1;
69 * unsigned int reset : 1;
70 * unsigned char reserved[3]; // set to 0
72 * For now only SIR speeds have been observed with this dongle. Therefore,
73 * nothing is known on what changes (if any) must be done to frame wrapping /
74 * unwrapping for higher than SIR speeds. This driver assumes no change is
75 * necessary and announces support for all the way to 115200 bps.
78 #include <linux/module.h>
79 #include <linux/moduleparam.h>
80 #include <linux/kernel.h>
81 #include <linux/types.h>
82 #include <linux/errno.h>
83 #include <linux/init.h>
84 #include <linux/slab.h>
85 #include <linux/module.h>
86 #include <linux/kref.h>
87 #include <linux/usb.h>
88 #include <linux/device.h>
89 #include <linux/crc32.h>
91 #include <asm/unaligned.h>
92 #include <asm/byteorder.h>
93 #include <asm/uaccess.h>
95 #include <net/irda/irda.h>
96 #include <net/irda/wrapper.h>
97 #include <net/irda/crc.h>
99 #define KSDAZZLE_VENDOR_ID 0x07d0
100 #define KSDAZZLE_PRODUCT_ID 0x4100
102 /* These are the currently known USB ids */
103 static struct usb_device_id dongles[] = {
104 /* KingSun Co,Ltd IrDA/USB Bridge */
105 {USB_DEVICE(KSDAZZLE_VENDOR_ID, KSDAZZLE_PRODUCT_ID)},
109 MODULE_DEVICE_TABLE(usb, dongles);
111 #define KINGSUN_MTT 0x07
112 #define KINGSUN_REQ_RECV 0x01
113 #define KINGSUN_REQ_SEND 0x09
115 #define KINGSUN_SND_FIFO_SIZE 2048 /* Max packet we can send */
117 struct ksdazzle_speedparams {
118 __le32 baudrate; /* baud rate, little endian */
121 } __attribute__ ((packed));
123 #define KS_DATA_5_BITS 0x00
124 #define KS_DATA_6_BITS 0x01
125 #define KS_DATA_7_BITS 0x02
126 #define KS_DATA_8_BITS 0x03
128 #define KS_STOP_BITS_1 0x00
129 #define KS_STOP_BITS_2 0x08
131 #define KS_PAR_DISABLE 0x00
132 #define KS_PAR_EVEN 0x10
133 #define KS_PAR_ODD 0x30
134 #define KS_RESET 0x80
136 #define KINGSUN_EP_IN 0
137 #define KINGSUN_EP_OUT 1
140 struct usb_device *usbdev; /* init: probe_irda */
141 struct net_device *netdev; /* network layer */
142 struct irlap_cb *irlap; /* The link layer we are binded to */
143 struct net_device_stats stats; /* network statistics */
148 unsigned int tx_buf_clear_used;
149 unsigned int tx_buf_clear_sent;
154 iobuff_t rx_unwrap_buff;
156 struct usb_ctrlrequest *speed_setuprequest;
157 struct urb *speed_urb;
158 struct ksdazzle_speedparams speedparams;
159 unsigned int new_speed;
168 /* Callback transmission routine */
169 static void ksdazzle_speed_irq(struct urb *urb)
171 /* unlink, shutdown, unplug, other nasties */
172 if (urb->status != 0) {
173 err("ksdazzle_speed_irq: urb asynchronously failed - %d",
178 /* Send a control request to change speed of the dongle */
179 static int ksdazzle_change_speed(struct ksdazzle_cb *kingsun, unsigned speed)
181 static unsigned int supported_speeds[] = { 2400, 9600, 19200, 38400,
182 57600, 115200, 576000, 1152000, 4000000, 0
187 if (kingsun->speed_setuprequest == NULL || kingsun->speed_urb == NULL)
190 /* Check that requested speed is among the supported ones */
191 for (i = 0; supported_speeds[i] && supported_speeds[i] != speed; i++) ;
192 if (supported_speeds[i] == 0)
195 memset(&(kingsun->speedparams), 0, sizeof(struct ksdazzle_speedparams));
196 kingsun->speedparams.baudrate = cpu_to_le32(speed);
197 kingsun->speedparams.flags = KS_DATA_8_BITS;
199 /* speed_setuprequest pre-filled in ksdazzle_probe */
200 usb_fill_control_urb(kingsun->speed_urb, kingsun->usbdev,
201 usb_sndctrlpipe(kingsun->usbdev, 0),
202 (unsigned char *)kingsun->speed_setuprequest,
203 &(kingsun->speedparams),
204 sizeof(struct ksdazzle_speedparams),
205 ksdazzle_speed_irq, kingsun);
206 kingsun->speed_urb->status = 0;
207 err = usb_submit_urb(kingsun->speed_urb, GFP_ATOMIC);
212 /* Submit one fragment of an IrDA frame to the dongle */
213 static void ksdazzle_send_irq(struct urb *urb);
214 static int ksdazzle_submit_tx_fragment(struct ksdazzle_cb *kingsun)
216 unsigned int wraplen;
219 /* We can send at most 7 bytes of payload at a time */
221 if (wraplen > kingsun->tx_buf_clear_used)
222 wraplen = kingsun->tx_buf_clear_used;
224 /* Prepare payload prefix with used length */
225 memset(kingsun->tx_payload, 0, 8);
226 kingsun->tx_payload[0] = (unsigned char)0xf8 + wraplen;
227 memcpy(kingsun->tx_payload + 1, kingsun->tx_buf_clear, wraplen);
229 usb_fill_int_urb(kingsun->tx_urb, kingsun->usbdev,
230 usb_sndintpipe(kingsun->usbdev, kingsun->ep_out),
231 kingsun->tx_payload, 8, ksdazzle_send_irq, kingsun, 1);
232 kingsun->tx_urb->status = 0;
233 ret = usb_submit_urb(kingsun->tx_urb, GFP_ATOMIC);
235 /* Remember how much data was sent, in order to update at callback */
236 kingsun->tx_buf_clear_sent = (ret == 0) ? wraplen : 0;
240 /* Callback transmission routine */
241 static void ksdazzle_send_irq(struct urb *urb)
243 struct ksdazzle_cb *kingsun = urb->context;
244 struct net_device *netdev = kingsun->netdev;
247 /* in process of stopping, just drop data */
248 if (!netif_running(kingsun->netdev)) {
249 err("ksdazzle_send_irq: Network not running!");
253 /* unlink, shutdown, unplug, other nasties */
254 if (urb->status != 0) {
255 err("ksdazzle_send_irq: urb asynchronously failed - %d",
260 if (kingsun->tx_buf_clear_used > 0) {
261 /* Update data remaining to be sent */
262 if (kingsun->tx_buf_clear_sent < kingsun->tx_buf_clear_used) {
263 memmove(kingsun->tx_buf_clear,
264 kingsun->tx_buf_clear +
265 kingsun->tx_buf_clear_sent,
266 kingsun->tx_buf_clear_used -
267 kingsun->tx_buf_clear_sent);
269 kingsun->tx_buf_clear_used -= kingsun->tx_buf_clear_sent;
270 kingsun->tx_buf_clear_sent = 0;
272 if (kingsun->tx_buf_clear_used > 0) {
273 /* There is more data to be sent */
274 if ((ret = ksdazzle_submit_tx_fragment(kingsun)) != 0) {
275 err("ksdazzle_send_irq: failed tx_urb submit: %d", ret);
281 kingsun->stats.tx_errors++;
282 netif_start_queue(netdev);
286 /* All data sent, send next speed && wake network queue */
287 if (kingsun->new_speed != -1 &&
288 cpu_to_le32(kingsun->new_speed) !=
289 kingsun->speedparams.baudrate)
290 ksdazzle_change_speed(kingsun,
293 netif_wake_queue(netdev);
299 * Called from net/core when new frame is available.
301 static int ksdazzle_hard_xmit(struct sk_buff *skb, struct net_device *netdev)
303 struct ksdazzle_cb *kingsun;
304 unsigned int wraplen;
307 if (skb == NULL || netdev == NULL)
310 netif_stop_queue(netdev);
312 /* the IRDA wrapping routines don't deal with non linear skb */
313 SKB_LINEAR_ASSERT(skb);
315 kingsun = netdev_priv(netdev);
317 spin_lock(&kingsun->lock);
318 kingsun->new_speed = irda_get_next_speed(skb);
320 /* Append data to the end of whatever data remains to be transmitted */
322 async_wrap_skb(skb, kingsun->tx_buf_clear, KINGSUN_SND_FIFO_SIZE);
323 kingsun->tx_buf_clear_used = wraplen;
325 if ((ret = ksdazzle_submit_tx_fragment(kingsun)) != 0) {
326 err("ksdazzle_hard_xmit: failed tx_urb submit: %d", ret);
332 kingsun->stats.tx_errors++;
333 netif_start_queue(netdev);
336 kingsun->stats.tx_packets++;
337 kingsun->stats.tx_bytes += skb->len;
342 spin_unlock(&kingsun->lock);
347 /* Receive callback function */
348 static void ksdazzle_rcv_irq(struct urb *urb)
350 struct ksdazzle_cb *kingsun = urb->context;
352 /* in process of stopping, just drop data */
353 if (!netif_running(kingsun->netdev)) {
354 kingsun->receiving = 0;
358 /* unlink, shutdown, unplug, other nasties */
359 if (urb->status != 0) {
360 err("ksdazzle_rcv_irq: urb asynchronously failed - %d",
362 kingsun->receiving = 0;
366 if (urb->actual_length > 0) {
367 __u8 *bytes = urb->transfer_buffer;
370 for (i = 0; i < urb->actual_length; i++) {
371 async_unwrap_char(kingsun->netdev, &kingsun->stats,
372 &kingsun->rx_unwrap_buff, bytes[i]);
374 kingsun->netdev->last_rx = jiffies;
376 (kingsun->rx_unwrap_buff.state != OUTSIDE_FRAME) ? 1 : 0;
379 /* This urb has already been filled in ksdazzle_net_open. It is assumed that
380 urb keeps the pointer to the payload buffer.
383 usb_submit_urb(urb, GFP_ATOMIC);
387 * Function ksdazzle_net_open (dev)
389 * Network device is taken up. Usually this is done by "ifconfig irda0 up"
391 static int ksdazzle_net_open(struct net_device *netdev)
393 struct ksdazzle_cb *kingsun = netdev_priv(netdev);
397 /* At this point, urbs are NULL, and skb is NULL (see ksdazzle_probe) */
398 kingsun->receiving = 0;
400 /* Initialize for SIR to copy data directly into skb. */
401 kingsun->rx_unwrap_buff.in_frame = FALSE;
402 kingsun->rx_unwrap_buff.state = OUTSIDE_FRAME;
403 kingsun->rx_unwrap_buff.truesize = IRDA_SKB_MAX_MTU;
404 kingsun->rx_unwrap_buff.skb = dev_alloc_skb(IRDA_SKB_MAX_MTU);
405 if (!kingsun->rx_unwrap_buff.skb)
408 skb_reserve(kingsun->rx_unwrap_buff.skb, 1);
409 kingsun->rx_unwrap_buff.head = kingsun->rx_unwrap_buff.skb->data;
411 kingsun->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
412 if (!kingsun->rx_urb)
415 kingsun->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
416 if (!kingsun->tx_urb)
419 kingsun->speed_urb = usb_alloc_urb(0, GFP_KERNEL);
420 if (!kingsun->speed_urb)
423 /* Initialize speed for dongle */
424 kingsun->new_speed = 9600;
425 err = ksdazzle_change_speed(kingsun, 9600);
430 * Now that everything should be initialized properly,
431 * Open new IrLAP layer instance to take care of us...
433 sprintf(hwname, "usb#%d", kingsun->usbdev->devnum);
434 kingsun->irlap = irlap_open(netdev, &kingsun->qos, hwname);
435 if (!kingsun->irlap) {
436 err("ksdazzle-sir: irlap_open failed");
440 /* Start reception. */
441 usb_fill_int_urb(kingsun->rx_urb, kingsun->usbdev,
442 usb_rcvintpipe(kingsun->usbdev, kingsun->ep_in),
443 kingsun->rx_payload, 8, ksdazzle_rcv_irq, kingsun, 1);
444 kingsun->rx_urb->status = 0;
445 err = usb_submit_urb(kingsun->rx_urb, GFP_KERNEL);
447 err("ksdazzle-sir: first urb-submit failed: %d", err);
451 netif_start_queue(netdev);
453 /* Situation at this point:
454 - all work buffers allocated
455 - urbs allocated and ready to fill
456 - max rx packet known (in max_rx)
457 - unwrap state machine initialized, in state outside of any frame
458 - receive request in progress
459 - IrLAP layer started, about to hand over packets to send
465 irlap_close(kingsun->irlap);
467 usb_free_urb(kingsun->speed_urb);
468 kingsun->speed_urb = NULL;
469 usb_free_urb(kingsun->tx_urb);
470 kingsun->tx_urb = NULL;
471 usb_free_urb(kingsun->rx_urb);
472 kingsun->rx_urb = NULL;
473 if (kingsun->rx_unwrap_buff.skb) {
474 kfree_skb(kingsun->rx_unwrap_buff.skb);
475 kingsun->rx_unwrap_buff.skb = NULL;
476 kingsun->rx_unwrap_buff.head = NULL;
482 * Function ksdazzle_net_close (dev)
484 * Network device is taken down. Usually this is done by
485 * "ifconfig irda0 down"
487 static int ksdazzle_net_close(struct net_device *netdev)
489 struct ksdazzle_cb *kingsun = netdev_priv(netdev);
491 /* Stop transmit processing */
492 netif_stop_queue(netdev);
494 /* Mop up receive && transmit urb's */
495 usb_kill_urb(kingsun->tx_urb);
496 usb_free_urb(kingsun->tx_urb);
497 kingsun->tx_urb = NULL;
499 usb_kill_urb(kingsun->speed_urb);
500 usb_free_urb(kingsun->speed_urb);
501 kingsun->speed_urb = NULL;
503 usb_kill_urb(kingsun->rx_urb);
504 usb_free_urb(kingsun->rx_urb);
505 kingsun->rx_urb = NULL;
507 kfree_skb(kingsun->rx_unwrap_buff.skb);
508 kingsun->rx_unwrap_buff.skb = NULL;
509 kingsun->rx_unwrap_buff.head = NULL;
510 kingsun->rx_unwrap_buff.in_frame = FALSE;
511 kingsun->rx_unwrap_buff.state = OUTSIDE_FRAME;
512 kingsun->receiving = 0;
514 /* Stop and remove instance of IrLAP */
515 irlap_close(kingsun->irlap);
517 kingsun->irlap = NULL;
523 * IOCTLs : Extra out-of-band network commands...
525 static int ksdazzle_net_ioctl(struct net_device *netdev, struct ifreq *rq,
528 struct if_irda_req *irq = (struct if_irda_req *)rq;
529 struct ksdazzle_cb *kingsun = netdev_priv(netdev);
533 case SIOCSBANDWIDTH: /* Set bandwidth */
534 if (!capable(CAP_NET_ADMIN))
537 /* Check if the device is still there */
538 if (netif_device_present(kingsun->netdev))
539 return ksdazzle_change_speed(kingsun,
543 case SIOCSMEDIABUSY: /* Set media busy */
544 if (!capable(CAP_NET_ADMIN))
547 /* Check if the IrDA stack is still there */
548 if (netif_running(kingsun->netdev))
549 irda_device_set_media_busy(kingsun->netdev, TRUE);
553 /* Only approximately true */
554 irq->ifr_receiving = kingsun->receiving;
565 * Get device stats (for /proc/net/dev and ifconfig)
567 static struct net_device_stats *ksdazzle_net_get_stats(struct net_device
570 struct ksdazzle_cb *kingsun = netdev_priv(netdev);
571 return &kingsun->stats;
575 * This routine is called by the USB subsystem for each new device
576 * in the system. We need to check if the device is ours, and in
577 * this case start handling it.
579 static int ksdazzle_probe(struct usb_interface *intf,
580 const struct usb_device_id *id)
582 struct usb_host_interface *interface;
583 struct usb_endpoint_descriptor *endpoint;
585 struct usb_device *dev = interface_to_usbdev(intf);
586 struct ksdazzle_cb *kingsun = NULL;
587 struct net_device *net = NULL;
589 int pipe, maxp_in, maxp_out;
593 /* Check that there really are two interrupt endpoints. Check based on the
594 one in drivers/usb/input/usbmouse.c
596 interface = intf->cur_altsetting;
597 if (interface->desc.bNumEndpoints != 2) {
598 err("ksdazzle: expected 2 endpoints, found %d",
599 interface->desc.bNumEndpoints);
602 endpoint = &interface->endpoint[KINGSUN_EP_IN].desc;
603 if (!usb_endpoint_is_int_in(endpoint)) {
604 err("ksdazzle: endpoint 0 is not interrupt IN");
608 ep_in = endpoint->bEndpointAddress;
609 pipe = usb_rcvintpipe(dev, ep_in);
610 maxp_in = usb_maxpacket(dev, pipe, usb_pipeout(pipe));
611 if (maxp_in > 255 || maxp_in <= 1) {
612 err("ksdazzle: endpoint 0 has max packet size %d not in range [2..255]", maxp_in);
616 endpoint = &interface->endpoint[KINGSUN_EP_OUT].desc;
617 if (!usb_endpoint_is_int_out(endpoint)) {
618 err("ksdazzle: endpoint 1 is not interrupt OUT");
622 ep_out = endpoint->bEndpointAddress;
623 pipe = usb_sndintpipe(dev, ep_out);
624 maxp_out = usb_maxpacket(dev, pipe, usb_pipeout(pipe));
626 /* Allocate network device container. */
627 net = alloc_irdadev(sizeof(*kingsun));
631 SET_NETDEV_DEV(net, &intf->dev);
632 kingsun = netdev_priv(net);
633 kingsun->netdev = net;
634 kingsun->usbdev = dev;
635 kingsun->ep_in = ep_in;
636 kingsun->ep_out = ep_out;
637 kingsun->irlap = NULL;
638 kingsun->tx_urb = NULL;
639 kingsun->tx_buf_clear = NULL;
640 kingsun->tx_buf_clear_used = 0;
641 kingsun->tx_buf_clear_sent = 0;
643 kingsun->rx_urb = NULL;
644 kingsun->rx_unwrap_buff.in_frame = FALSE;
645 kingsun->rx_unwrap_buff.state = OUTSIDE_FRAME;
646 kingsun->rx_unwrap_buff.skb = NULL;
647 kingsun->receiving = 0;
648 spin_lock_init(&kingsun->lock);
650 kingsun->speed_setuprequest = NULL;
651 kingsun->speed_urb = NULL;
652 kingsun->speedparams.baudrate = 0;
654 /* Allocate output buffer */
655 kingsun->tx_buf_clear = kmalloc(KINGSUN_SND_FIFO_SIZE, GFP_KERNEL);
656 if (!kingsun->tx_buf_clear)
659 /* Allocate and initialize speed setup packet */
660 kingsun->speed_setuprequest =
661 kmalloc(sizeof(struct usb_ctrlrequest), GFP_KERNEL);
662 if (!kingsun->speed_setuprequest)
664 kingsun->speed_setuprequest->bRequestType =
665 USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE;
666 kingsun->speed_setuprequest->bRequest = KINGSUN_REQ_SEND;
667 kingsun->speed_setuprequest->wValue = cpu_to_le16(0x0200);
668 kingsun->speed_setuprequest->wIndex = cpu_to_le16(0x0001);
669 kingsun->speed_setuprequest->wLength =
670 cpu_to_le16(sizeof(struct ksdazzle_speedparams));
672 printk(KERN_INFO "KingSun/Dazzle IRDA/USB found at address %d, "
673 "Vendor: %x, Product: %x\n",
674 dev->devnum, le16_to_cpu(dev->descriptor.idVendor),
675 le16_to_cpu(dev->descriptor.idProduct));
677 /* Initialize QoS for this device */
678 irda_init_max_qos_capabilies(&kingsun->qos);
680 /* Baud rates known to be supported. Please uncomment if devices (other
681 than a SonyEriccson K300 phone) can be shown to support higher speeds
684 kingsun->qos.baud_rate.bits =
685 IR_2400 | IR_9600 | IR_19200 | IR_38400 | IR_57600 | IR_115200;
686 kingsun->qos.min_turn_time.bits &= KINGSUN_MTT;
687 irda_qos_bits_to_value(&kingsun->qos);
689 /* Override the network functions we need to use */
690 net->hard_start_xmit = ksdazzle_hard_xmit;
691 net->open = ksdazzle_net_open;
692 net->stop = ksdazzle_net_close;
693 net->get_stats = ksdazzle_net_get_stats;
694 net->do_ioctl = ksdazzle_net_ioctl;
696 ret = register_netdev(net);
700 info("IrDA: Registered KingSun/Dazzle device %s", net->name);
702 usb_set_intfdata(intf, kingsun);
704 /* Situation at this point:
705 - all work buffers allocated
706 - setup requests pre-filled
707 - urbs not allocated, set to NULL
708 - max rx packet known (is KINGSUN_FIFO_SIZE)
709 - unwrap state machine (partially) initialized, but skb == NULL
715 kfree(kingsun->speed_setuprequest);
716 kfree(kingsun->tx_buf_clear);
723 * The current device is removed, the USB layer tell us to shut it down...
725 static void ksdazzle_disconnect(struct usb_interface *intf)
727 struct ksdazzle_cb *kingsun = usb_get_intfdata(intf);
732 unregister_netdev(kingsun->netdev);
734 /* Mop up receive && transmit urb's */
735 usb_kill_urb(kingsun->speed_urb);
736 usb_free_urb(kingsun->speed_urb);
737 kingsun->speed_urb = NULL;
739 usb_kill_urb(kingsun->tx_urb);
740 usb_free_urb(kingsun->tx_urb);
741 kingsun->tx_urb = NULL;
743 usb_kill_urb(kingsun->rx_urb);
744 usb_free_urb(kingsun->rx_urb);
745 kingsun->rx_urb = NULL;
747 kfree(kingsun->speed_setuprequest);
748 kfree(kingsun->tx_buf_clear);
749 free_netdev(kingsun->netdev);
751 usb_set_intfdata(intf, NULL);
755 /* USB suspend, so power off the transmitter/receiver */
756 static int ksdazzle_suspend(struct usb_interface *intf, pm_message_t message)
758 struct ksdazzle_cb *kingsun = usb_get_intfdata(intf);
760 netif_device_detach(kingsun->netdev);
761 if (kingsun->speed_urb != NULL)
762 usb_kill_urb(kingsun->speed_urb);
763 if (kingsun->tx_urb != NULL)
764 usb_kill_urb(kingsun->tx_urb);
765 if (kingsun->rx_urb != NULL)
766 usb_kill_urb(kingsun->rx_urb);
770 /* Coming out of suspend, so reset hardware */
771 static int ksdazzle_resume(struct usb_interface *intf)
773 struct ksdazzle_cb *kingsun = usb_get_intfdata(intf);
775 if (kingsun->rx_urb != NULL) {
776 /* Setup request already filled in ksdazzle_probe */
777 usb_submit_urb(kingsun->rx_urb, GFP_KERNEL);
779 netif_device_attach(kingsun->netdev);
786 * USB device callbacks
788 static struct usb_driver irda_driver = {
789 .name = "ksdazzle-sir",
790 .probe = ksdazzle_probe,
791 .disconnect = ksdazzle_disconnect,
794 .suspend = ksdazzle_suspend,
795 .resume = ksdazzle_resume,
802 static int __init ksdazzle_init(void)
804 return usb_register(&irda_driver);
807 module_init(ksdazzle_init);
812 static void __exit ksdazzle_cleanup(void)
814 /* Deregister the driver and remove all pending instances */
815 usb_deregister(&irda_driver);
818 module_exit(ksdazzle_cleanup);
820 MODULE_AUTHOR("Alex Villacís Lasso <a_villacis@palosanto.com>");
821 MODULE_DESCRIPTION("IrDA-USB Dongle Driver for KingSun Dazzle");
822 MODULE_LICENSE("GPL");