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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/usb.h>
86#include <linux/device.h>
87#include <linux/crc32.h>
88
89#include <asm/unaligned.h>
90#include <asm/byteorder.h>
91#include <asm/uaccess.h>
92
93#include <net/irda/irda.h>
94#include <net/irda/wrapper.h>
95#include <net/irda/crc.h>
96
97#define KSDAZZLE_VENDOR_ID 0x07d0
98#define KSDAZZLE_PRODUCT_ID 0x4100
99
100/* These are the currently known USB ids */
101static struct usb_device_id dongles[] = {
102 /* KingSun Co,Ltd IrDA/USB Bridge */
103 {USB_DEVICE(KSDAZZLE_VENDOR_ID, KSDAZZLE_PRODUCT_ID)},
104 {}
105};
106
107MODULE_DEVICE_TABLE(usb, dongles);
108
109#define KINGSUN_MTT 0x07
110#define KINGSUN_REQ_RECV 0x01
111#define KINGSUN_REQ_SEND 0x09
112
113#define KINGSUN_SND_FIFO_SIZE 2048 /* Max packet we can send */
114#define KINGSUN_RCV_MAX 2048 /* Max transfer we can receive */
115
116struct ksdazzle_speedparams {
117 __le32 baudrate; /* baud rate, little endian */
118 __u8 flags;
119 __u8 reserved[3];
120} __packed;
121
122#define KS_DATA_5_BITS 0x00
123#define KS_DATA_6_BITS 0x01
124#define KS_DATA_7_BITS 0x02
125#define KS_DATA_8_BITS 0x03
126
127#define KS_STOP_BITS_1 0x00
128#define KS_STOP_BITS_2 0x08
129
130#define KS_PAR_DISABLE 0x00
131#define KS_PAR_EVEN 0x10
132#define KS_PAR_ODD 0x30
133#define KS_RESET 0x80
134
135#define KINGSUN_EP_IN 0
136#define KINGSUN_EP_OUT 1
137
138struct ksdazzle_cb {
139 struct usb_device *usbdev; /* init: probe_irda */
140 struct net_device *netdev; /* network layer */
141 struct irlap_cb *irlap; /* The link layer we are binded to */
142
143 struct qos_info qos;
144
145 struct urb *tx_urb;
146 __u8 *tx_buf_clear;
147 unsigned int tx_buf_clear_used;
148 unsigned int tx_buf_clear_sent;
149 __u8 tx_payload[8];
150
151 struct urb *rx_urb;
152 __u8 *rx_buf;
153 iobuff_t rx_unwrap_buff;
154
155 struct usb_ctrlrequest *speed_setuprequest;
156 struct urb *speed_urb;
157 struct ksdazzle_speedparams speedparams;
158 unsigned int new_speed;
159
160 __u8 ep_in;
161 __u8 ep_out;
162
163 spinlock_t lock;
164 int receiving;
165};
166
167/* Callback transmission routine */
168static void ksdazzle_speed_irq(struct urb *urb)
169{
170 /* unlink, shutdown, unplug, other nasties */
171 if (urb->status != 0)
172 dev_err(&urb->dev->dev,
173 "ksdazzle_speed_irq: urb asynchronously failed - %d\n",
174 urb->status);
175}
176
177/* Send a control request to change speed of the dongle */
178static int ksdazzle_change_speed(struct ksdazzle_cb *kingsun, unsigned speed)
179{
180 static unsigned int supported_speeds[] = { 2400, 9600, 19200, 38400,
181 57600, 115200, 576000, 1152000, 4000000, 0
182 };
183 int err;
184 unsigned int i;
185
186 if (kingsun->speed_setuprequest == NULL || kingsun->speed_urb == NULL)
187 return -ENOMEM;
188
189 /* Check that requested speed is among the supported ones */
190 for (i = 0; supported_speeds[i] && supported_speeds[i] != speed; i++) ;
191 if (supported_speeds[i] == 0)
192 return -EOPNOTSUPP;
193
194 memset(&(kingsun->speedparams), 0, sizeof(struct ksdazzle_speedparams));
195 kingsun->speedparams.baudrate = cpu_to_le32(speed);
196 kingsun->speedparams.flags = KS_DATA_8_BITS;
197
198 /* speed_setuprequest pre-filled in ksdazzle_probe */
199 usb_fill_control_urb(kingsun->speed_urb, kingsun->usbdev,
200 usb_sndctrlpipe(kingsun->usbdev, 0),
201 (unsigned char *)kingsun->speed_setuprequest,
202 &(kingsun->speedparams),
203 sizeof(struct ksdazzle_speedparams),
204 ksdazzle_speed_irq, kingsun);
205 kingsun->speed_urb->status = 0;
206 err = usb_submit_urb(kingsun->speed_urb, GFP_ATOMIC);
207
208 return err;
209}
210
211/* Submit one fragment of an IrDA frame to the dongle */
212static void ksdazzle_send_irq(struct urb *urb);
213static int ksdazzle_submit_tx_fragment(struct ksdazzle_cb *kingsun)
214{
215 unsigned int wraplen;
216 int ret;
217
218 /* We can send at most 7 bytes of payload at a time */
219 wraplen = 7;
220 if (wraplen > kingsun->tx_buf_clear_used)
221 wraplen = kingsun->tx_buf_clear_used;
222
223 /* Prepare payload prefix with used length */
224 memset(kingsun->tx_payload, 0, 8);
225 kingsun->tx_payload[0] = (unsigned char)0xf8 + wraplen;
226 memcpy(kingsun->tx_payload + 1, kingsun->tx_buf_clear, wraplen);
227
228 usb_fill_int_urb(kingsun->tx_urb, kingsun->usbdev,
229 usb_sndintpipe(kingsun->usbdev, kingsun->ep_out),
230 kingsun->tx_payload, 8, ksdazzle_send_irq, kingsun, 1);
231 kingsun->tx_urb->status = 0;
232 ret = usb_submit_urb(kingsun->tx_urb, GFP_ATOMIC);
233
234 /* Remember how much data was sent, in order to update at callback */
235 kingsun->tx_buf_clear_sent = (ret == 0) ? wraplen : 0;
236 return ret;
237}
238
239/* Callback transmission routine */
240static void ksdazzle_send_irq(struct urb *urb)
241{
242 struct ksdazzle_cb *kingsun = urb->context;
243 struct net_device *netdev = kingsun->netdev;
244 int ret = 0;
245
246 /* in process of stopping, just drop data */
247 if (!netif_running(kingsun->netdev)) {
248 dev_err(&kingsun->usbdev->dev,
249 "ksdazzle_send_irq: Network not running!\n");
250 return;
251 }
252
253 /* unlink, shutdown, unplug, other nasties */
254 if (urb->status != 0) {
255 dev_err(&kingsun->usbdev->dev,
256 "ksdazzle_send_irq: urb asynchronously failed - %d\n",
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 dev_err(&kingsun->usbdev->dev,
277 "ksdazzle_send_irq: failed tx_urb submit: %d\n",
278 ret);
279 switch (ret) {
280 case -ENODEV:
281 case -EPIPE:
282 break;
283 default:
284 netdev->stats.tx_errors++;
285 netif_start_queue(netdev);
286 }
287 }
288 } else {
289 /* All data sent, send next speed && wake network queue */
290 if (kingsun->new_speed != -1 &&
291 cpu_to_le32(kingsun->new_speed) !=
292 kingsun->speedparams.baudrate)
293 ksdazzle_change_speed(kingsun,
294 kingsun->new_speed);
295
296 netif_wake_queue(netdev);
297 }
298 }
299}
300
301/*
302 * Called from net/core when new frame is available.
303 */
304static netdev_tx_t ksdazzle_hard_xmit(struct sk_buff *skb,
305 struct net_device *netdev)
306{
307 struct ksdazzle_cb *kingsun;
308 unsigned int wraplen;
309 int ret = 0;
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 dev_err(&kingsun->usbdev->dev,
328 "ksdazzle_hard_xmit: failed tx_urb submit: %d\n", ret);
329 switch (ret) {
330 case -ENODEV:
331 case -EPIPE:
332 break;
333 default:
334 netdev->stats.tx_errors++;
335 netif_start_queue(netdev);
336 }
337 } else {
338 netdev->stats.tx_packets++;
339 netdev->stats.tx_bytes += skb->len;
340
341 }
342
343 dev_kfree_skb(skb);
344 spin_unlock(&kingsun->lock);
345
346 return NETDEV_TX_OK;
347}
348
349/* Receive callback function */
350static void ksdazzle_rcv_irq(struct urb *urb)
351{
352 struct ksdazzle_cb *kingsun = urb->context;
353 struct net_device *netdev = kingsun->netdev;
354
355 /* in process of stopping, just drop data */
356 if (!netif_running(netdev)) {
357 kingsun->receiving = 0;
358 return;
359 }
360
361 /* unlink, shutdown, unplug, other nasties */
362 if (urb->status != 0) {
363 dev_err(&kingsun->usbdev->dev,
364 "ksdazzle_rcv_irq: urb asynchronously failed - %d\n",
365 urb->status);
366 kingsun->receiving = 0;
367 return;
368 }
369
370 if (urb->actual_length > 0) {
371 __u8 *bytes = urb->transfer_buffer;
372 unsigned int i;
373
374 for (i = 0; i < urb->actual_length; i++) {
375 async_unwrap_char(netdev, &netdev->stats,
376 &kingsun->rx_unwrap_buff, bytes[i]);
377 }
378 kingsun->receiving =
379 (kingsun->rx_unwrap_buff.state != OUTSIDE_FRAME) ? 1 : 0;
380 }
381
382 /* This urb has already been filled in ksdazzle_net_open. It is assumed that
383 urb keeps the pointer to the payload buffer.
384 */
385 urb->status = 0;
386 usb_submit_urb(urb, GFP_ATOMIC);
387}
388
389/*
390 * Function ksdazzle_net_open (dev)
391 *
392 * Network device is taken up. Usually this is done by "ifconfig irda0 up"
393 */
394static int ksdazzle_net_open(struct net_device *netdev)
395{
396 struct ksdazzle_cb *kingsun = netdev_priv(netdev);
397 int err = -ENOMEM;
398 char hwname[16];
399
400 /* At this point, urbs are NULL, and skb is NULL (see ksdazzle_probe) */
401 kingsun->receiving = 0;
402
403 /* Initialize for SIR to copy data directly into skb. */
404 kingsun->rx_unwrap_buff.in_frame = FALSE;
405 kingsun->rx_unwrap_buff.state = OUTSIDE_FRAME;
406 kingsun->rx_unwrap_buff.truesize = IRDA_SKB_MAX_MTU;
407 kingsun->rx_unwrap_buff.skb = dev_alloc_skb(IRDA_SKB_MAX_MTU);
408 if (!kingsun->rx_unwrap_buff.skb)
409 goto free_mem;
410
411 skb_reserve(kingsun->rx_unwrap_buff.skb, 1);
412 kingsun->rx_unwrap_buff.head = kingsun->rx_unwrap_buff.skb->data;
413
414 kingsun->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
415 if (!kingsun->rx_urb)
416 goto free_mem;
417
418 kingsun->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
419 if (!kingsun->tx_urb)
420 goto free_mem;
421
422 kingsun->speed_urb = usb_alloc_urb(0, GFP_KERNEL);
423 if (!kingsun->speed_urb)
424 goto free_mem;
425
426 /* Initialize speed for dongle */
427 kingsun->new_speed = 9600;
428 err = ksdazzle_change_speed(kingsun, 9600);
429 if (err < 0)
430 goto free_mem;
431
432 /*
433 * Now that everything should be initialized properly,
434 * Open new IrLAP layer instance to take care of us...
435 */
436 sprintf(hwname, "usb#%d", kingsun->usbdev->devnum);
437 kingsun->irlap = irlap_open(netdev, &kingsun->qos, hwname);
438 if (!kingsun->irlap) {
439 dev_err(&kingsun->usbdev->dev, "irlap_open failed\n");
440 goto free_mem;
441 }
442
443 /* Start reception. */
444 usb_fill_int_urb(kingsun->rx_urb, kingsun->usbdev,
445 usb_rcvintpipe(kingsun->usbdev, kingsun->ep_in),
446 kingsun->rx_buf, KINGSUN_RCV_MAX, ksdazzle_rcv_irq,
447 kingsun, 1);
448 kingsun->rx_urb->status = 0;
449 err = usb_submit_urb(kingsun->rx_urb, GFP_KERNEL);
450 if (err) {
451 dev_err(&kingsun->usbdev->dev, "first urb-submit failed: %d\n", err);
452 goto close_irlap;
453 }
454
455 netif_start_queue(netdev);
456
457 /* Situation at this point:
458 - all work buffers allocated
459 - urbs allocated and ready to fill
460 - max rx packet known (in max_rx)
461 - unwrap state machine initialized, in state outside of any frame
462 - receive request in progress
463 - IrLAP layer started, about to hand over packets to send
464 */
465
466 return 0;
467
468 close_irlap:
469 irlap_close(kingsun->irlap);
470 free_mem:
471 usb_free_urb(kingsun->speed_urb);
472 kingsun->speed_urb = NULL;
473 usb_free_urb(kingsun->tx_urb);
474 kingsun->tx_urb = NULL;
475 usb_free_urb(kingsun->rx_urb);
476 kingsun->rx_urb = NULL;
477 if (kingsun->rx_unwrap_buff.skb) {
478 kfree_skb(kingsun->rx_unwrap_buff.skb);
479 kingsun->rx_unwrap_buff.skb = NULL;
480 kingsun->rx_unwrap_buff.head = NULL;
481 }
482 return err;
483}
484
485/*
486 * Function ksdazzle_net_close (dev)
487 *
488 * Network device is taken down. Usually this is done by
489 * "ifconfig irda0 down"
490 */
491static int ksdazzle_net_close(struct net_device *netdev)
492{
493 struct ksdazzle_cb *kingsun = netdev_priv(netdev);
494
495 /* Stop transmit processing */
496 netif_stop_queue(netdev);
497
498 /* Mop up receive && transmit urb's */
499 usb_kill_urb(kingsun->tx_urb);
500 usb_free_urb(kingsun->tx_urb);
501 kingsun->tx_urb = NULL;
502
503 usb_kill_urb(kingsun->speed_urb);
504 usb_free_urb(kingsun->speed_urb);
505 kingsun->speed_urb = NULL;
506
507 usb_kill_urb(kingsun->rx_urb);
508 usb_free_urb(kingsun->rx_urb);
509 kingsun->rx_urb = NULL;
510
511 kfree_skb(kingsun->rx_unwrap_buff.skb);
512 kingsun->rx_unwrap_buff.skb = NULL;
513 kingsun->rx_unwrap_buff.head = NULL;
514 kingsun->rx_unwrap_buff.in_frame = FALSE;
515 kingsun->rx_unwrap_buff.state = OUTSIDE_FRAME;
516 kingsun->receiving = 0;
517
518 /* Stop and remove instance of IrLAP */
519 irlap_close(kingsun->irlap);
520
521 kingsun->irlap = NULL;
522
523 return 0;
524}
525
526/*
527 * IOCTLs : Extra out-of-band network commands...
528 */
529static int ksdazzle_net_ioctl(struct net_device *netdev, struct ifreq *rq,
530 int cmd)
531{
532 struct if_irda_req *irq = (struct if_irda_req *)rq;
533 struct ksdazzle_cb *kingsun = netdev_priv(netdev);
534 int ret = 0;
535
536 switch (cmd) {
537 case SIOCSBANDWIDTH: /* Set bandwidth */
538 if (!capable(CAP_NET_ADMIN))
539 return -EPERM;
540
541 /* Check if the device is still there */
542 if (netif_device_present(kingsun->netdev))
543 return ksdazzle_change_speed(kingsun,
544 irq->ifr_baudrate);
545 break;
546
547 case SIOCSMEDIABUSY: /* Set media busy */
548 if (!capable(CAP_NET_ADMIN))
549 return -EPERM;
550
551 /* Check if the IrDA stack is still there */
552 if (netif_running(kingsun->netdev))
553 irda_device_set_media_busy(kingsun->netdev, TRUE);
554 break;
555
556 case SIOCGRECEIVING:
557 /* Only approximately true */
558 irq->ifr_receiving = kingsun->receiving;
559 break;
560
561 default:
562 ret = -EOPNOTSUPP;
563 }
564
565 return ret;
566}
567
568static const struct net_device_ops ksdazzle_ops = {
569 .ndo_start_xmit = ksdazzle_hard_xmit,
570 .ndo_open = ksdazzle_net_open,
571 .ndo_stop = ksdazzle_net_close,
572 .ndo_do_ioctl = ksdazzle_net_ioctl,
573};
574
575/*
576 * This routine is called by the USB subsystem for each new device
577 * in the system. We need to check if the device is ours, and in
578 * this case start handling it.
579 */
580static int ksdazzle_probe(struct usb_interface *intf,
581 const struct usb_device_id *id)
582{
583 struct usb_host_interface *interface;
584 struct usb_endpoint_descriptor *endpoint;
585
586 struct usb_device *dev = interface_to_usbdev(intf);
587 struct ksdazzle_cb *kingsun = NULL;
588 struct net_device *net = NULL;
589 int ret = -ENOMEM;
590 int pipe, maxp_in, maxp_out;
591 __u8 ep_in;
592 __u8 ep_out;
593
594 /* Check that there really are two interrupt endpoints. Check based on the
595 one in drivers/usb/input/usbmouse.c
596 */
597 interface = intf->cur_altsetting;
598 if (interface->desc.bNumEndpoints != 2) {
599 dev_err(&intf->dev, "ksdazzle: expected 2 endpoints, found %d\n",
600 interface->desc.bNumEndpoints);
601 return -ENODEV;
602 }
603 endpoint = &interface->endpoint[KINGSUN_EP_IN].desc;
604 if (!usb_endpoint_is_int_in(endpoint)) {
605 dev_err(&intf->dev,
606 "ksdazzle: endpoint 0 is not interrupt IN\n");
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 dev_err(&intf->dev,
615 "ksdazzle: endpoint 0 has max packet size %d not in range [2..255]\n",
616 maxp_in);
617 return -ENODEV;
618 }
619
620 endpoint = &interface->endpoint[KINGSUN_EP_OUT].desc;
621 if (!usb_endpoint_is_int_out(endpoint)) {
622 dev_err(&intf->dev,
623 "ksdazzle: endpoint 1 is not interrupt OUT\n");
624 return -ENODEV;
625 }
626
627 ep_out = endpoint->bEndpointAddress;
628 pipe = usb_sndintpipe(dev, ep_out);
629 maxp_out = usb_maxpacket(dev, pipe, usb_pipeout(pipe));
630
631 /* Allocate network device container. */
632 net = alloc_irdadev(sizeof(*kingsun));
633 if (!net)
634 goto err_out1;
635
636 SET_NETDEV_DEV(net, &intf->dev);
637 kingsun = netdev_priv(net);
638 kingsun->netdev = net;
639 kingsun->usbdev = dev;
640 kingsun->ep_in = ep_in;
641 kingsun->ep_out = ep_out;
642 kingsun->irlap = NULL;
643 kingsun->tx_urb = NULL;
644 kingsun->tx_buf_clear = NULL;
645 kingsun->tx_buf_clear_used = 0;
646 kingsun->tx_buf_clear_sent = 0;
647
648 kingsun->rx_urb = NULL;
649 kingsun->rx_buf = NULL;
650 kingsun->rx_unwrap_buff.in_frame = FALSE;
651 kingsun->rx_unwrap_buff.state = OUTSIDE_FRAME;
652 kingsun->rx_unwrap_buff.skb = NULL;
653 kingsun->receiving = 0;
654 spin_lock_init(&kingsun->lock);
655
656 kingsun->speed_setuprequest = NULL;
657 kingsun->speed_urb = NULL;
658 kingsun->speedparams.baudrate = 0;
659
660 /* Allocate input buffer */
661 kingsun->rx_buf = kmalloc(KINGSUN_RCV_MAX, GFP_KERNEL);
662 if (!kingsun->rx_buf)
663 goto free_mem;
664
665 /* Allocate output buffer */
666 kingsun->tx_buf_clear = kmalloc(KINGSUN_SND_FIFO_SIZE, GFP_KERNEL);
667 if (!kingsun->tx_buf_clear)
668 goto free_mem;
669
670 /* Allocate and initialize speed setup packet */
671 kingsun->speed_setuprequest =
672 kmalloc(sizeof(struct usb_ctrlrequest), GFP_KERNEL);
673 if (!kingsun->speed_setuprequest)
674 goto free_mem;
675 kingsun->speed_setuprequest->bRequestType =
676 USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE;
677 kingsun->speed_setuprequest->bRequest = KINGSUN_REQ_SEND;
678 kingsun->speed_setuprequest->wValue = cpu_to_le16(0x0200);
679 kingsun->speed_setuprequest->wIndex = cpu_to_le16(0x0001);
680 kingsun->speed_setuprequest->wLength =
681 cpu_to_le16(sizeof(struct ksdazzle_speedparams));
682
683 printk(KERN_INFO "KingSun/Dazzle IRDA/USB found at address %d, "
684 "Vendor: %x, Product: %x\n",
685 dev->devnum, le16_to_cpu(dev->descriptor.idVendor),
686 le16_to_cpu(dev->descriptor.idProduct));
687
688 /* Initialize QoS for this device */
689 irda_init_max_qos_capabilies(&kingsun->qos);
690
691 /* Baud rates known to be supported. Please uncomment if devices (other
692 than a SonyEriccson K300 phone) can be shown to support higher speeds
693 with this dongle.
694 */
695 kingsun->qos.baud_rate.bits =
696 IR_2400 | IR_9600 | IR_19200 | IR_38400 | IR_57600 | IR_115200;
697 kingsun->qos.min_turn_time.bits &= KINGSUN_MTT;
698 irda_qos_bits_to_value(&kingsun->qos);
699
700 /* Override the network functions we need to use */
701 net->netdev_ops = &ksdazzle_ops;
702
703 ret = register_netdev(net);
704 if (ret != 0)
705 goto free_mem;
706
707 dev_info(&net->dev, "IrDA: Registered KingSun/Dazzle device %s\n",
708 net->name);
709
710 usb_set_intfdata(intf, kingsun);
711
712 /* Situation at this point:
713 - all work buffers allocated
714 - setup requests pre-filled
715 - urbs not allocated, set to NULL
716 - max rx packet known (is KINGSUN_FIFO_SIZE)
717 - unwrap state machine (partially) initialized, but skb == NULL
718 */
719
720 return 0;
721
722 free_mem:
723 kfree(kingsun->speed_setuprequest);
724 kfree(kingsun->tx_buf_clear);
725 kfree(kingsun->rx_buf);
726 free_netdev(net);
727 err_out1:
728 return ret;
729}
730
731/*
732 * The current device is removed, the USB layer tell us to shut it down...
733 */
734static void ksdazzle_disconnect(struct usb_interface *intf)
735{
736 struct ksdazzle_cb *kingsun = usb_get_intfdata(intf);
737
738 if (!kingsun)
739 return;
740
741 unregister_netdev(kingsun->netdev);
742
743 /* Mop up receive && transmit urb's */
744 usb_kill_urb(kingsun->speed_urb);
745 usb_free_urb(kingsun->speed_urb);
746 kingsun->speed_urb = NULL;
747
748 usb_kill_urb(kingsun->tx_urb);
749 usb_free_urb(kingsun->tx_urb);
750 kingsun->tx_urb = NULL;
751
752 usb_kill_urb(kingsun->rx_urb);
753 usb_free_urb(kingsun->rx_urb);
754 kingsun->rx_urb = NULL;
755
756 kfree(kingsun->speed_setuprequest);
757 kfree(kingsun->tx_buf_clear);
758 kfree(kingsun->rx_buf);
759 free_netdev(kingsun->netdev);
760
761 usb_set_intfdata(intf, NULL);
762}
763
764#ifdef CONFIG_PM
765/* USB suspend, so power off the transmitter/receiver */
766static int ksdazzle_suspend(struct usb_interface *intf, pm_message_t message)
767{
768 struct ksdazzle_cb *kingsun = usb_get_intfdata(intf);
769
770 netif_device_detach(kingsun->netdev);
771 if (kingsun->speed_urb != NULL)
772 usb_kill_urb(kingsun->speed_urb);
773 if (kingsun->tx_urb != NULL)
774 usb_kill_urb(kingsun->tx_urb);
775 if (kingsun->rx_urb != NULL)
776 usb_kill_urb(kingsun->rx_urb);
777 return 0;
778}
779
780/* Coming out of suspend, so reset hardware */
781static int ksdazzle_resume(struct usb_interface *intf)
782{
783 struct ksdazzle_cb *kingsun = usb_get_intfdata(intf);
784
785 if (kingsun->rx_urb != NULL) {
786 /* Setup request already filled in ksdazzle_probe */
787 usb_submit_urb(kingsun->rx_urb, GFP_KERNEL);
788 }
789 netif_device_attach(kingsun->netdev);
790
791 return 0;
792}
793#endif
794
795/*
796 * USB device callbacks
797 */
798static struct usb_driver irda_driver = {
799 .name = "ksdazzle-sir",
800 .probe = ksdazzle_probe,
801 .disconnect = ksdazzle_disconnect,
802 .id_table = dongles,
803#ifdef CONFIG_PM
804 .suspend = ksdazzle_suspend,
805 .resume = ksdazzle_resume,
806#endif
807};
808
809module_usb_driver(irda_driver);
810
811MODULE_AUTHOR("Alex Villacís Lasso <a_villacis@palosanto.com>");
812MODULE_DESCRIPTION("IrDA-USB Dongle Driver for KingSun Dazzle");
813MODULE_LICENSE("GPL");