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/slab.h>
84 #include <linux/usb.h>
85 #include <linux/device.h>
86 #include <linux/crc32.h>
87
88 #include <asm/unaligned.h>
89 #include <asm/byteorder.h>
90 #include <asm/uaccess.h>
91
92 #include <net/irda/irda.h>
93 #include <net/irda/wrapper.h>
94 #include <net/irda/crc.h>
95
96 #define KSDAZZLE_VENDOR_ID 0x07d0
97 #define KSDAZZLE_PRODUCT_ID 0x4100
98
99 /* These are the currently known USB ids */
100 static struct usb_device_id dongles[] = {
101 /* KingSun Co,Ltd IrDA/USB Bridge */
102 {USB_DEVICE(KSDAZZLE_VENDOR_ID, KSDAZZLE_PRODUCT_ID)},
103 {}
104 };
105
106 MODULE_DEVICE_TABLE(usb, dongles);
107
108 #define KINGSUN_MTT 0x07
109 #define KINGSUN_REQ_RECV 0x01
110 #define KINGSUN_REQ_SEND 0x09
111
112 #define KINGSUN_SND_FIFO_SIZE 2048 /* Max packet we can send */
113 #define KINGSUN_RCV_MAX 2048 /* Max transfer we can receive */
114
115 struct ksdazzle_speedparams {
116 __le32 baudrate; /* baud rate, little endian */
117 __u8 flags;
118 __u8 reserved[3];
119 } __packed;
120
121 #define KS_DATA_5_BITS 0x00
122 #define KS_DATA_6_BITS 0x01
123 #define KS_DATA_7_BITS 0x02
124 #define KS_DATA_8_BITS 0x03
125
126 #define KS_STOP_BITS_1 0x00
127 #define KS_STOP_BITS_2 0x08
128
129 #define KS_PAR_DISABLE 0x00
130 #define KS_PAR_EVEN 0x10
131 #define KS_PAR_ODD 0x30
132 #define KS_RESET 0x80
133
134 #define KINGSUN_EP_IN 0
135 #define KINGSUN_EP_OUT 1
136
137 struct ksdazzle_cb {
138 struct usb_device *usbdev; /* init: probe_irda */
139 struct net_device *netdev; /* network layer */
140 struct irlap_cb *irlap; /* The link layer we are binded to */
141
142 struct qos_info qos;
143
144 struct urb *tx_urb;
145 __u8 *tx_buf_clear;
146 unsigned int tx_buf_clear_used;
147 unsigned int tx_buf_clear_sent;
148 __u8 tx_payload[8];
149
150 struct urb *rx_urb;
151 __u8 *rx_buf;
152 iobuff_t rx_unwrap_buff;
153
154 struct usb_ctrlrequest *speed_setuprequest;
155 struct urb *speed_urb;
156 struct ksdazzle_speedparams speedparams;
157 unsigned int new_speed;
158
159 __u8 ep_in;
160 __u8 ep_out;
161
162 spinlock_t lock;
163 int receiving;
164 };
165
166 /* Callback transmission routine */
ksdazzle_speed_irq(struct urb * urb)167 static void ksdazzle_speed_irq(struct urb *urb)
168 {
169 /* unlink, shutdown, unplug, other nasties */
170 if (urb->status != 0)
171 dev_err(&urb->dev->dev,
172 "ksdazzle_speed_irq: urb asynchronously failed - %d\n",
173 urb->status);
174 }
175
176 /* Send a control request to change speed of the dongle */
ksdazzle_change_speed(struct ksdazzle_cb * kingsun,unsigned speed)177 static int ksdazzle_change_speed(struct ksdazzle_cb *kingsun, unsigned speed)
178 {
179 static unsigned int supported_speeds[] = { 2400, 9600, 19200, 38400,
180 57600, 115200, 576000, 1152000, 4000000, 0
181 };
182 int err;
183 unsigned int i;
184
185 if (kingsun->speed_setuprequest == NULL || kingsun->speed_urb == NULL)
186 return -ENOMEM;
187
188 /* Check that requested speed is among the supported ones */
189 for (i = 0; supported_speeds[i] && supported_speeds[i] != speed; i++) ;
190 if (supported_speeds[i] == 0)
191 return -EOPNOTSUPP;
192
193 memset(&(kingsun->speedparams), 0, sizeof(struct ksdazzle_speedparams));
194 kingsun->speedparams.baudrate = cpu_to_le32(speed);
195 kingsun->speedparams.flags = KS_DATA_8_BITS;
196
197 /* speed_setuprequest pre-filled in ksdazzle_probe */
198 usb_fill_control_urb(kingsun->speed_urb, kingsun->usbdev,
199 usb_sndctrlpipe(kingsun->usbdev, 0),
200 (unsigned char *)kingsun->speed_setuprequest,
201 &(kingsun->speedparams),
202 sizeof(struct ksdazzle_speedparams),
203 ksdazzle_speed_irq, kingsun);
204 kingsun->speed_urb->status = 0;
205 err = usb_submit_urb(kingsun->speed_urb, GFP_ATOMIC);
206
207 return err;
208 }
209
210 /* Submit one fragment of an IrDA frame to the dongle */
211 static void ksdazzle_send_irq(struct urb *urb);
ksdazzle_submit_tx_fragment(struct ksdazzle_cb * kingsun)212 static int ksdazzle_submit_tx_fragment(struct ksdazzle_cb *kingsun)
213 {
214 unsigned int wraplen;
215 int ret;
216
217 /* We can send at most 7 bytes of payload at a time */
218 wraplen = 7;
219 if (wraplen > kingsun->tx_buf_clear_used)
220 wraplen = kingsun->tx_buf_clear_used;
221
222 /* Prepare payload prefix with used length */
223 memset(kingsun->tx_payload, 0, 8);
224 kingsun->tx_payload[0] = (unsigned char)0xf8 + wraplen;
225 memcpy(kingsun->tx_payload + 1, kingsun->tx_buf_clear, wraplen);
226
227 usb_fill_int_urb(kingsun->tx_urb, kingsun->usbdev,
228 usb_sndintpipe(kingsun->usbdev, kingsun->ep_out),
229 kingsun->tx_payload, 8, ksdazzle_send_irq, kingsun, 1);
230 kingsun->tx_urb->status = 0;
231 ret = usb_submit_urb(kingsun->tx_urb, GFP_ATOMIC);
232
233 /* Remember how much data was sent, in order to update at callback */
234 kingsun->tx_buf_clear_sent = (ret == 0) ? wraplen : 0;
235 return ret;
236 }
237
238 /* Callback transmission routine */
ksdazzle_send_irq(struct urb * urb)239 static void ksdazzle_send_irq(struct urb *urb)
240 {
241 struct ksdazzle_cb *kingsun = urb->context;
242 struct net_device *netdev = kingsun->netdev;
243 int ret = 0;
244
245 /* in process of stopping, just drop data */
246 if (!netif_running(kingsun->netdev)) {
247 dev_err(&kingsun->usbdev->dev,
248 "ksdazzle_send_irq: Network not running!\n");
249 return;
250 }
251
252 /* unlink, shutdown, unplug, other nasties */
253 if (urb->status != 0) {
254 dev_err(&kingsun->usbdev->dev,
255 "ksdazzle_send_irq: urb asynchronously failed - %d\n",
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 dev_err(&kingsun->usbdev->dev,
276 "ksdazzle_send_irq: failed tx_urb submit: %d\n",
277 ret);
278 switch (ret) {
279 case -ENODEV:
280 case -EPIPE:
281 break;
282 default:
283 netdev->stats.tx_errors++;
284 netif_start_queue(netdev);
285 }
286 }
287 } else {
288 /* All data sent, send next speed && wake network queue */
289 if (kingsun->new_speed != -1 &&
290 cpu_to_le32(kingsun->new_speed) !=
291 kingsun->speedparams.baudrate)
292 ksdazzle_change_speed(kingsun,
293 kingsun->new_speed);
294
295 netif_wake_queue(netdev);
296 }
297 }
298 }
299
300 /*
301 * Called from net/core when new frame is available.
302 */
ksdazzle_hard_xmit(struct sk_buff * skb,struct net_device * netdev)303 static netdev_tx_t ksdazzle_hard_xmit(struct sk_buff *skb,
304 struct net_device *netdev)
305 {
306 struct ksdazzle_cb *kingsun;
307 unsigned int wraplen;
308 int ret = 0;
309
310 netif_stop_queue(netdev);
311
312 /* the IRDA wrapping routines don't deal with non linear skb */
313 SKB_LINEAR_ASSERT(skb);
314
315 kingsun = netdev_priv(netdev);
316
317 spin_lock(&kingsun->lock);
318 kingsun->new_speed = irda_get_next_speed(skb);
319
320 /* Append data to the end of whatever data remains to be transmitted */
321 wraplen =
322 async_wrap_skb(skb, kingsun->tx_buf_clear, KINGSUN_SND_FIFO_SIZE);
323 kingsun->tx_buf_clear_used = wraplen;
324
325 if ((ret = ksdazzle_submit_tx_fragment(kingsun)) != 0) {
326 dev_err(&kingsun->usbdev->dev,
327 "ksdazzle_hard_xmit: failed tx_urb submit: %d\n", ret);
328 switch (ret) {
329 case -ENODEV:
330 case -EPIPE:
331 break;
332 default:
333 netdev->stats.tx_errors++;
334 netif_start_queue(netdev);
335 }
336 } else {
337 netdev->stats.tx_packets++;
338 netdev->stats.tx_bytes += skb->len;
339
340 }
341
342 dev_kfree_skb(skb);
343 spin_unlock(&kingsun->lock);
344
345 return NETDEV_TX_OK;
346 }
347
348 /* Receive callback function */
ksdazzle_rcv_irq(struct urb * urb)349 static void ksdazzle_rcv_irq(struct urb *urb)
350 {
351 struct ksdazzle_cb *kingsun = urb->context;
352 struct net_device *netdev = kingsun->netdev;
353
354 /* in process of stopping, just drop data */
355 if (!netif_running(netdev)) {
356 kingsun->receiving = 0;
357 return;
358 }
359
360 /* unlink, shutdown, unplug, other nasties */
361 if (urb->status != 0) {
362 dev_err(&kingsun->usbdev->dev,
363 "ksdazzle_rcv_irq: urb asynchronously failed - %d\n",
364 urb->status);
365 kingsun->receiving = 0;
366 return;
367 }
368
369 if (urb->actual_length > 0) {
370 __u8 *bytes = urb->transfer_buffer;
371 unsigned int i;
372
373 for (i = 0; i < urb->actual_length; i++) {
374 async_unwrap_char(netdev, &netdev->stats,
375 &kingsun->rx_unwrap_buff, bytes[i]);
376 }
377 kingsun->receiving =
378 (kingsun->rx_unwrap_buff.state != OUTSIDE_FRAME) ? 1 : 0;
379 }
380
381 /* This urb has already been filled in ksdazzle_net_open. It is assumed that
382 urb keeps the pointer to the payload buffer.
383 */
384 urb->status = 0;
385 usb_submit_urb(urb, GFP_ATOMIC);
386 }
387
388 /*
389 * Function ksdazzle_net_open (dev)
390 *
391 * Network device is taken up. Usually this is done by "ifconfig irda0 up"
392 */
ksdazzle_net_open(struct net_device * netdev)393 static int ksdazzle_net_open(struct net_device *netdev)
394 {
395 struct ksdazzle_cb *kingsun = netdev_priv(netdev);
396 int err = -ENOMEM;
397 char hwname[16];
398
399 /* At this point, urbs are NULL, and skb is NULL (see ksdazzle_probe) */
400 kingsun->receiving = 0;
401
402 /* Initialize for SIR to copy data directly into skb. */
403 kingsun->rx_unwrap_buff.in_frame = FALSE;
404 kingsun->rx_unwrap_buff.state = OUTSIDE_FRAME;
405 kingsun->rx_unwrap_buff.truesize = IRDA_SKB_MAX_MTU;
406 kingsun->rx_unwrap_buff.skb = dev_alloc_skb(IRDA_SKB_MAX_MTU);
407 if (!kingsun->rx_unwrap_buff.skb)
408 goto free_mem;
409
410 skb_reserve(kingsun->rx_unwrap_buff.skb, 1);
411 kingsun->rx_unwrap_buff.head = kingsun->rx_unwrap_buff.skb->data;
412
413 kingsun->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
414 if (!kingsun->rx_urb)
415 goto free_mem;
416
417 kingsun->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
418 if (!kingsun->tx_urb)
419 goto free_mem;
420
421 kingsun->speed_urb = usb_alloc_urb(0, GFP_KERNEL);
422 if (!kingsun->speed_urb)
423 goto free_mem;
424
425 /* Initialize speed for dongle */
426 kingsun->new_speed = 9600;
427 err = ksdazzle_change_speed(kingsun, 9600);
428 if (err < 0)
429 goto free_mem;
430
431 /*
432 * Now that everything should be initialized properly,
433 * Open new IrLAP layer instance to take care of us...
434 */
435 sprintf(hwname, "usb#%d", kingsun->usbdev->devnum);
436 kingsun->irlap = irlap_open(netdev, &kingsun->qos, hwname);
437 if (!kingsun->irlap) {
438 err = -ENOMEM;
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 */
ksdazzle_net_close(struct net_device * netdev)491 static 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 */
ksdazzle_net_ioctl(struct net_device * netdev,struct ifreq * rq,int cmd)529 static 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
568 static 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 */
ksdazzle_probe(struct usb_interface * intf,const struct usb_device_id * id)580 static 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 */
ksdazzle_disconnect(struct usb_interface * intf)734 static 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 */
ksdazzle_suspend(struct usb_interface * intf,pm_message_t message)766 static 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 */
ksdazzle_resume(struct usb_interface * intf)781 static 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 */
798 static 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
809 module_usb_driver(irda_driver);
810
811 MODULE_AUTHOR("Alex Villacís Lasso <a_villacis@palosanto.com>");
812 MODULE_DESCRIPTION("IrDA-USB Dongle Driver for KingSun Dazzle");
813 MODULE_LICENSE("GPL");
814