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Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux...
[deliverable/linux.git] / drivers / net / irda / ksdazzle-sir.c
CommitLineData
4a1d7c25
AVL		 1/*****************************************************************************
2*
3* Filename: ksdazzle.c
630e4997 4* Version: 0.1.2
4a1d7c25
AVL		 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>
4a1d7c25
AVL		 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 */
102static struct usb_device_id dongles[] = {
103 /* KingSun Co,Ltd IrDA/USB Bridge */
104 {USB_DEVICE(KSDAZZLE_VENDOR_ID, KSDAZZLE_PRODUCT_ID)},
105 {}
106};
107
108MODULE_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 */
630e4997 115#define KINGSUN_RCV_MAX 2048 /* Max transfer we can receive */
4a1d7c25
AVL		 116
117struct 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
139struct 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 struct net_device_stats stats; /* network statistics */
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;
630e4997 153 __u8 *rx_buf;
4a1d7c25
AVL		 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 */
169static 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 */
179static 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 */
213static void ksdazzle_send_irq(struct urb *urb);
214static 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 */
241static 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 kingsun->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 */
301static int ksdazzle_hard_xmit(struct sk_buff *skb, struct net_device *netdev)
302{
303 struct ksdazzle_cb *kingsun;
304 unsigned int wraplen;
305 int ret = 0;
306
307 if (skb == NULL || netdev == NULL)
308 return -EINVAL;
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 err("ksdazzle_hard_xmit: failed tx_urb submit: %d", ret);
327 switch (ret) {
328 case -ENODEV:
329 case -EPIPE:
330 break;
331 default:
332 kingsun->stats.tx_errors++;
333 netif_start_queue(netdev);
334 }
335 } else {
336 kingsun->stats.tx_packets++;
337 kingsun->stats.tx_bytes += skb->len;
338
339 }
340
341 dev_kfree_skb(skb);
342 spin_unlock(&kingsun->lock);
343
344 return ret;
345}
346
347/* Receive callback function */
348static void ksdazzle_rcv_irq(struct urb *urb)
349{
350 struct ksdazzle_cb *kingsun = urb->context;
351
352 /* in process of stopping, just drop data */
353 if (!netif_running(kingsun->netdev)) {
354 kingsun->receiving = 0;
355 return;
356 }
357
358 /* unlink, shutdown, unplug, other nasties */
359 if (urb->status != 0) {
360 err("ksdazzle_rcv_irq: urb asynchronously failed - %d",
361 urb->status);
362 kingsun->receiving = 0;
363 return;
364 }
365
366 if (urb->actual_length > 0) {
367 __u8 *bytes = urb->transfer_buffer;
368 unsigned int i;
369
370 for (i = 0; i < urb->actual_length; i++) {
371 async_unwrap_char(kingsun->netdev, &kingsun->stats,
372 &kingsun->rx_unwrap_buff, bytes[i]);
373 }
4a1d7c25
AVL		 374 kingsun->receiving =
375 (kingsun->rx_unwrap_buff.state != OUTSIDE_FRAME) ? 1 : 0;
376 }
377
378 /* This urb has already been filled in ksdazzle_net_open. It is assumed that
379 urb keeps the pointer to the payload buffer.
380 */
381 urb->status = 0;
382 usb_submit_urb(urb, GFP_ATOMIC);
383}
384
385/*
386 * Function ksdazzle_net_open (dev)
387 *
388 * Network device is taken up. Usually this is done by "ifconfig irda0 up"
389 */
390static int ksdazzle_net_open(struct net_device *netdev)
391{
392 struct ksdazzle_cb *kingsun = netdev_priv(netdev);
393 int err = -ENOMEM;
394 char hwname[16];
395
396 /* At this point, urbs are NULL, and skb is NULL (see ksdazzle_probe) */
397 kingsun->receiving = 0;
398
399 /* Initialize for SIR to copy data directly into skb. */
400 kingsun->rx_unwrap_buff.in_frame = FALSE;
401 kingsun->rx_unwrap_buff.state = OUTSIDE_FRAME;
402 kingsun->rx_unwrap_buff.truesize = IRDA_SKB_MAX_MTU;
403 kingsun->rx_unwrap_buff.skb = dev_alloc_skb(IRDA_SKB_MAX_MTU);
404 if (!kingsun->rx_unwrap_buff.skb)
405 goto free_mem;
406
407 skb_reserve(kingsun->rx_unwrap_buff.skb, 1);
408 kingsun->rx_unwrap_buff.head = kingsun->rx_unwrap_buff.skb->data;
409
410 kingsun->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
411 if (!kingsun->rx_urb)
412 goto free_mem;
413
414 kingsun->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
415 if (!kingsun->tx_urb)
416 goto free_mem;
417
418 kingsun->speed_urb = usb_alloc_urb(0, GFP_KERNEL);
419 if (!kingsun->speed_urb)
420 goto free_mem;
421
422 /* Initialize speed for dongle */
423 kingsun->new_speed = 9600;
424 err = ksdazzle_change_speed(kingsun, 9600);
425 if (err < 0)
426 goto free_mem;
427
428 /*
429 * Now that everything should be initialized properly,
430 * Open new IrLAP layer instance to take care of us...
431 */
432 sprintf(hwname, "usb#%d", kingsun->usbdev->devnum);
433 kingsun->irlap = irlap_open(netdev, &kingsun->qos, hwname);
434 if (!kingsun->irlap) {
435 err("ksdazzle-sir: irlap_open failed");
436 goto free_mem;
437 }
438
439 /* Start reception. */
440 usb_fill_int_urb(kingsun->rx_urb, kingsun->usbdev,
441 usb_rcvintpipe(kingsun->usbdev, kingsun->ep_in),
630e4997
AVL		 442 kingsun->rx_buf, KINGSUN_RCV_MAX, ksdazzle_rcv_irq,
443 kingsun, 1);
4a1d7c25
AVL		 444 kingsun->rx_urb->status = 0;
445 err = usb_submit_urb(kingsun->rx_urb, GFP_KERNEL);
446 if (err) {
447 err("ksdazzle-sir: first urb-submit failed: %d", err);
448 goto close_irlap;
449 }
450
451 netif_start_queue(netdev);
452
453 /* Situation at this point:
454 - all work buffers allocated
455 - urbs allocated and ready to fill
456 - max rx packet known (in max_rx)
457 - unwrap state machine initialized, in state outside of any frame
458 - receive request in progress
459 - IrLAP layer started, about to hand over packets to send
460 */
461
462 return 0;
463
464 close_irlap:
465 irlap_close(kingsun->irlap);
466 free_mem:
467 usb_free_urb(kingsun->speed_urb);
468 kingsun->speed_urb = NULL;
469 usb_free_urb(kingsun->tx_urb);
470 kingsun->tx_urb = NULL;
471 usb_free_urb(kingsun->rx_urb);
472 kingsun->rx_urb = NULL;
473 if (kingsun->rx_unwrap_buff.skb) {
474 kfree_skb(kingsun->rx_unwrap_buff.skb);
475 kingsun->rx_unwrap_buff.skb = NULL;
476 kingsun->rx_unwrap_buff.head = NULL;
477 }
478 return err;
479}
480
481/*
482 * Function ksdazzle_net_close (dev)
483 *
484 * Network device is taken down. Usually this is done by
485 * "ifconfig irda0 down"
486 */
487static int ksdazzle_net_close(struct net_device *netdev)
488{
489 struct ksdazzle_cb *kingsun = netdev_priv(netdev);
490
491 /* Stop transmit processing */
492 netif_stop_queue(netdev);
493
494 /* Mop up receive && transmit urb's */
495 usb_kill_urb(kingsun->tx_urb);
496 usb_free_urb(kingsun->tx_urb);
497 kingsun->tx_urb = NULL;
498
499 usb_kill_urb(kingsun->speed_urb);
500 usb_free_urb(kingsun->speed_urb);
501 kingsun->speed_urb = NULL;
502
503 usb_kill_urb(kingsun->rx_urb);
504 usb_free_urb(kingsun->rx_urb);
505 kingsun->rx_urb = NULL;
506
507 kfree_skb(kingsun->rx_unwrap_buff.skb);
508 kingsun->rx_unwrap_buff.skb = NULL;
509 kingsun->rx_unwrap_buff.head = NULL;
510 kingsun->rx_unwrap_buff.in_frame = FALSE;
511 kingsun->rx_unwrap_buff.state = OUTSIDE_FRAME;
512 kingsun->receiving = 0;
513
514 /* Stop and remove instance of IrLAP */
515 irlap_close(kingsun->irlap);
516
517 kingsun->irlap = NULL;
518
519 return 0;
520}
521
522/*
523 * IOCTLs : Extra out-of-band network commands...
524 */
525static int ksdazzle_net_ioctl(struct net_device *netdev, struct ifreq *rq,
526 int cmd)
527{
528 struct if_irda_req *irq = (struct if_irda_req *)rq;
529 struct ksdazzle_cb *kingsun = netdev_priv(netdev);
530 int ret = 0;
531
532 switch (cmd) {
533 case SIOCSBANDWIDTH: /* Set bandwidth */
534 if (!capable(CAP_NET_ADMIN))
535 return -EPERM;
536
537 /* Check if the device is still there */
538 if (netif_device_present(kingsun->netdev))
539 return ksdazzle_change_speed(kingsun,
540 irq->ifr_baudrate);
541 break;
542
543 case SIOCSMEDIABUSY: /* Set media busy */
544 if (!capable(CAP_NET_ADMIN))
545 return -EPERM;
546
547 /* Check if the IrDA stack is still there */
548 if (netif_running(kingsun->netdev))
549 irda_device_set_media_busy(kingsun->netdev, TRUE);
550 break;
551
552 case SIOCGRECEIVING:
553 /* Only approximately true */
554 irq->ifr_receiving = kingsun->receiving;
555 break;
556
557 default:
558 ret = -EOPNOTSUPP;
559 }
560
561 return ret;
562}
563
564/*
565 * Get device stats (for /proc/net/dev and ifconfig)
566 */
567static struct net_device_stats *ksdazzle_net_get_stats(struct net_device
568 *netdev)
569{
570 struct ksdazzle_cb *kingsun = netdev_priv(netdev);
571 return &kingsun->stats;
572}
573
574/*
575 * This routine is called by the USB subsystem for each new device
576 * in the system. We need to check if the device is ours, and in
577 * this case start handling it.
578 */
579static int ksdazzle_probe(struct usb_interface *intf,
580 const struct usb_device_id *id)
581{
582 struct usb_host_interface *interface;
583 struct usb_endpoint_descriptor *endpoint;
584
585 struct usb_device *dev = interface_to_usbdev(intf);
586 struct ksdazzle_cb *kingsun = NULL;
587 struct net_device *net = NULL;
588 int ret = -ENOMEM;
589 int pipe, maxp_in, maxp_out;
590 __u8 ep_in;
591 __u8 ep_out;
592
593 /* Check that there really are two interrupt endpoints. Check based on the
594 one in drivers/usb/input/usbmouse.c
595 */
596 interface = intf->cur_altsetting;
597 if (interface->desc.bNumEndpoints != 2) {
598 err("ksdazzle: expected 2 endpoints, found %d",
599 interface->desc.bNumEndpoints);
600 return -ENODEV;
601 }
602 endpoint = &interface->endpoint[KINGSUN_EP_IN].desc;
603 if (!usb_endpoint_is_int_in(endpoint)) {
604 err("ksdazzle: endpoint 0 is not interrupt IN");
605 return -ENODEV;
606 }
607
608 ep_in = endpoint->bEndpointAddress;
609 pipe = usb_rcvintpipe(dev, ep_in);
610 maxp_in = usb_maxpacket(dev, pipe, usb_pipeout(pipe));
611 if (maxp_in > 255 || maxp_in <= 1) {
612 err("ksdazzle: endpoint 0 has max packet size %d not in range [2..255]", maxp_in);
613 return -ENODEV;
614 }
615
616 endpoint = &interface->endpoint[KINGSUN_EP_OUT].desc;
617 if (!usb_endpoint_is_int_out(endpoint)) {
618 err("ksdazzle: endpoint 1 is not interrupt OUT");
619 return -ENODEV;
620 }
621
622 ep_out = endpoint->bEndpointAddress;
623 pipe = usb_sndintpipe(dev, ep_out);
624 maxp_out = usb_maxpacket(dev, pipe, usb_pipeout(pipe));
625
626 /* Allocate network device container. */
627 net = alloc_irdadev(sizeof(*kingsun));
628 if (!net)
629 goto err_out1;
630
4a1d7c25
AVL		 631 SET_NETDEV_DEV(net, &intf->dev);
632 kingsun = netdev_priv(net);
633 kingsun->netdev = net;
634 kingsun->usbdev = dev;
635 kingsun->ep_in = ep_in;
636 kingsun->ep_out = ep_out;
637 kingsun->irlap = NULL;
638 kingsun->tx_urb = NULL;
639 kingsun->tx_buf_clear = NULL;
640 kingsun->tx_buf_clear_used = 0;
641 kingsun->tx_buf_clear_sent = 0;
642
643 kingsun->rx_urb = NULL;
630e4997 644 kingsun->rx_buf = NULL;
4a1d7c25
AVL		 645 kingsun->rx_unwrap_buff.in_frame = FALSE;
646 kingsun->rx_unwrap_buff.state = OUTSIDE_FRAME;
647 kingsun->rx_unwrap_buff.skb = NULL;
648 kingsun->receiving = 0;
649 spin_lock_init(&kingsun->lock);
650
651 kingsun->speed_setuprequest = NULL;
652 kingsun->speed_urb = NULL;
653 kingsun->speedparams.baudrate = 0;
654
630e4997
AVL		 655 /* Allocate input buffer */
656 kingsun->rx_buf = kmalloc(KINGSUN_RCV_MAX, GFP_KERNEL);
657 if (!kingsun->rx_buf)
658 goto free_mem;
659
4a1d7c25
AVL		 660 /* Allocate output buffer */
661 kingsun->tx_buf_clear = kmalloc(KINGSUN_SND_FIFO_SIZE, GFP_KERNEL);
662 if (!kingsun->tx_buf_clear)
663 goto free_mem;
664
665 /* Allocate and initialize speed setup packet */
666 kingsun->speed_setuprequest =
667 kmalloc(sizeof(struct usb_ctrlrequest), GFP_KERNEL);
668 if (!kingsun->speed_setuprequest)
669 goto free_mem;
670 kingsun->speed_setuprequest->bRequestType =
671 USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE;
672 kingsun->speed_setuprequest->bRequest = KINGSUN_REQ_SEND;
673 kingsun->speed_setuprequest->wValue = cpu_to_le16(0x0200);
674 kingsun->speed_setuprequest->wIndex = cpu_to_le16(0x0001);
675 kingsun->speed_setuprequest->wLength =
676 cpu_to_le16(sizeof(struct ksdazzle_speedparams));
677
678 printk(KERN_INFO "KingSun/Dazzle IRDA/USB found at address %d, "
679 "Vendor: %x, Product: %x\n",
680 dev->devnum, le16_to_cpu(dev->descriptor.idVendor),
681 le16_to_cpu(dev->descriptor.idProduct));
682
683 /* Initialize QoS for this device */
684 irda_init_max_qos_capabilies(&kingsun->qos);
685
686 /* Baud rates known to be supported. Please uncomment if devices (other
687 than a SonyEriccson K300 phone) can be shown to support higher speeds
688 with this dongle.
689 */
690 kingsun->qos.baud_rate.bits =
691 IR_2400 | IR_9600 | IR_19200 | IR_38400 | IR_57600 | IR_115200;
692 kingsun->qos.min_turn_time.bits &= KINGSUN_MTT;
693 irda_qos_bits_to_value(&kingsun->qos);
694
695 /* Override the network functions we need to use */
696 net->hard_start_xmit = ksdazzle_hard_xmit;
697 net->open = ksdazzle_net_open;
698 net->stop = ksdazzle_net_close;
699 net->get_stats = ksdazzle_net_get_stats;
700 net->do_ioctl = ksdazzle_net_ioctl;
701
702 ret = register_netdev(net);
703 if (ret != 0)
704 goto free_mem;
705
880c9c66
GKH		 706 dev_info(&net->dev, "IrDA: Registered KingSun/Dazzle device %s\n",
707 net->name);
4a1d7c25
AVL		 708
709 usb_set_intfdata(intf, kingsun);
710
711 /* Situation at this point:
712 - all work buffers allocated
713 - setup requests pre-filled
714 - urbs not allocated, set to NULL
715 - max rx packet known (is KINGSUN_FIFO_SIZE)
716 - unwrap state machine (partially) initialized, but skb == NULL
717 */
718
719 return 0;
720
721 free_mem:
722 kfree(kingsun->speed_setuprequest);
723 kfree(kingsun->tx_buf_clear);
630e4997 724 kfree(kingsun->rx_buf);
4a1d7c25
AVL		 725 free_netdev(net);
726 err_out1:
727 return ret;
728}
729
730/*
731 * The current device is removed, the USB layer tell us to shut it down...
732 */
733static void ksdazzle_disconnect(struct usb_interface *intf)
734{
735 struct ksdazzle_cb *kingsun = usb_get_intfdata(intf);
736
737 if (!kingsun)
738 return;
739
740 unregister_netdev(kingsun->netdev);
741
742 /* Mop up receive && transmit urb's */
743 usb_kill_urb(kingsun->speed_urb);
744 usb_free_urb(kingsun->speed_urb);
745 kingsun->speed_urb = NULL;
746
747 usb_kill_urb(kingsun->tx_urb);
748 usb_free_urb(kingsun->tx_urb);
749 kingsun->tx_urb = NULL;
750
751 usb_kill_urb(kingsun->rx_urb);
752 usb_free_urb(kingsun->rx_urb);
753 kingsun->rx_urb = NULL;
754
755 kfree(kingsun->speed_setuprequest);
756 kfree(kingsun->tx_buf_clear);
630e4997 757 kfree(kingsun->rx_buf);
4a1d7c25
AVL		 758 free_netdev(kingsun->netdev);
759
760 usb_set_intfdata(intf, NULL);
761}
762
763#ifdef CONFIG_PM
764/* USB suspend, so power off the transmitter/receiver */
765static int ksdazzle_suspend(struct usb_interface *intf, pm_message_t message)
766{
767 struct ksdazzle_cb *kingsun = usb_get_intfdata(intf);
768
769 netif_device_detach(kingsun->netdev);
770 if (kingsun->speed_urb != NULL)
771 usb_kill_urb(kingsun->speed_urb);
772 if (kingsun->tx_urb != NULL)
773 usb_kill_urb(kingsun->tx_urb);
774 if (kingsun->rx_urb != NULL)
775 usb_kill_urb(kingsun->rx_urb);
776 return 0;
777}
778
779/* Coming out of suspend, so reset hardware */
780static int ksdazzle_resume(struct usb_interface *intf)
781{
782 struct ksdazzle_cb *kingsun = usb_get_intfdata(intf);
783
784 if (kingsun->rx_urb != NULL) {
785 /* Setup request already filled in ksdazzle_probe */
786 usb_submit_urb(kingsun->rx_urb, GFP_KERNEL);
787 }
788 netif_device_attach(kingsun->netdev);
789
790 return 0;
791}
792#endif
793
794/*
795 * USB device callbacks
796 */
797static struct usb_driver irda_driver = {
798 .name = "ksdazzle-sir",
799 .probe = ksdazzle_probe,
800 .disconnect = ksdazzle_disconnect,
801 .id_table = dongles,
802#ifdef CONFIG_PM
803 .suspend = ksdazzle_suspend,
804 .resume = ksdazzle_resume,
805#endif
806};
807
808/*
809 * Module insertion
810 */
811static int __init ksdazzle_init(void)
812{
813 return usb_register(&irda_driver);
814}
815
816module_init(ksdazzle_init);
817
818/*
819 * Module removal
820 */
821static void __exit ksdazzle_cleanup(void)
822{
823 /* Deregister the driver and remove all pending instances */
824 usb_deregister(&irda_driver);
825}
826
827module_exit(ksdazzle_cleanup);
828
829MODULE_AUTHOR("Alex Villacís Lasso <a_villacis@palosanto.com>");
830MODULE_DESCRIPTION("IrDA-USB Dongle Driver for KingSun Dazzle");
831MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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