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 */
101 static struct usb_device_id dongles[] = {
102 /* KingSun Co,Ltd IrDA/USB Bridge */
103 {USB_DEVICE(KSDAZZLE_VENDOR_ID, KSDAZZLE_PRODUCT_ID)},
104 {}
105 };
106
107 MODULE_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
116 struct 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
138 struct 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 */
ksdazzle_speed_irq(struct urb * urb)168 static void ksdazzle_speed_irq(struct urb *urb)
169 {
170 /* unlink, shutdown, unplug, other nasties */
171 if (urb->status != 0) {
172 err("ksdazzle_speed_irq: urb asynchronously failed - %d",
173 urb->status);
174 }
175 }
176
177 /* Send a control request to change speed of the dongle */
ksdazzle_change_speed(struct ksdazzle_cb * kingsun,unsigned speed)178 static 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 */
212 static void ksdazzle_send_irq(struct urb *urb);
ksdazzle_submit_tx_fragment(struct ksdazzle_cb * kingsun)213 static 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 */
ksdazzle_send_irq(struct urb * urb)240 static 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 err("ksdazzle_send_irq: Network not running!");
249 return;
250 }
251
252 /* unlink, shutdown, unplug, other nasties */
253 if (urb->status != 0) {
254 err("ksdazzle_send_irq: urb asynchronously failed - %d",
255 urb->status);
256 return;
257 }
258
259 if (kingsun->tx_buf_clear_used > 0) {
260 /* Update data remaining to be sent */
261 if (kingsun->tx_buf_clear_sent < kingsun->tx_buf_clear_used) {
262 memmove(kingsun->tx_buf_clear,
263 kingsun->tx_buf_clear +
264 kingsun->tx_buf_clear_sent,
265 kingsun->tx_buf_clear_used -
266 kingsun->tx_buf_clear_sent);
267 }
268 kingsun->tx_buf_clear_used -= kingsun->tx_buf_clear_sent;
269 kingsun->tx_buf_clear_sent = 0;
270
271 if (kingsun->tx_buf_clear_used > 0) {
272 /* There is more data to be sent */
273 if ((ret = ksdazzle_submit_tx_fragment(kingsun)) != 0) {
274 err("ksdazzle_send_irq: failed tx_urb submit: %d", ret);
275 switch (ret) {
276 case -ENODEV:
277 case -EPIPE:
278 break;
279 default:
280 netdev->stats.tx_errors++;
281 netif_start_queue(netdev);
282 }
283 }
284 } else {
285 /* All data sent, send next speed && wake network queue */
286 if (kingsun->new_speed != -1 &&
287 cpu_to_le32(kingsun->new_speed) !=
288 kingsun->speedparams.baudrate)
289 ksdazzle_change_speed(kingsun,
290 kingsun->new_speed);
291
292 netif_wake_queue(netdev);
293 }
294 }
295 }
296
297 /*
298 * Called from net/core when new frame is available.
299 */
ksdazzle_hard_xmit(struct sk_buff * skb,struct net_device * netdev)300 static netdev_tx_t ksdazzle_hard_xmit(struct sk_buff *skb,
301 struct net_device *netdev)
302 {
303 struct ksdazzle_cb *kingsun;
304 unsigned int wraplen;
305 int ret = 0;
306
307 netif_stop_queue(netdev);
308
309 /* the IRDA wrapping routines don't deal with non linear skb */
310 SKB_LINEAR_ASSERT(skb);
311
312 kingsun = netdev_priv(netdev);
313
314 spin_lock(&kingsun->lock);
315 kingsun->new_speed = irda_get_next_speed(skb);
316
317 /* Append data to the end of whatever data remains to be transmitted */
318 wraplen =
319 async_wrap_skb(skb, kingsun->tx_buf_clear, KINGSUN_SND_FIFO_SIZE);
320 kingsun->tx_buf_clear_used = wraplen;
321
322 if ((ret = ksdazzle_submit_tx_fragment(kingsun)) != 0) {
323 err("ksdazzle_hard_xmit: failed tx_urb submit: %d", ret);
324 switch (ret) {
325 case -ENODEV:
326 case -EPIPE:
327 break;
328 default:
329 netdev->stats.tx_errors++;
330 netif_start_queue(netdev);
331 }
332 } else {
333 netdev->stats.tx_packets++;
334 netdev->stats.tx_bytes += skb->len;
335
336 }
337
338 dev_kfree_skb(skb);
339 spin_unlock(&kingsun->lock);
340
341 return NETDEV_TX_OK;
342 }
343
344 /* Receive callback function */
ksdazzle_rcv_irq(struct urb * urb)345 static void ksdazzle_rcv_irq(struct urb *urb)
346 {
347 struct ksdazzle_cb *kingsun = urb->context;
348 struct net_device *netdev = kingsun->netdev;
349
350 /* in process of stopping, just drop data */
351 if (!netif_running(netdev)) {
352 kingsun->receiving = 0;
353 return;
354 }
355
356 /* unlink, shutdown, unplug, other nasties */
357 if (urb->status != 0) {
358 err("ksdazzle_rcv_irq: urb asynchronously failed - %d",
359 urb->status);
360 kingsun->receiving = 0;
361 return;
362 }
363
364 if (urb->actual_length > 0) {
365 __u8 *bytes = urb->transfer_buffer;
366 unsigned int i;
367
368 for (i = 0; i < urb->actual_length; i++) {
369 async_unwrap_char(netdev, &netdev->stats,
370 &kingsun->rx_unwrap_buff, bytes[i]);
371 }
372 kingsun->receiving =
373 (kingsun->rx_unwrap_buff.state != OUTSIDE_FRAME) ? 1 : 0;
374 }
375
376 /* This urb has already been filled in ksdazzle_net_open. It is assumed that
377 urb keeps the pointer to the payload buffer.
378 */
379 urb->status = 0;
380 usb_submit_urb(urb, GFP_ATOMIC);
381 }
382
383 /*
384 * Function ksdazzle_net_open (dev)
385 *
386 * Network device is taken up. Usually this is done by "ifconfig irda0 up"
387 */
ksdazzle_net_open(struct net_device * netdev)388 static int ksdazzle_net_open(struct net_device *netdev)
389 {
390 struct ksdazzle_cb *kingsun = netdev_priv(netdev);
391 int err = -ENOMEM;
392 char hwname[16];
393
394 /* At this point, urbs are NULL, and skb is NULL (see ksdazzle_probe) */
395 kingsun->receiving = 0;
396
397 /* Initialize for SIR to copy data directly into skb. */
398 kingsun->rx_unwrap_buff.in_frame = FALSE;
399 kingsun->rx_unwrap_buff.state = OUTSIDE_FRAME;
400 kingsun->rx_unwrap_buff.truesize = IRDA_SKB_MAX_MTU;
401 kingsun->rx_unwrap_buff.skb = dev_alloc_skb(IRDA_SKB_MAX_MTU);
402 if (!kingsun->rx_unwrap_buff.skb)
403 goto free_mem;
404
405 skb_reserve(kingsun->rx_unwrap_buff.skb, 1);
406 kingsun->rx_unwrap_buff.head = kingsun->rx_unwrap_buff.skb->data;
407
408 kingsun->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
409 if (!kingsun->rx_urb)
410 goto free_mem;
411
412 kingsun->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
413 if (!kingsun->tx_urb)
414 goto free_mem;
415
416 kingsun->speed_urb = usb_alloc_urb(0, GFP_KERNEL);
417 if (!kingsun->speed_urb)
418 goto free_mem;
419
420 /* Initialize speed for dongle */
421 kingsun->new_speed = 9600;
422 err = ksdazzle_change_speed(kingsun, 9600);
423 if (err < 0)
424 goto free_mem;
425
426 /*
427 * Now that everything should be initialized properly,
428 * Open new IrLAP layer instance to take care of us...
429 */
430 sprintf(hwname, "usb#%d", kingsun->usbdev->devnum);
431 kingsun->irlap = irlap_open(netdev, &kingsun->qos, hwname);
432 if (!kingsun->irlap) {
433 err("ksdazzle-sir: irlap_open failed");
434 goto free_mem;
435 }
436
437 /* Start reception. */
438 usb_fill_int_urb(kingsun->rx_urb, kingsun->usbdev,
439 usb_rcvintpipe(kingsun->usbdev, kingsun->ep_in),
440 kingsun->rx_buf, KINGSUN_RCV_MAX, ksdazzle_rcv_irq,
441 kingsun, 1);
442 kingsun->rx_urb->status = 0;
443 err = usb_submit_urb(kingsun->rx_urb, GFP_KERNEL);
444 if (err) {
445 err("ksdazzle-sir: first urb-submit failed: %d", err);
446 goto close_irlap;
447 }
448
449 netif_start_queue(netdev);
450
451 /* Situation at this point:
452 - all work buffers allocated
453 - urbs allocated and ready to fill
454 - max rx packet known (in max_rx)
455 - unwrap state machine initialized, in state outside of any frame
456 - receive request in progress
457 - IrLAP layer started, about to hand over packets to send
458 */
459
460 return 0;
461
462 close_irlap:
463 irlap_close(kingsun->irlap);
464 free_mem:
465 usb_free_urb(kingsun->speed_urb);
466 kingsun->speed_urb = NULL;
467 usb_free_urb(kingsun->tx_urb);
468 kingsun->tx_urb = NULL;
469 usb_free_urb(kingsun->rx_urb);
470 kingsun->rx_urb = NULL;
471 if (kingsun->rx_unwrap_buff.skb) {
472 kfree_skb(kingsun->rx_unwrap_buff.skb);
473 kingsun->rx_unwrap_buff.skb = NULL;
474 kingsun->rx_unwrap_buff.head = NULL;
475 }
476 return err;
477 }
478
479 /*
480 * Function ksdazzle_net_close (dev)
481 *
482 * Network device is taken down. Usually this is done by
483 * "ifconfig irda0 down"
484 */
ksdazzle_net_close(struct net_device * netdev)485 static int ksdazzle_net_close(struct net_device *netdev)
486 {
487 struct ksdazzle_cb *kingsun = netdev_priv(netdev);
488
489 /* Stop transmit processing */
490 netif_stop_queue(netdev);
491
492 /* Mop up receive && transmit urb's */
493 usb_kill_urb(kingsun->tx_urb);
494 usb_free_urb(kingsun->tx_urb);
495 kingsun->tx_urb = NULL;
496
497 usb_kill_urb(kingsun->speed_urb);
498 usb_free_urb(kingsun->speed_urb);
499 kingsun->speed_urb = NULL;
500
501 usb_kill_urb(kingsun->rx_urb);
502 usb_free_urb(kingsun->rx_urb);
503 kingsun->rx_urb = NULL;
504
505 kfree_skb(kingsun->rx_unwrap_buff.skb);
506 kingsun->rx_unwrap_buff.skb = NULL;
507 kingsun->rx_unwrap_buff.head = NULL;
508 kingsun->rx_unwrap_buff.in_frame = FALSE;
509 kingsun->rx_unwrap_buff.state = OUTSIDE_FRAME;
510 kingsun->receiving = 0;
511
512 /* Stop and remove instance of IrLAP */
513 irlap_close(kingsun->irlap);
514
515 kingsun->irlap = NULL;
516
517 return 0;
518 }
519
520 /*
521 * IOCTLs : Extra out-of-band network commands...
522 */
ksdazzle_net_ioctl(struct net_device * netdev,struct ifreq * rq,int cmd)523 static int ksdazzle_net_ioctl(struct net_device *netdev, struct ifreq *rq,
524 int cmd)
525 {
526 struct if_irda_req *irq = (struct if_irda_req *)rq;
527 struct ksdazzle_cb *kingsun = netdev_priv(netdev);
528 int ret = 0;
529
530 switch (cmd) {
531 case SIOCSBANDWIDTH: /* Set bandwidth */
532 if (!capable(CAP_NET_ADMIN))
533 return -EPERM;
534
535 /* Check if the device is still there */
536 if (netif_device_present(kingsun->netdev))
537 return ksdazzle_change_speed(kingsun,
538 irq->ifr_baudrate);
539 break;
540
541 case SIOCSMEDIABUSY: /* Set media busy */
542 if (!capable(CAP_NET_ADMIN))
543 return -EPERM;
544
545 /* Check if the IrDA stack is still there */
546 if (netif_running(kingsun->netdev))
547 irda_device_set_media_busy(kingsun->netdev, TRUE);
548 break;
549
550 case SIOCGRECEIVING:
551 /* Only approximately true */
552 irq->ifr_receiving = kingsun->receiving;
553 break;
554
555 default:
556 ret = -EOPNOTSUPP;
557 }
558
559 return ret;
560 }
561
562 static const struct net_device_ops ksdazzle_ops = {
563 .ndo_start_xmit = ksdazzle_hard_xmit,
564 .ndo_open = ksdazzle_net_open,
565 .ndo_stop = ksdazzle_net_close,
566 .ndo_do_ioctl = ksdazzle_net_ioctl,
567 };
568
569 /*
570 * This routine is called by the USB subsystem for each new device
571 * in the system. We need to check if the device is ours, and in
572 * this case start handling it.
573 */
ksdazzle_probe(struct usb_interface * intf,const struct usb_device_id * id)574 static int ksdazzle_probe(struct usb_interface *intf,
575 const struct usb_device_id *id)
576 {
577 struct usb_host_interface *interface;
578 struct usb_endpoint_descriptor *endpoint;
579
580 struct usb_device *dev = interface_to_usbdev(intf);
581 struct ksdazzle_cb *kingsun = NULL;
582 struct net_device *net = NULL;
583 int ret = -ENOMEM;
584 int pipe, maxp_in, maxp_out;
585 __u8 ep_in;
586 __u8 ep_out;
587
588 /* Check that there really are two interrupt endpoints. Check based on the
589 one in drivers/usb/input/usbmouse.c
590 */
591 interface = intf->cur_altsetting;
592 if (interface->desc.bNumEndpoints != 2) {
593 err("ksdazzle: expected 2 endpoints, found %d",
594 interface->desc.bNumEndpoints);
595 return -ENODEV;
596 }
597 endpoint = &interface->endpoint[KINGSUN_EP_IN].desc;
598 if (!usb_endpoint_is_int_in(endpoint)) {
599 err("ksdazzle: endpoint 0 is not interrupt IN");
600 return -ENODEV;
601 }
602
603 ep_in = endpoint->bEndpointAddress;
604 pipe = usb_rcvintpipe(dev, ep_in);
605 maxp_in = usb_maxpacket(dev, pipe, usb_pipeout(pipe));
606 if (maxp_in > 255 || maxp_in <= 1) {
607 err("ksdazzle: endpoint 0 has max packet size %d not in range [2..255]", maxp_in);
608 return -ENODEV;
609 }
610
611 endpoint = &interface->endpoint[KINGSUN_EP_OUT].desc;
612 if (!usb_endpoint_is_int_out(endpoint)) {
613 err("ksdazzle: endpoint 1 is not interrupt OUT");
614 return -ENODEV;
615 }
616
617 ep_out = endpoint->bEndpointAddress;
618 pipe = usb_sndintpipe(dev, ep_out);
619 maxp_out = usb_maxpacket(dev, pipe, usb_pipeout(pipe));
620
621 /* Allocate network device container. */
622 net = alloc_irdadev(sizeof(*kingsun));
623 if (!net)
624 goto err_out1;
625
626 SET_NETDEV_DEV(net, &intf->dev);
627 kingsun = netdev_priv(net);
628 kingsun->netdev = net;
629 kingsun->usbdev = dev;
630 kingsun->ep_in = ep_in;
631 kingsun->ep_out = ep_out;
632 kingsun->irlap = NULL;
633 kingsun->tx_urb = NULL;
634 kingsun->tx_buf_clear = NULL;
635 kingsun->tx_buf_clear_used = 0;
636 kingsun->tx_buf_clear_sent = 0;
637
638 kingsun->rx_urb = NULL;
639 kingsun->rx_buf = NULL;
640 kingsun->rx_unwrap_buff.in_frame = FALSE;
641 kingsun->rx_unwrap_buff.state = OUTSIDE_FRAME;
642 kingsun->rx_unwrap_buff.skb = NULL;
643 kingsun->receiving = 0;
644 spin_lock_init(&kingsun->lock);
645
646 kingsun->speed_setuprequest = NULL;
647 kingsun->speed_urb = NULL;
648 kingsun->speedparams.baudrate = 0;
649
650 /* Allocate input buffer */
651 kingsun->rx_buf = kmalloc(KINGSUN_RCV_MAX, GFP_KERNEL);
652 if (!kingsun->rx_buf)
653 goto free_mem;
654
655 /* Allocate output buffer */
656 kingsun->tx_buf_clear = kmalloc(KINGSUN_SND_FIFO_SIZE, GFP_KERNEL);
657 if (!kingsun->tx_buf_clear)
658 goto free_mem;
659
660 /* Allocate and initialize speed setup packet */
661 kingsun->speed_setuprequest =
662 kmalloc(sizeof(struct usb_ctrlrequest), GFP_KERNEL);
663 if (!kingsun->speed_setuprequest)
664 goto free_mem;
665 kingsun->speed_setuprequest->bRequestType =
666 USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE;
667 kingsun->speed_setuprequest->bRequest = KINGSUN_REQ_SEND;
668 kingsun->speed_setuprequest->wValue = cpu_to_le16(0x0200);
669 kingsun->speed_setuprequest->wIndex = cpu_to_le16(0x0001);
670 kingsun->speed_setuprequest->wLength =
671 cpu_to_le16(sizeof(struct ksdazzle_speedparams));
672
673 printk(KERN_INFO "KingSun/Dazzle IRDA/USB found at address %d, "
674 "Vendor: %x, Product: %x\n",
675 dev->devnum, le16_to_cpu(dev->descriptor.idVendor),
676 le16_to_cpu(dev->descriptor.idProduct));
677
678 /* Initialize QoS for this device */
679 irda_init_max_qos_capabilies(&kingsun->qos);
680
681 /* Baud rates known to be supported. Please uncomment if devices (other
682 than a SonyEriccson K300 phone) can be shown to support higher speeds
683 with this dongle.
684 */
685 kingsun->qos.baud_rate.bits =
686 IR_2400 | IR_9600 | IR_19200 | IR_38400 | IR_57600 | IR_115200;
687 kingsun->qos.min_turn_time.bits &= KINGSUN_MTT;
688 irda_qos_bits_to_value(&kingsun->qos);
689
690 /* Override the network functions we need to use */
691 net->netdev_ops = &ksdazzle_ops;
692
693 ret = register_netdev(net);
694 if (ret != 0)
695 goto free_mem;
696
697 dev_info(&net->dev, "IrDA: Registered KingSun/Dazzle device %s\n",
698 net->name);
699
700 usb_set_intfdata(intf, kingsun);
701
702 /* Situation at this point:
703 - all work buffers allocated
704 - setup requests pre-filled
705 - urbs not allocated, set to NULL
706 - max rx packet known (is KINGSUN_FIFO_SIZE)
707 - unwrap state machine (partially) initialized, but skb == NULL
708 */
709
710 return 0;
711
712 free_mem:
713 kfree(kingsun->speed_setuprequest);
714 kfree(kingsun->tx_buf_clear);
715 kfree(kingsun->rx_buf);
716 free_netdev(net);
717 err_out1:
718 return ret;
719 }
720
721 /*
722 * The current device is removed, the USB layer tell us to shut it down...
723 */
ksdazzle_disconnect(struct usb_interface * intf)724 static void ksdazzle_disconnect(struct usb_interface *intf)
725 {
726 struct ksdazzle_cb *kingsun = usb_get_intfdata(intf);
727
728 if (!kingsun)
729 return;
730
731 unregister_netdev(kingsun->netdev);
732
733 /* Mop up receive && transmit urb's */
734 usb_kill_urb(kingsun->speed_urb);
735 usb_free_urb(kingsun->speed_urb);
736 kingsun->speed_urb = NULL;
737
738 usb_kill_urb(kingsun->tx_urb);
739 usb_free_urb(kingsun->tx_urb);
740 kingsun->tx_urb = NULL;
741
742 usb_kill_urb(kingsun->rx_urb);
743 usb_free_urb(kingsun->rx_urb);
744 kingsun->rx_urb = NULL;
745
746 kfree(kingsun->speed_setuprequest);
747 kfree(kingsun->tx_buf_clear);
748 kfree(kingsun->rx_buf);
749 free_netdev(kingsun->netdev);
750
751 usb_set_intfdata(intf, NULL);
752 }
753
754 #ifdef CONFIG_PM
755 /* USB suspend, so power off the transmitter/receiver */
ksdazzle_suspend(struct usb_interface * intf,pm_message_t message)756 static int ksdazzle_suspend(struct usb_interface *intf, pm_message_t message)
757 {
758 struct ksdazzle_cb *kingsun = usb_get_intfdata(intf);
759
760 netif_device_detach(kingsun->netdev);
761 if (kingsun->speed_urb != NULL)
762 usb_kill_urb(kingsun->speed_urb);
763 if (kingsun->tx_urb != NULL)
764 usb_kill_urb(kingsun->tx_urb);
765 if (kingsun->rx_urb != NULL)
766 usb_kill_urb(kingsun->rx_urb);
767 return 0;
768 }
769
770 /* Coming out of suspend, so reset hardware */
ksdazzle_resume(struct usb_interface * intf)771 static int ksdazzle_resume(struct usb_interface *intf)
772 {
773 struct ksdazzle_cb *kingsun = usb_get_intfdata(intf);
774
775 if (kingsun->rx_urb != NULL) {
776 /* Setup request already filled in ksdazzle_probe */
777 usb_submit_urb(kingsun->rx_urb, GFP_KERNEL);
778 }
779 netif_device_attach(kingsun->netdev);
780
781 return 0;
782 }
783 #endif
784
785 /*
786 * USB device callbacks
787 */
788 static struct usb_driver irda_driver = {
789 .name = "ksdazzle-sir",
790 .probe = ksdazzle_probe,
791 .disconnect = ksdazzle_disconnect,
792 .id_table = dongles,
793 #ifdef CONFIG_PM
794 .suspend = ksdazzle_suspend,
795 .resume = ksdazzle_resume,
796 #endif
797 };
798
799 module_usb_driver(irda_driver);
800
801 MODULE_AUTHOR("Alex Villacís Lasso <a_villacis@palosanto.com>");
802 MODULE_DESCRIPTION("IrDA-USB Dongle Driver for KingSun Dazzle");
803 MODULE_LICENSE("GPL");
804