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1 /*****************************************************************************
2 *
3 * Filename:      ksdazzle.c
4 * Version:       0.1.2
5 * Description:   Irda KingSun Dazzle USB Dongle
6 * Status:        Experimental
7 * Author:        Alex Villacís Lasso <a_villacis@palosanto.com>
8 *
9 *    Based on stir4200, mcs7780, kingsun-sir drivers.
10 *
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.
14 *
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.
19 *
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.
23 *
24 *****************************************************************************/
25
26 /*
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
31  * known.
32  *
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.
37  *
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
46  * implementation).
47  *
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
52  *
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
56  *    bRequest        0x09
57  *    wValue          0x0200
58  *    wIndex          0x0001
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:
62  *     __u32 baudSpeed;
63  *    unsigned int dataBits : 2;    // 0 - 5 bits 3 - 8 bits
64  *    unsigned int : 1;
65  *    unsigned int stopBits : 1;
66  *    unsigned int parityEnable : 1;
67  *    unsigned int parityType : 1;
68  *    unsigned int : 1;
69  *    unsigned int reset : 1;
70  *    unsigned char reserved[3];    // set to 0
71  *
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.
76  */
77
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>
90
91 #include <asm/unaligned.h>
92 #include <asm/byteorder.h>
93 #include <asm/uaccess.h>
94
95 #include <net/irda/irda.h>
96 #include <net/irda/wrapper.h>
97 #include <net/irda/crc.h>
98
99 #define KSDAZZLE_VENDOR_ID 0x07d0
100 #define KSDAZZLE_PRODUCT_ID 0x4100
101
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)},
106         {}
107 };
108
109 MODULE_DEVICE_TABLE(usb, dongles);
110
111 #define KINGSUN_MTT 0x07
112 #define KINGSUN_REQ_RECV 0x01
113 #define KINGSUN_REQ_SEND 0x09
114
115 #define KINGSUN_SND_FIFO_SIZE    2048   /* Max packet we can send */
116 #define KINGSUN_RCV_MAX 2048    /* Max transfer we can receive */
117
118 struct ksdazzle_speedparams {
119         __le32 baudrate;        /* baud rate, little endian */
120         __u8 flags;
121         __u8 reserved[3];
122 } __attribute__ ((packed));
123
124 #define KS_DATA_5_BITS 0x00
125 #define KS_DATA_6_BITS 0x01
126 #define KS_DATA_7_BITS 0x02
127 #define KS_DATA_8_BITS 0x03
128
129 #define KS_STOP_BITS_1 0x00
130 #define KS_STOP_BITS_2 0x08
131
132 #define KS_PAR_DISABLE    0x00
133 #define KS_PAR_EVEN    0x10
134 #define KS_PAR_ODD    0x30
135 #define KS_RESET    0x80
136
137 #define KINGSUN_EP_IN                   0
138 #define KINGSUN_EP_OUT                  1
139
140 struct ksdazzle_cb {
141         struct usb_device *usbdev;      /* init: probe_irda */
142         struct net_device *netdev;      /* network layer */
143         struct irlap_cb *irlap; /* The link layer we are binded to */
144         struct net_device_stats stats;  /* network statistics */
145         struct qos_info qos;
146
147         struct urb *tx_urb;
148         __u8 *tx_buf_clear;
149         unsigned int tx_buf_clear_used;
150         unsigned int tx_buf_clear_sent;
151         __u8 tx_payload[8];
152
153         struct urb *rx_urb;
154         __u8 *rx_buf;
155         iobuff_t rx_unwrap_buff;
156
157         struct usb_ctrlrequest *speed_setuprequest;
158         struct urb *speed_urb;
159         struct ksdazzle_speedparams speedparams;
160         unsigned int new_speed;
161
162         __u8 ep_in;
163         __u8 ep_out;
164
165         spinlock_t lock;
166         int receiving;
167 };
168
169 /* Callback transmission routine */
170 static void ksdazzle_speed_irq(struct urb *urb)
171 {
172         /* unlink, shutdown, unplug, other nasties */
173         if (urb->status != 0) {
174                 err("ksdazzle_speed_irq: urb asynchronously failed - %d",
175                     urb->status);
176         }
177 }
178
179 /* Send a control request to change speed of the dongle */
180 static int ksdazzle_change_speed(struct ksdazzle_cb *kingsun, unsigned speed)
181 {
182         static unsigned int supported_speeds[] = { 2400, 9600, 19200, 38400,
183                 57600, 115200, 576000, 1152000, 4000000, 0
184         };
185         int err;
186         unsigned int i;
187
188         if (kingsun->speed_setuprequest == NULL || kingsun->speed_urb == NULL)
189                 return -ENOMEM;
190
191         /* Check that requested speed is among the supported ones */
192         for (i = 0; supported_speeds[i] && supported_speeds[i] != speed; i++) ;
193         if (supported_speeds[i] == 0)
194                 return -EOPNOTSUPP;
195
196         memset(&(kingsun->speedparams), 0, sizeof(struct ksdazzle_speedparams));
197         kingsun->speedparams.baudrate = cpu_to_le32(speed);
198         kingsun->speedparams.flags = KS_DATA_8_BITS;
199
200         /* speed_setuprequest pre-filled in ksdazzle_probe */
201         usb_fill_control_urb(kingsun->speed_urb, kingsun->usbdev,
202                              usb_sndctrlpipe(kingsun->usbdev, 0),
203                              (unsigned char *)kingsun->speed_setuprequest,
204                              &(kingsun->speedparams),
205                              sizeof(struct ksdazzle_speedparams),
206                              ksdazzle_speed_irq, kingsun);
207         kingsun->speed_urb->status = 0;
208         err = usb_submit_urb(kingsun->speed_urb, GFP_ATOMIC);
209
210         return err;
211 }
212
213 /* Submit one fragment of an IrDA frame to the dongle */
214 static void ksdazzle_send_irq(struct urb *urb);
215 static int ksdazzle_submit_tx_fragment(struct ksdazzle_cb *kingsun)
216 {
217         unsigned int wraplen;
218         int ret;
219
220         /* We can send at most 7 bytes of payload at a time */
221         wraplen = 7;
222         if (wraplen > kingsun->tx_buf_clear_used)
223                 wraplen = kingsun->tx_buf_clear_used;
224
225         /* Prepare payload prefix with used length */
226         memset(kingsun->tx_payload, 0, 8);
227         kingsun->tx_payload[0] = (unsigned char)0xf8 + wraplen;
228         memcpy(kingsun->tx_payload + 1, kingsun->tx_buf_clear, wraplen);
229
230         usb_fill_int_urb(kingsun->tx_urb, kingsun->usbdev,
231                          usb_sndintpipe(kingsun->usbdev, kingsun->ep_out),
232                          kingsun->tx_payload, 8, ksdazzle_send_irq, kingsun, 1);
233         kingsun->tx_urb->status = 0;
234         ret = usb_submit_urb(kingsun->tx_urb, GFP_ATOMIC);
235
236         /* Remember how much data was sent, in order to update at callback */
237         kingsun->tx_buf_clear_sent = (ret == 0) ? wraplen : 0;
238         return ret;
239 }
240
241 /* Callback transmission routine */
242 static void ksdazzle_send_irq(struct urb *urb)
243 {
244         struct ksdazzle_cb *kingsun = urb->context;
245         struct net_device *netdev = kingsun->netdev;
246         int ret = 0;
247
248         /* in process of stopping, just drop data */
249         if (!netif_running(kingsun->netdev)) {
250                 err("ksdazzle_send_irq: Network not running!");
251                 return;
252         }
253
254         /* unlink, shutdown, unplug, other nasties */
255         if (urb->status != 0) {
256                 err("ksdazzle_send_irq: urb asynchronously failed - %d",
257                     urb->status);
258                 return;
259         }
260
261         if (kingsun->tx_buf_clear_used > 0) {
262                 /* Update data remaining to be sent */
263                 if (kingsun->tx_buf_clear_sent < kingsun->tx_buf_clear_used) {
264                         memmove(kingsun->tx_buf_clear,
265                                 kingsun->tx_buf_clear +
266                                 kingsun->tx_buf_clear_sent,
267                                 kingsun->tx_buf_clear_used -
268                                 kingsun->tx_buf_clear_sent);
269                 }
270                 kingsun->tx_buf_clear_used -= kingsun->tx_buf_clear_sent;
271                 kingsun->tx_buf_clear_sent = 0;
272
273                 if (kingsun->tx_buf_clear_used > 0) {
274                         /* There is more data to be sent */
275                         if ((ret = ksdazzle_submit_tx_fragment(kingsun)) != 0) {
276                                 err("ksdazzle_send_irq: failed tx_urb submit: %d", ret);
277                                 switch (ret) {
278                                 case -ENODEV:
279                                 case -EPIPE:
280                                         break;
281                                 default:
282                                         kingsun->stats.tx_errors++;
283                                         netif_start_queue(netdev);
284                                 }
285                         }
286                 } else {
287                         /* All data sent, send next speed && wake network queue */
288                         if (kingsun->new_speed != -1 &&
289                             cpu_to_le32(kingsun->new_speed) !=
290                             kingsun->speedparams.baudrate)
291                                 ksdazzle_change_speed(kingsun,
292                                                       kingsun->new_speed);
293
294                         netif_wake_queue(netdev);
295                 }
296         }
297 }
298
299 /*
300  * Called from net/core when new frame is available.
301  */
302 static int ksdazzle_hard_xmit(struct sk_buff *skb, struct net_device *netdev)
303 {
304         struct ksdazzle_cb *kingsun;
305         unsigned int wraplen;
306         int ret = 0;
307
308         if (skb == NULL || netdev == NULL)
309                 return -EINVAL;
310
311         netif_stop_queue(netdev);
312
313         /* the IRDA wrapping routines don't deal with non linear skb */
314         SKB_LINEAR_ASSERT(skb);
315
316         kingsun = netdev_priv(netdev);
317
318         spin_lock(&kingsun->lock);
319         kingsun->new_speed = irda_get_next_speed(skb);
320
321         /* Append data to the end of whatever data remains to be transmitted */
322         wraplen =
323             async_wrap_skb(skb, kingsun->tx_buf_clear, KINGSUN_SND_FIFO_SIZE);
324         kingsun->tx_buf_clear_used = wraplen;
325
326         if ((ret = ksdazzle_submit_tx_fragment(kingsun)) != 0) {
327                 err("ksdazzle_hard_xmit: failed tx_urb submit: %d", ret);
328                 switch (ret) {
329                 case -ENODEV:
330                 case -EPIPE:
331                         break;
332                 default:
333                         kingsun->stats.tx_errors++;
334                         netif_start_queue(netdev);
335                 }
336         } else {
337                 kingsun->stats.tx_packets++;
338                 kingsun->stats.tx_bytes += skb->len;
339
340         }
341
342         dev_kfree_skb(skb);
343         spin_unlock(&kingsun->lock);
344
345         return ret;
346 }
347
348 /* Receive callback function */
349 static void ksdazzle_rcv_irq(struct urb *urb)
350 {
351         struct ksdazzle_cb *kingsun = urb->context;
352
353         /* in process of stopping, just drop data */
354         if (!netif_running(kingsun->netdev)) {
355                 kingsun->receiving = 0;
356                 return;
357         }
358
359         /* unlink, shutdown, unplug, other nasties */
360         if (urb->status != 0) {
361                 err("ksdazzle_rcv_irq: urb asynchronously failed - %d",
362                     urb->status);
363                 kingsun->receiving = 0;
364                 return;
365         }
366
367         if (urb->actual_length > 0) {
368                 __u8 *bytes = urb->transfer_buffer;
369                 unsigned int i;
370
371                 for (i = 0; i < urb->actual_length; i++) {
372                         async_unwrap_char(kingsun->netdev, &kingsun->stats,
373                                           &kingsun->rx_unwrap_buff, bytes[i]);
374                 }
375                 kingsun->netdev->last_rx = jiffies;
376                 kingsun->receiving =
377                     (kingsun->rx_unwrap_buff.state != OUTSIDE_FRAME) ? 1 : 0;
378         }
379
380         /* This urb has already been filled in ksdazzle_net_open. It is assumed that
381            urb keeps the pointer to the payload buffer.
382          */
383         urb->status = 0;
384         usb_submit_urb(urb, GFP_ATOMIC);
385 }
386
387 /*
388  * Function ksdazzle_net_open (dev)
389  *
390  *    Network device is taken up. Usually this is done by "ifconfig irda0 up"
391  */
392 static int ksdazzle_net_open(struct net_device *netdev)
393 {
394         struct ksdazzle_cb *kingsun = netdev_priv(netdev);
395         int err = -ENOMEM;
396         char hwname[16];
397
398         /* At this point, urbs are NULL, and skb is NULL (see ksdazzle_probe) */
399         kingsun->receiving = 0;
400
401         /* Initialize for SIR to copy data directly into skb.  */
402         kingsun->rx_unwrap_buff.in_frame = FALSE;
403         kingsun->rx_unwrap_buff.state = OUTSIDE_FRAME;
404         kingsun->rx_unwrap_buff.truesize = IRDA_SKB_MAX_MTU;
405         kingsun->rx_unwrap_buff.skb = dev_alloc_skb(IRDA_SKB_MAX_MTU);
406         if (!kingsun->rx_unwrap_buff.skb)
407                 goto free_mem;
408
409         skb_reserve(kingsun->rx_unwrap_buff.skb, 1);
410         kingsun->rx_unwrap_buff.head = kingsun->rx_unwrap_buff.skb->data;
411
412         kingsun->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
413         if (!kingsun->rx_urb)
414                 goto free_mem;
415
416         kingsun->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
417         if (!kingsun->tx_urb)
418                 goto free_mem;
419
420         kingsun->speed_urb = usb_alloc_urb(0, GFP_KERNEL);
421         if (!kingsun->speed_urb)
422                 goto free_mem;
423
424         /* Initialize speed for dongle */
425         kingsun->new_speed = 9600;
426         err = ksdazzle_change_speed(kingsun, 9600);
427         if (err < 0)
428                 goto free_mem;
429
430         /*
431          * Now that everything should be initialized properly,
432          * Open new IrLAP layer instance to take care of us...
433          */
434         sprintf(hwname, "usb#%d", kingsun->usbdev->devnum);
435         kingsun->irlap = irlap_open(netdev, &kingsun->qos, hwname);
436         if (!kingsun->irlap) {
437                 err("ksdazzle-sir: irlap_open failed");
438                 goto free_mem;
439         }
440
441         /* Start reception. */
442         usb_fill_int_urb(kingsun->rx_urb, kingsun->usbdev,
443                          usb_rcvintpipe(kingsun->usbdev, kingsun->ep_in),
444                          kingsun->rx_buf, KINGSUN_RCV_MAX, ksdazzle_rcv_irq,
445                          kingsun, 1);
446         kingsun->rx_urb->status = 0;
447         err = usb_submit_urb(kingsun->rx_urb, GFP_KERNEL);
448         if (err) {
449                 err("ksdazzle-sir: first urb-submit failed: %d", err);
450                 goto close_irlap;
451         }
452
453         netif_start_queue(netdev);
454
455         /* Situation at this point:
456            - all work buffers allocated
457            - urbs allocated and ready to fill
458            - max rx packet known (in max_rx)
459            - unwrap state machine initialized, in state outside of any frame
460            - receive request in progress
461            - IrLAP layer started, about to hand over packets to send
462          */
463
464         return 0;
465
466       close_irlap:
467         irlap_close(kingsun->irlap);
468       free_mem:
469         usb_free_urb(kingsun->speed_urb);
470         kingsun->speed_urb = NULL;
471         usb_free_urb(kingsun->tx_urb);
472         kingsun->tx_urb = NULL;
473         usb_free_urb(kingsun->rx_urb);
474         kingsun->rx_urb = NULL;
475         if (kingsun->rx_unwrap_buff.skb) {
476                 kfree_skb(kingsun->rx_unwrap_buff.skb);
477                 kingsun->rx_unwrap_buff.skb = NULL;
478                 kingsun->rx_unwrap_buff.head = NULL;
479         }
480         return err;
481 }
482
483 /*
484  * Function ksdazzle_net_close (dev)
485  *
486  *    Network device is taken down. Usually this is done by
487  *    "ifconfig irda0 down"
488  */
489 static int ksdazzle_net_close(struct net_device *netdev)
490 {
491         struct ksdazzle_cb *kingsun = netdev_priv(netdev);
492
493         /* Stop transmit processing */
494         netif_stop_queue(netdev);
495
496         /* Mop up receive && transmit urb's */
497         usb_kill_urb(kingsun->tx_urb);
498         usb_free_urb(kingsun->tx_urb);
499         kingsun->tx_urb = NULL;
500
501         usb_kill_urb(kingsun->speed_urb);
502         usb_free_urb(kingsun->speed_urb);
503         kingsun->speed_urb = NULL;
504
505         usb_kill_urb(kingsun->rx_urb);
506         usb_free_urb(kingsun->rx_urb);
507         kingsun->rx_urb = NULL;
508
509         kfree_skb(kingsun->rx_unwrap_buff.skb);
510         kingsun->rx_unwrap_buff.skb = NULL;
511         kingsun->rx_unwrap_buff.head = NULL;
512         kingsun->rx_unwrap_buff.in_frame = FALSE;
513         kingsun->rx_unwrap_buff.state = OUTSIDE_FRAME;
514         kingsun->receiving = 0;
515
516         /* Stop and remove instance of IrLAP */
517         irlap_close(kingsun->irlap);
518
519         kingsun->irlap = NULL;
520
521         return 0;
522 }
523
524 /*
525  * IOCTLs : Extra out-of-band network commands...
526  */
527 static int ksdazzle_net_ioctl(struct net_device *netdev, struct ifreq *rq,
528                               int cmd)
529 {
530         struct if_irda_req *irq = (struct if_irda_req *)rq;
531         struct ksdazzle_cb *kingsun = netdev_priv(netdev);
532         int ret = 0;
533
534         switch (cmd) {
535         case SIOCSBANDWIDTH:    /* Set bandwidth */
536                 if (!capable(CAP_NET_ADMIN))
537                         return -EPERM;
538
539                 /* Check if the device is still there */
540                 if (netif_device_present(kingsun->netdev))
541                         return ksdazzle_change_speed(kingsun,
542                                                      irq->ifr_baudrate);
543                 break;
544
545         case SIOCSMEDIABUSY:    /* Set media busy */
546                 if (!capable(CAP_NET_ADMIN))
547                         return -EPERM;
548
549                 /* Check if the IrDA stack is still there */
550                 if (netif_running(kingsun->netdev))
551                         irda_device_set_media_busy(kingsun->netdev, TRUE);
552                 break;
553
554         case SIOCGRECEIVING:
555                 /* Only approximately true */
556                 irq->ifr_receiving = kingsun->receiving;
557                 break;
558
559         default:
560                 ret = -EOPNOTSUPP;
561         }
562
563         return ret;
564 }
565
566 /*
567  * Get device stats (for /proc/net/dev and ifconfig)
568  */
569 static struct net_device_stats *ksdazzle_net_get_stats(struct net_device
570                                                        *netdev)
571 {
572         struct ksdazzle_cb *kingsun = netdev_priv(netdev);
573         return &kingsun->stats;
574 }
575
576 /*
577  * This routine is called by the USB subsystem for each new device
578  * in the system. We need to check if the device is ours, and in
579  * this case start handling it.
580  */
581 static int ksdazzle_probe(struct usb_interface *intf,
582                           const struct usb_device_id *id)
583 {
584         struct usb_host_interface *interface;
585         struct usb_endpoint_descriptor *endpoint;
586
587         struct usb_device *dev = interface_to_usbdev(intf);
588         struct ksdazzle_cb *kingsun = NULL;
589         struct net_device *net = NULL;
590         int ret = -ENOMEM;
591         int pipe, maxp_in, maxp_out;
592         __u8 ep_in;
593         __u8 ep_out;
594
595         /* Check that there really are two interrupt endpoints. Check based on the
596            one in drivers/usb/input/usbmouse.c
597          */
598         interface = intf->cur_altsetting;
599         if (interface->desc.bNumEndpoints != 2) {
600                 err("ksdazzle: expected 2 endpoints, found %d",
601                     interface->desc.bNumEndpoints);
602                 return -ENODEV;
603         }
604         endpoint = &interface->endpoint[KINGSUN_EP_IN].desc;
605         if (!usb_endpoint_is_int_in(endpoint)) {
606                 err("ksdazzle: endpoint 0 is not interrupt IN");
607                 return -ENODEV;
608         }
609
610         ep_in = endpoint->bEndpointAddress;
611         pipe = usb_rcvintpipe(dev, ep_in);
612         maxp_in = usb_maxpacket(dev, pipe, usb_pipeout(pipe));
613         if (maxp_in > 255 || maxp_in <= 1) {
614                 err("ksdazzle: endpoint 0 has max packet size %d not in range [2..255]", maxp_in);
615                 return -ENODEV;
616         }
617
618         endpoint = &interface->endpoint[KINGSUN_EP_OUT].desc;
619         if (!usb_endpoint_is_int_out(endpoint)) {
620                 err("ksdazzle: endpoint 1 is not interrupt OUT");
621                 return -ENODEV;
622         }
623
624         ep_out = endpoint->bEndpointAddress;
625         pipe = usb_sndintpipe(dev, ep_out);
626         maxp_out = usb_maxpacket(dev, pipe, usb_pipeout(pipe));
627
628         /* Allocate network device container. */
629         net = alloc_irdadev(sizeof(*kingsun));
630         if (!net)
631                 goto err_out1;
632
633         SET_NETDEV_DEV(net, &intf->dev);
634         kingsun = netdev_priv(net);
635         kingsun->netdev = net;
636         kingsun->usbdev = dev;
637         kingsun->ep_in = ep_in;
638         kingsun->ep_out = ep_out;
639         kingsun->irlap = NULL;
640         kingsun->tx_urb = NULL;
641         kingsun->tx_buf_clear = NULL;
642         kingsun->tx_buf_clear_used = 0;
643         kingsun->tx_buf_clear_sent = 0;
644
645         kingsun->rx_urb = NULL;
646         kingsun->rx_buf = NULL;
647         kingsun->rx_unwrap_buff.in_frame = FALSE;
648         kingsun->rx_unwrap_buff.state = OUTSIDE_FRAME;
649         kingsun->rx_unwrap_buff.skb = NULL;
650         kingsun->receiving = 0;
651         spin_lock_init(&kingsun->lock);
652
653         kingsun->speed_setuprequest = NULL;
654         kingsun->speed_urb = NULL;
655         kingsun->speedparams.baudrate = 0;
656
657         /* Allocate input buffer */
658         kingsun->rx_buf = kmalloc(KINGSUN_RCV_MAX, GFP_KERNEL);
659         if (!kingsun->rx_buf)
660                 goto free_mem;
661
662         /* Allocate output buffer */
663         kingsun->tx_buf_clear = kmalloc(KINGSUN_SND_FIFO_SIZE, GFP_KERNEL);
664         if (!kingsun->tx_buf_clear)
665                 goto free_mem;
666
667         /* Allocate and initialize speed setup packet */
668         kingsun->speed_setuprequest =
669             kmalloc(sizeof(struct usb_ctrlrequest), GFP_KERNEL);
670         if (!kingsun->speed_setuprequest)
671                 goto free_mem;
672         kingsun->speed_setuprequest->bRequestType =
673             USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE;
674         kingsun->speed_setuprequest->bRequest = KINGSUN_REQ_SEND;
675         kingsun->speed_setuprequest->wValue = cpu_to_le16(0x0200);
676         kingsun->speed_setuprequest->wIndex = cpu_to_le16(0x0001);
677         kingsun->speed_setuprequest->wLength =
678             cpu_to_le16(sizeof(struct ksdazzle_speedparams));
679
680         printk(KERN_INFO "KingSun/Dazzle IRDA/USB found at address %d, "
681                "Vendor: %x, Product: %x\n",
682                dev->devnum, le16_to_cpu(dev->descriptor.idVendor),
683                le16_to_cpu(dev->descriptor.idProduct));
684
685         /* Initialize QoS for this device */
686         irda_init_max_qos_capabilies(&kingsun->qos);
687
688         /* Baud rates known to be supported. Please uncomment if devices (other
689            than a SonyEriccson K300 phone) can be shown to support higher speeds
690            with this dongle.
691          */
692         kingsun->qos.baud_rate.bits =
693             IR_2400 | IR_9600 | IR_19200 | IR_38400 | IR_57600 | IR_115200;
694         kingsun->qos.min_turn_time.bits &= KINGSUN_MTT;
695         irda_qos_bits_to_value(&kingsun->qos);
696
697         /* Override the network functions we need to use */
698         net->hard_start_xmit = ksdazzle_hard_xmit;
699         net->open = ksdazzle_net_open;
700         net->stop = ksdazzle_net_close;
701         net->get_stats = ksdazzle_net_get_stats;
702         net->do_ioctl = ksdazzle_net_ioctl;
703
704         ret = register_netdev(net);
705         if (ret != 0)
706                 goto free_mem;
707
708         dev_info(&net->dev, "IrDA: Registered KingSun/Dazzle device %s\n",
709                  net->name);
710
711         usb_set_intfdata(intf, kingsun);
712
713         /* Situation at this point:
714            - all work buffers allocated
715            - setup requests pre-filled
716            - urbs not allocated, set to NULL
717            - max rx packet known (is KINGSUN_FIFO_SIZE)
718            - unwrap state machine (partially) initialized, but skb == NULL
719          */
720
721         return 0;
722
723       free_mem:
724         kfree(kingsun->speed_setuprequest);
725         kfree(kingsun->tx_buf_clear);
726         kfree(kingsun->rx_buf);
727         free_netdev(net);
728       err_out1:
729         return ret;
730 }
731
732 /*
733  * The current device is removed, the USB layer tell us to shut it down...
734  */
735 static void ksdazzle_disconnect(struct usb_interface *intf)
736 {
737         struct ksdazzle_cb *kingsun = usb_get_intfdata(intf);
738
739         if (!kingsun)
740                 return;
741
742         unregister_netdev(kingsun->netdev);
743
744         /* Mop up receive && transmit urb's */
745         usb_kill_urb(kingsun->speed_urb);
746         usb_free_urb(kingsun->speed_urb);
747         kingsun->speed_urb = NULL;
748
749         usb_kill_urb(kingsun->tx_urb);
750         usb_free_urb(kingsun->tx_urb);
751         kingsun->tx_urb = NULL;
752
753         usb_kill_urb(kingsun->rx_urb);
754         usb_free_urb(kingsun->rx_urb);
755         kingsun->rx_urb = NULL;
756
757         kfree(kingsun->speed_setuprequest);
758         kfree(kingsun->tx_buf_clear);
759         kfree(kingsun->rx_buf);
760         free_netdev(kingsun->netdev);
761
762         usb_set_intfdata(intf, NULL);
763 }
764
765 #ifdef CONFIG_PM
766 /* USB suspend, so power off the transmitter/receiver */
767 static int ksdazzle_suspend(struct usb_interface *intf, pm_message_t message)
768 {
769         struct ksdazzle_cb *kingsun = usb_get_intfdata(intf);
770
771         netif_device_detach(kingsun->netdev);
772         if (kingsun->speed_urb != NULL)
773                 usb_kill_urb(kingsun->speed_urb);
774         if (kingsun->tx_urb != NULL)
775                 usb_kill_urb(kingsun->tx_urb);
776         if (kingsun->rx_urb != NULL)
777                 usb_kill_urb(kingsun->rx_urb);
778         return 0;
779 }
780
781 /* Coming out of suspend, so reset hardware */
782 static int ksdazzle_resume(struct usb_interface *intf)
783 {
784         struct ksdazzle_cb *kingsun = usb_get_intfdata(intf);
785
786         if (kingsun->rx_urb != NULL) {
787                 /* Setup request already filled in ksdazzle_probe */
788                 usb_submit_urb(kingsun->rx_urb, GFP_KERNEL);
789         }
790         netif_device_attach(kingsun->netdev);
791
792         return 0;
793 }
794 #endif
795
796 /*
797  * USB device callbacks
798  */
799 static struct usb_driver irda_driver = {
800         .name = "ksdazzle-sir",
801         .probe = ksdazzle_probe,
802         .disconnect = ksdazzle_disconnect,
803         .id_table = dongles,
804 #ifdef CONFIG_PM
805         .suspend = ksdazzle_suspend,
806         .resume = ksdazzle_resume,
807 #endif
808 };
809
810 /*
811  * Module insertion
812  */
813 static int __init ksdazzle_init(void)
814 {
815         return usb_register(&irda_driver);
816 }
817
818 module_init(ksdazzle_init);
819
820 /*
821  * Module removal
822  */
823 static void __exit ksdazzle_cleanup(void)
824 {
825         /* Deregister the driver and remove all pending instances */
826         usb_deregister(&irda_driver);
827 }
828
829 module_exit(ksdazzle_cleanup);
830
831 MODULE_AUTHOR("Alex Villacís Lasso <a_villacis@palosanto.com>");
832 MODULE_DESCRIPTION("IrDA-USB Dongle Driver for KingSun Dazzle");
833 MODULE_LICENSE("GPL");