irda: convert to netdev_tx_t
[linux-2.6.git] / drivers / net / irda / ksdazzle-sir.c
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/kref.h>
86 #include <linux/usb.h>
87 #include <linux/device.h>
88 #include <linux/crc32.h>
89
90 #include <asm/unaligned.h>
91 #include <asm/byteorder.h>
92 #include <asm/uaccess.h>
93
94 #include <net/irda/irda.h>
95 #include <net/irda/wrapper.h>
96 #include <net/irda/crc.h>
97
98 #define KSDAZZLE_VENDOR_ID 0x07d0
99 #define KSDAZZLE_PRODUCT_ID 0x4100
100
101 /* These are the currently known USB ids */
102 static struct usb_device_id dongles[] = {
103         /* KingSun Co,Ltd  IrDA/USB Bridge */
104         {USB_DEVICE(KSDAZZLE_VENDOR_ID, KSDAZZLE_PRODUCT_ID)},
105         {}
106 };
107
108 MODULE_DEVICE_TABLE(usb, dongles);
109
110 #define KINGSUN_MTT 0x07
111 #define KINGSUN_REQ_RECV 0x01
112 #define KINGSUN_REQ_SEND 0x09
113
114 #define KINGSUN_SND_FIFO_SIZE    2048   /* Max packet we can send */
115 #define KINGSUN_RCV_MAX 2048    /* Max transfer we can receive */
116
117 struct ksdazzle_speedparams {
118         __le32 baudrate;        /* baud rate, little endian */
119         __u8 flags;
120         __u8 reserved[3];
121 } __attribute__ ((packed));
122
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
127
128 #define KS_STOP_BITS_1 0x00
129 #define KS_STOP_BITS_2 0x08
130
131 #define KS_PAR_DISABLE    0x00
132 #define KS_PAR_EVEN    0x10
133 #define KS_PAR_ODD    0x30
134 #define KS_RESET    0x80
135
136 #define KINGSUN_EP_IN                   0
137 #define KINGSUN_EP_OUT                  1
138
139 struct ksdazzle_cb {
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
144         struct qos_info qos;
145
146         struct urb *tx_urb;
147         __u8 *tx_buf_clear;
148         unsigned int tx_buf_clear_used;
149         unsigned int tx_buf_clear_sent;
150         __u8 tx_payload[8];
151
152         struct urb *rx_urb;
153         __u8 *rx_buf;
154         iobuff_t rx_unwrap_buff;
155
156         struct usb_ctrlrequest *speed_setuprequest;
157         struct urb *speed_urb;
158         struct ksdazzle_speedparams speedparams;
159         unsigned int new_speed;
160
161         __u8 ep_in;
162         __u8 ep_out;
163
164         spinlock_t lock;
165         int receiving;
166 };
167
168 /* Callback transmission routine */
169 static void ksdazzle_speed_irq(struct urb *urb)
170 {
171         /* unlink, shutdown, unplug, other nasties */
172         if (urb->status != 0) {
173                 err("ksdazzle_speed_irq: urb asynchronously failed - %d",
174                     urb->status);
175         }
176 }
177
178 /* Send a control request to change speed of the dongle */
179 static int ksdazzle_change_speed(struct ksdazzle_cb *kingsun, unsigned speed)
180 {
181         static unsigned int supported_speeds[] = { 2400, 9600, 19200, 38400,
182                 57600, 115200, 576000, 1152000, 4000000, 0
183         };
184         int err;
185         unsigned int i;
186
187         if (kingsun->speed_setuprequest == NULL || kingsun->speed_urb == NULL)
188                 return -ENOMEM;
189
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)
193                 return -EOPNOTSUPP;
194
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;
198
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);
208
209         return err;
210 }
211
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)
215 {
216         unsigned int wraplen;
217         int ret;
218
219         /* We can send at most 7 bytes of payload at a time */
220         wraplen = 7;
221         if (wraplen > kingsun->tx_buf_clear_used)
222                 wraplen = kingsun->tx_buf_clear_used;
223
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);
228
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);
234
235         /* Remember how much data was sent, in order to update at callback */
236         kingsun->tx_buf_clear_sent = (ret == 0) ? wraplen : 0;
237         return ret;
238 }
239
240 /* Callback transmission routine */
241 static void ksdazzle_send_irq(struct urb *urb)
242 {
243         struct ksdazzle_cb *kingsun = urb->context;
244         struct net_device *netdev = kingsun->netdev;
245         int ret = 0;
246
247         /* in process of stopping, just drop data */
248         if (!netif_running(kingsun->netdev)) {
249                 err("ksdazzle_send_irq: Network not running!");
250                 return;
251         }
252
253         /* unlink, shutdown, unplug, other nasties */
254         if (urb->status != 0) {
255                 err("ksdazzle_send_irq: urb asynchronously failed - %d",
256                     urb->status);
257                 return;
258         }
259
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);
268                 }
269                 kingsun->tx_buf_clear_used -= kingsun->tx_buf_clear_sent;
270                 kingsun->tx_buf_clear_sent = 0;
271
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);
276                                 switch (ret) {
277                                 case -ENODEV:
278                                 case -EPIPE:
279                                         break;
280                                 default:
281                                         netdev->stats.tx_errors++;
282                                         netif_start_queue(netdev);
283                                 }
284                         }
285                 } else {
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,
291                                                       kingsun->new_speed);
292
293                         netif_wake_queue(netdev);
294                 }
295         }
296 }
297
298 /*
299  * Called from net/core when new frame is available.
300  */
301 static netdev_tx_t ksdazzle_hard_xmit(struct sk_buff *skb,
302                                             struct net_device *netdev)
303 {
304         struct ksdazzle_cb *kingsun;
305         unsigned int wraplen;
306         int ret = 0;
307
308         netif_stop_queue(netdev);
309
310         /* the IRDA wrapping routines don't deal with non linear skb */
311         SKB_LINEAR_ASSERT(skb);
312
313         kingsun = netdev_priv(netdev);
314
315         spin_lock(&kingsun->lock);
316         kingsun->new_speed = irda_get_next_speed(skb);
317
318         /* Append data to the end of whatever data remains to be transmitted */
319         wraplen =
320             async_wrap_skb(skb, kingsun->tx_buf_clear, KINGSUN_SND_FIFO_SIZE);
321         kingsun->tx_buf_clear_used = wraplen;
322
323         if ((ret = ksdazzle_submit_tx_fragment(kingsun)) != 0) {
324                 err("ksdazzle_hard_xmit: failed tx_urb submit: %d", ret);
325                 switch (ret) {
326                 case -ENODEV:
327                 case -EPIPE:
328                         break;
329                 default:
330                         netdev->stats.tx_errors++;
331                         netif_start_queue(netdev);
332                 }
333         } else {
334                 netdev->stats.tx_packets++;
335                 netdev->stats.tx_bytes += skb->len;
336
337         }
338
339         dev_kfree_skb(skb);
340         spin_unlock(&kingsun->lock);
341
342         return NETDEV_TX_OK;
343 }
344
345 /* Receive callback function */
346 static void ksdazzle_rcv_irq(struct urb *urb)
347 {
348         struct ksdazzle_cb *kingsun = urb->context;
349         struct net_device *netdev = kingsun->netdev;
350
351         /* in process of stopping, just drop data */
352         if (!netif_running(netdev)) {
353                 kingsun->receiving = 0;
354                 return;
355         }
356
357         /* unlink, shutdown, unplug, other nasties */
358         if (urb->status != 0) {
359                 err("ksdazzle_rcv_irq: urb asynchronously failed - %d",
360                     urb->status);
361                 kingsun->receiving = 0;
362                 return;
363         }
364
365         if (urb->actual_length > 0) {
366                 __u8 *bytes = urb->transfer_buffer;
367                 unsigned int i;
368
369                 for (i = 0; i < urb->actual_length; i++) {
370                         async_unwrap_char(netdev, &netdev->stats,
371                                           &kingsun->rx_unwrap_buff, bytes[i]);
372                 }
373                 kingsun->receiving =
374                     (kingsun->rx_unwrap_buff.state != OUTSIDE_FRAME) ? 1 : 0;
375         }
376
377         /* This urb has already been filled in ksdazzle_net_open. It is assumed that
378            urb keeps the pointer to the payload buffer.
379          */
380         urb->status = 0;
381         usb_submit_urb(urb, GFP_ATOMIC);
382 }
383
384 /*
385  * Function ksdazzle_net_open (dev)
386  *
387  *    Network device is taken up. Usually this is done by "ifconfig irda0 up"
388  */
389 static int ksdazzle_net_open(struct net_device *netdev)
390 {
391         struct ksdazzle_cb *kingsun = netdev_priv(netdev);
392         int err = -ENOMEM;
393         char hwname[16];
394
395         /* At this point, urbs are NULL, and skb is NULL (see ksdazzle_probe) */
396         kingsun->receiving = 0;
397
398         /* Initialize for SIR to copy data directly into skb.  */
399         kingsun->rx_unwrap_buff.in_frame = FALSE;
400         kingsun->rx_unwrap_buff.state = OUTSIDE_FRAME;
401         kingsun->rx_unwrap_buff.truesize = IRDA_SKB_MAX_MTU;
402         kingsun->rx_unwrap_buff.skb = dev_alloc_skb(IRDA_SKB_MAX_MTU);
403         if (!kingsun->rx_unwrap_buff.skb)
404                 goto free_mem;
405
406         skb_reserve(kingsun->rx_unwrap_buff.skb, 1);
407         kingsun->rx_unwrap_buff.head = kingsun->rx_unwrap_buff.skb->data;
408
409         kingsun->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
410         if (!kingsun->rx_urb)
411                 goto free_mem;
412
413         kingsun->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
414         if (!kingsun->tx_urb)
415                 goto free_mem;
416
417         kingsun->speed_urb = usb_alloc_urb(0, GFP_KERNEL);
418         if (!kingsun->speed_urb)
419                 goto free_mem;
420
421         /* Initialize speed for dongle */
422         kingsun->new_speed = 9600;
423         err = ksdazzle_change_speed(kingsun, 9600);
424         if (err < 0)
425                 goto free_mem;
426
427         /*
428          * Now that everything should be initialized properly,
429          * Open new IrLAP layer instance to take care of us...
430          */
431         sprintf(hwname, "usb#%d", kingsun->usbdev->devnum);
432         kingsun->irlap = irlap_open(netdev, &kingsun->qos, hwname);
433         if (!kingsun->irlap) {
434                 err("ksdazzle-sir: irlap_open failed");
435                 goto free_mem;
436         }
437
438         /* Start reception. */
439         usb_fill_int_urb(kingsun->rx_urb, kingsun->usbdev,
440                          usb_rcvintpipe(kingsun->usbdev, kingsun->ep_in),
441                          kingsun->rx_buf, KINGSUN_RCV_MAX, ksdazzle_rcv_irq,
442                          kingsun, 1);
443         kingsun->rx_urb->status = 0;
444         err = usb_submit_urb(kingsun->rx_urb, GFP_KERNEL);
445         if (err) {
446                 err("ksdazzle-sir: first urb-submit failed: %d", err);
447                 goto close_irlap;
448         }
449
450         netif_start_queue(netdev);
451
452         /* Situation at this point:
453            - all work buffers allocated
454            - urbs allocated and ready to fill
455            - max rx packet known (in max_rx)
456            - unwrap state machine initialized, in state outside of any frame
457            - receive request in progress
458            - IrLAP layer started, about to hand over packets to send
459          */
460
461         return 0;
462
463       close_irlap:
464         irlap_close(kingsun->irlap);
465       free_mem:
466         usb_free_urb(kingsun->speed_urb);
467         kingsun->speed_urb = NULL;
468         usb_free_urb(kingsun->tx_urb);
469         kingsun->tx_urb = NULL;
470         usb_free_urb(kingsun->rx_urb);
471         kingsun->rx_urb = NULL;
472         if (kingsun->rx_unwrap_buff.skb) {
473                 kfree_skb(kingsun->rx_unwrap_buff.skb);
474                 kingsun->rx_unwrap_buff.skb = NULL;
475                 kingsun->rx_unwrap_buff.head = NULL;
476         }
477         return err;
478 }
479
480 /*
481  * Function ksdazzle_net_close (dev)
482  *
483  *    Network device is taken down. Usually this is done by
484  *    "ifconfig irda0 down"
485  */
486 static int ksdazzle_net_close(struct net_device *netdev)
487 {
488         struct ksdazzle_cb *kingsun = netdev_priv(netdev);
489
490         /* Stop transmit processing */
491         netif_stop_queue(netdev);
492
493         /* Mop up receive && transmit urb's */
494         usb_kill_urb(kingsun->tx_urb);
495         usb_free_urb(kingsun->tx_urb);
496         kingsun->tx_urb = NULL;
497
498         usb_kill_urb(kingsun->speed_urb);
499         usb_free_urb(kingsun->speed_urb);
500         kingsun->speed_urb = NULL;
501
502         usb_kill_urb(kingsun->rx_urb);
503         usb_free_urb(kingsun->rx_urb);
504         kingsun->rx_urb = NULL;
505
506         kfree_skb(kingsun->rx_unwrap_buff.skb);
507         kingsun->rx_unwrap_buff.skb = NULL;
508         kingsun->rx_unwrap_buff.head = NULL;
509         kingsun->rx_unwrap_buff.in_frame = FALSE;
510         kingsun->rx_unwrap_buff.state = OUTSIDE_FRAME;
511         kingsun->receiving = 0;
512
513         /* Stop and remove instance of IrLAP */
514         irlap_close(kingsun->irlap);
515
516         kingsun->irlap = NULL;
517
518         return 0;
519 }
520
521 /*
522  * IOCTLs : Extra out-of-band network commands...
523  */
524 static int ksdazzle_net_ioctl(struct net_device *netdev, struct ifreq *rq,
525                               int cmd)
526 {
527         struct if_irda_req *irq = (struct if_irda_req *)rq;
528         struct ksdazzle_cb *kingsun = netdev_priv(netdev);
529         int ret = 0;
530
531         switch (cmd) {
532         case SIOCSBANDWIDTH:    /* Set bandwidth */
533                 if (!capable(CAP_NET_ADMIN))
534                         return -EPERM;
535
536                 /* Check if the device is still there */
537                 if (netif_device_present(kingsun->netdev))
538                         return ksdazzle_change_speed(kingsun,
539                                                      irq->ifr_baudrate);
540                 break;
541
542         case SIOCSMEDIABUSY:    /* Set media busy */
543                 if (!capable(CAP_NET_ADMIN))
544                         return -EPERM;
545
546                 /* Check if the IrDA stack is still there */
547                 if (netif_running(kingsun->netdev))
548                         irda_device_set_media_busy(kingsun->netdev, TRUE);
549                 break;
550
551         case SIOCGRECEIVING:
552                 /* Only approximately true */
553                 irq->ifr_receiving = kingsun->receiving;
554                 break;
555
556         default:
557                 ret = -EOPNOTSUPP;
558         }
559
560         return ret;
561 }
562
563 static const struct net_device_ops ksdazzle_ops = {
564         .ndo_start_xmit = ksdazzle_hard_xmit,
565         .ndo_open       = ksdazzle_net_open,
566         .ndo_stop       = ksdazzle_net_close,
567         .ndo_do_ioctl   = ksdazzle_net_ioctl,
568 };
569
570 /*
571  * This routine is called by the USB subsystem for each new device
572  * in the system. We need to check if the device is ours, and in
573  * this case start handling it.
574  */
575 static int ksdazzle_probe(struct usb_interface *intf,
576                           const struct usb_device_id *id)
577 {
578         struct usb_host_interface *interface;
579         struct usb_endpoint_descriptor *endpoint;
580
581         struct usb_device *dev = interface_to_usbdev(intf);
582         struct ksdazzle_cb *kingsun = NULL;
583         struct net_device *net = NULL;
584         int ret = -ENOMEM;
585         int pipe, maxp_in, maxp_out;
586         __u8 ep_in;
587         __u8 ep_out;
588
589         /* Check that there really are two interrupt endpoints. Check based on the
590            one in drivers/usb/input/usbmouse.c
591          */
592         interface = intf->cur_altsetting;
593         if (interface->desc.bNumEndpoints != 2) {
594                 err("ksdazzle: expected 2 endpoints, found %d",
595                     interface->desc.bNumEndpoints);
596                 return -ENODEV;
597         }
598         endpoint = &interface->endpoint[KINGSUN_EP_IN].desc;
599         if (!usb_endpoint_is_int_in(endpoint)) {
600                 err("ksdazzle: endpoint 0 is not interrupt IN");
601                 return -ENODEV;
602         }
603
604         ep_in = endpoint->bEndpointAddress;
605         pipe = usb_rcvintpipe(dev, ep_in);
606         maxp_in = usb_maxpacket(dev, pipe, usb_pipeout(pipe));
607         if (maxp_in > 255 || maxp_in <= 1) {
608                 err("ksdazzle: endpoint 0 has max packet size %d not in range [2..255]", maxp_in);
609                 return -ENODEV;
610         }
611
612         endpoint = &interface->endpoint[KINGSUN_EP_OUT].desc;
613         if (!usb_endpoint_is_int_out(endpoint)) {
614                 err("ksdazzle: endpoint 1 is not interrupt OUT");
615                 return -ENODEV;
616         }
617
618         ep_out = endpoint->bEndpointAddress;
619         pipe = usb_sndintpipe(dev, ep_out);
620         maxp_out = usb_maxpacket(dev, pipe, usb_pipeout(pipe));
621
622         /* Allocate network device container. */
623         net = alloc_irdadev(sizeof(*kingsun));
624         if (!net)
625                 goto err_out1;
626
627         SET_NETDEV_DEV(net, &intf->dev);
628         kingsun = netdev_priv(net);
629         kingsun->netdev = net;
630         kingsun->usbdev = dev;
631         kingsun->ep_in = ep_in;
632         kingsun->ep_out = ep_out;
633         kingsun->irlap = NULL;
634         kingsun->tx_urb = NULL;
635         kingsun->tx_buf_clear = NULL;
636         kingsun->tx_buf_clear_used = 0;
637         kingsun->tx_buf_clear_sent = 0;
638
639         kingsun->rx_urb = NULL;
640         kingsun->rx_buf = NULL;
641         kingsun->rx_unwrap_buff.in_frame = FALSE;
642         kingsun->rx_unwrap_buff.state = OUTSIDE_FRAME;
643         kingsun->rx_unwrap_buff.skb = NULL;
644         kingsun->receiving = 0;
645         spin_lock_init(&kingsun->lock);
646
647         kingsun->speed_setuprequest = NULL;
648         kingsun->speed_urb = NULL;
649         kingsun->speedparams.baudrate = 0;
650
651         /* Allocate input buffer */
652         kingsun->rx_buf = kmalloc(KINGSUN_RCV_MAX, GFP_KERNEL);
653         if (!kingsun->rx_buf)
654                 goto free_mem;
655
656         /* Allocate output buffer */
657         kingsun->tx_buf_clear = kmalloc(KINGSUN_SND_FIFO_SIZE, GFP_KERNEL);
658         if (!kingsun->tx_buf_clear)
659                 goto free_mem;
660
661         /* Allocate and initialize speed setup packet */
662         kingsun->speed_setuprequest =
663             kmalloc(sizeof(struct usb_ctrlrequest), GFP_KERNEL);
664         if (!kingsun->speed_setuprequest)
665                 goto free_mem;
666         kingsun->speed_setuprequest->bRequestType =
667             USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE;
668         kingsun->speed_setuprequest->bRequest = KINGSUN_REQ_SEND;
669         kingsun->speed_setuprequest->wValue = cpu_to_le16(0x0200);
670         kingsun->speed_setuprequest->wIndex = cpu_to_le16(0x0001);
671         kingsun->speed_setuprequest->wLength =
672             cpu_to_le16(sizeof(struct ksdazzle_speedparams));
673
674         printk(KERN_INFO "KingSun/Dazzle IRDA/USB found at address %d, "
675                "Vendor: %x, Product: %x\n",
676                dev->devnum, le16_to_cpu(dev->descriptor.idVendor),
677                le16_to_cpu(dev->descriptor.idProduct));
678
679         /* Initialize QoS for this device */
680         irda_init_max_qos_capabilies(&kingsun->qos);
681
682         /* Baud rates known to be supported. Please uncomment if devices (other
683            than a SonyEriccson K300 phone) can be shown to support higher speeds
684            with this dongle.
685          */
686         kingsun->qos.baud_rate.bits =
687             IR_2400 | IR_9600 | IR_19200 | IR_38400 | IR_57600 | IR_115200;
688         kingsun->qos.min_turn_time.bits &= KINGSUN_MTT;
689         irda_qos_bits_to_value(&kingsun->qos);
690
691         /* Override the network functions we need to use */
692         net->netdev_ops = &ksdazzle_ops;
693
694         ret = register_netdev(net);
695         if (ret != 0)
696                 goto free_mem;
697
698         dev_info(&net->dev, "IrDA: Registered KingSun/Dazzle device %s\n",
699                  net->name);
700
701         usb_set_intfdata(intf, kingsun);
702
703         /* Situation at this point:
704            - all work buffers allocated
705            - setup requests pre-filled
706            - urbs not allocated, set to NULL
707            - max rx packet known (is KINGSUN_FIFO_SIZE)
708            - unwrap state machine (partially) initialized, but skb == NULL
709          */
710
711         return 0;
712
713       free_mem:
714         kfree(kingsun->speed_setuprequest);
715         kfree(kingsun->tx_buf_clear);
716         kfree(kingsun->rx_buf);
717         free_netdev(net);
718       err_out1:
719         return ret;
720 }
721
722 /*
723  * The current device is removed, the USB layer tell us to shut it down...
724  */
725 static void ksdazzle_disconnect(struct usb_interface *intf)
726 {
727         struct ksdazzle_cb *kingsun = usb_get_intfdata(intf);
728
729         if (!kingsun)
730                 return;
731
732         unregister_netdev(kingsun->netdev);
733
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;
738
739         usb_kill_urb(kingsun->tx_urb);
740         usb_free_urb(kingsun->tx_urb);
741         kingsun->tx_urb = NULL;
742
743         usb_kill_urb(kingsun->rx_urb);
744         usb_free_urb(kingsun->rx_urb);
745         kingsun->rx_urb = NULL;
746
747         kfree(kingsun->speed_setuprequest);
748         kfree(kingsun->tx_buf_clear);
749         kfree(kingsun->rx_buf);
750         free_netdev(kingsun->netdev);
751
752         usb_set_intfdata(intf, NULL);
753 }
754
755 #ifdef CONFIG_PM
756 /* USB suspend, so power off the transmitter/receiver */
757 static int ksdazzle_suspend(struct usb_interface *intf, pm_message_t message)
758 {
759         struct ksdazzle_cb *kingsun = usb_get_intfdata(intf);
760
761         netif_device_detach(kingsun->netdev);
762         if (kingsun->speed_urb != NULL)
763                 usb_kill_urb(kingsun->speed_urb);
764         if (kingsun->tx_urb != NULL)
765                 usb_kill_urb(kingsun->tx_urb);
766         if (kingsun->rx_urb != NULL)
767                 usb_kill_urb(kingsun->rx_urb);
768         return 0;
769 }
770
771 /* Coming out of suspend, so reset hardware */
772 static int ksdazzle_resume(struct usb_interface *intf)
773 {
774         struct ksdazzle_cb *kingsun = usb_get_intfdata(intf);
775
776         if (kingsun->rx_urb != NULL) {
777                 /* Setup request already filled in ksdazzle_probe */
778                 usb_submit_urb(kingsun->rx_urb, GFP_KERNEL);
779         }
780         netif_device_attach(kingsun->netdev);
781
782         return 0;
783 }
784 #endif
785
786 /*
787  * USB device callbacks
788  */
789 static struct usb_driver irda_driver = {
790         .name = "ksdazzle-sir",
791         .probe = ksdazzle_probe,
792         .disconnect = ksdazzle_disconnect,
793         .id_table = dongles,
794 #ifdef CONFIG_PM
795         .suspend = ksdazzle_suspend,
796         .resume = ksdazzle_resume,
797 #endif
798 };
799
800 /*
801  * Module insertion
802  */
803 static int __init ksdazzle_init(void)
804 {
805         return usb_register(&irda_driver);
806 }
807
808 module_init(ksdazzle_init);
809
810 /*
811  * Module removal
812  */
813 static void __exit ksdazzle_cleanup(void)
814 {
815         /* Deregister the driver and remove all pending instances */
816         usb_deregister(&irda_driver);
817 }
818
819 module_exit(ksdazzle_cleanup);
820
821 MODULE_AUTHOR("Alex Villacís Lasso <a_villacis@palosanto.com>");
822 MODULE_DESCRIPTION("IrDA-USB Dongle Driver for KingSun Dazzle");
823 MODULE_LICENSE("GPL");