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a2af421f AVL |
1 | /***************************************************************************** |
2 | * | |
3 | * Filename: kingsun-sir.c | |
4 | * Version: 0.1.1 | |
5 | * Description: Irda KingSun/DonShine USB Dongle | |
6 | * Status: Experimental | |
66f5e51e | 7 | * Author: Alex Villacís Lasso <a_villacis@palosanto.com> |
a2af421f AVL |
8 | * |
9 | * Based on stir4200 and mcs7780 drivers, with (strange?) differences | |
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 | * This is my current (2007-04-25) understanding of how this dongle is supposed | |
28 | * to work. This is based on reverse-engineering and examination of the packet | |
29 | * data sent and received by the WinXP driver using USBSnoopy. Feel free to | |
30 | * update here as more of this dongle is known: | |
31 | * | |
32 | * General: Unlike the other USB IrDA dongles, this particular dongle exposes, | |
33 | * not two bulk (in and out) endpoints, but two *interrupt* ones. This dongle, | |
34 | * like the bulk based ones (stir4200.c and mcs7780.c), requires polling in | |
35 | * order to receive data. | |
36 | * Transmission: Just like stir4200, this dongle uses a raw stream of data, | |
37 | * which needs to be wrapped and escaped in a similar way as in stir4200.c. | |
38 | * Reception: Poll-based, as in stir4200. Each read returns the contents of a | |
39 | * 8-byte buffer, of which the first byte (LSB) indicates the number of bytes | |
40 | * (1-7) of valid data contained within the remaining 7 bytes. For example, if | |
41 | * the buffer had the following contents: | |
42 | * 06 ff ff ff c0 01 04 aa | |
43 | * This means that (06) there are 6 bytes of valid data. The byte 0xaa at the | |
44 | * end is garbage (left over from a previous reception) and is discarded. | |
45 | * If a read returns an "impossible" value as the length of valid data (such as | |
46 | * 0x36) in the first byte, then the buffer is uninitialized (as is the case of | |
47 | * first plug-in) and its contents should be discarded. There is currently no | |
48 | * evidence that the top 5 bits of the 1st byte of the buffer can have values | |
49 | * other than 0 once reception begins. | |
50 | * Once valid bytes are collected, the assembled stream is a sequence of | |
51 | * wrapped IrDA frames that is unwrapped and unescaped as in stir4200.c. | |
52 | * BIG FAT WARNING: the dongle does *not* reset the RX buffer in any way after | |
53 | * a successful read from the host, which means that in absence of further | |
54 | * reception, repeated reads from the dongle will return the exact same | |
55 | * contents repeatedly. Attempts to be smart and cache a previous read seem | |
56 | * to result in corrupted packets, so this driver depends on the unwrap logic | |
57 | * to sort out any repeated reads. | |
58 | * Speed change: no commands observed so far to change speed, assumed fixed | |
59 | * 9600bps (SIR). | |
60 | */ | |
61 | ||
62 | #include <linux/module.h> | |
63 | #include <linux/moduleparam.h> | |
64 | #include <linux/kernel.h> | |
65 | #include <linux/types.h> | |
66 | #include <linux/errno.h> | |
67 | #include <linux/init.h> | |
68 | #include <linux/slab.h> | |
a2af421f AVL |
69 | #include <linux/kref.h> |
70 | #include <linux/usb.h> | |
71 | #include <linux/device.h> | |
72 | #include <linux/crc32.h> | |
73 | ||
74 | #include <asm/unaligned.h> | |
75 | #include <asm/byteorder.h> | |
76 | #include <asm/uaccess.h> | |
77 | ||
78 | #include <net/irda/irda.h> | |
79 | #include <net/irda/wrapper.h> | |
80 | #include <net/irda/crc.h> | |
81 | ||
82 | /* | |
83 | * According to lsusb, 0x07c0 is assigned to | |
84 | * "Code Mercenaries Hard- und Software GmbH" | |
85 | */ | |
86 | #define KING_VENDOR_ID 0x07c0 | |
87 | #define KING_PRODUCT_ID 0x4200 | |
88 | ||
89 | /* These are the currently known USB ids */ | |
90 | static struct usb_device_id dongles[] = { | |
91 | /* KingSun Co,Ltd IrDA/USB Bridge */ | |
92 | { USB_DEVICE(KING_VENDOR_ID, KING_PRODUCT_ID) }, | |
93 | { } | |
94 | }; | |
95 | ||
96 | MODULE_DEVICE_TABLE(usb, dongles); | |
97 | ||
98 | #define KINGSUN_MTT 0x07 | |
99 | ||
100 | #define KINGSUN_FIFO_SIZE 4096 | |
101 | #define KINGSUN_EP_IN 0 | |
102 | #define KINGSUN_EP_OUT 1 | |
103 | ||
104 | struct kingsun_cb { | |
105 | struct usb_device *usbdev; /* init: probe_irda */ | |
106 | struct net_device *netdev; /* network layer */ | |
107 | struct irlap_cb *irlap; /* The link layer we are binded to */ | |
af049081 | 108 | |
a2af421f AVL |
109 | struct qos_info qos; |
110 | ||
111 | __u8 *in_buf; /* receive buffer */ | |
112 | __u8 *out_buf; /* transmit buffer */ | |
113 | __u8 max_rx; /* max. atomic read from dongle | |
114 | (usually 8), also size of in_buf */ | |
115 | __u8 max_tx; /* max. atomic write to dongle | |
116 | (usually 8) */ | |
117 | ||
118 | iobuff_t rx_buff; /* receive unwrap state machine */ | |
119 | struct timeval rx_time; | |
120 | spinlock_t lock; | |
121 | int receiving; | |
122 | ||
123 | __u8 ep_in; | |
124 | __u8 ep_out; | |
125 | ||
126 | struct urb *tx_urb; | |
127 | struct urb *rx_urb; | |
128 | }; | |
129 | ||
130 | /* Callback transmission routine */ | |
131 | static void kingsun_send_irq(struct urb *urb) | |
132 | { | |
133 | struct kingsun_cb *kingsun = urb->context; | |
134 | struct net_device *netdev = kingsun->netdev; | |
135 | ||
136 | /* in process of stopping, just drop data */ | |
137 | if (!netif_running(kingsun->netdev)) { | |
138 | err("kingsun_send_irq: Network not running!"); | |
139 | return; | |
140 | } | |
141 | ||
142 | /* unlink, shutdown, unplug, other nasties */ | |
143 | if (urb->status != 0) { | |
144 | err("kingsun_send_irq: urb asynchronously failed - %d", | |
145 | urb->status); | |
146 | } | |
147 | netif_wake_queue(netdev); | |
148 | } | |
149 | ||
150 | /* | |
151 | * Called from net/core when new frame is available. | |
152 | */ | |
6518bbb8 SH |
153 | static netdev_tx_t kingsun_hard_xmit(struct sk_buff *skb, |
154 | struct net_device *netdev) | |
a2af421f AVL |
155 | { |
156 | struct kingsun_cb *kingsun; | |
157 | int wraplen; | |
158 | int ret = 0; | |
159 | ||
a2af421f AVL |
160 | netif_stop_queue(netdev); |
161 | ||
162 | /* the IRDA wrapping routines don't deal with non linear skb */ | |
163 | SKB_LINEAR_ASSERT(skb); | |
164 | ||
165 | kingsun = netdev_priv(netdev); | |
166 | ||
167 | spin_lock(&kingsun->lock); | |
168 | ||
169 | /* Append data to the end of whatever data remains to be transmitted */ | |
170 | wraplen = async_wrap_skb(skb, | |
171 | kingsun->out_buf, | |
172 | KINGSUN_FIFO_SIZE); | |
173 | ||
174 | /* Calculate how much data can be transmitted in this urb */ | |
175 | usb_fill_int_urb(kingsun->tx_urb, kingsun->usbdev, | |
176 | usb_sndintpipe(kingsun->usbdev, kingsun->ep_out), | |
177 | kingsun->out_buf, wraplen, kingsun_send_irq, | |
178 | kingsun, 1); | |
179 | ||
180 | if ((ret = usb_submit_urb(kingsun->tx_urb, GFP_ATOMIC))) { | |
181 | err("kingsun_hard_xmit: failed tx_urb submit: %d", ret); | |
182 | switch (ret) { | |
183 | case -ENODEV: | |
184 | case -EPIPE: | |
185 | break; | |
186 | default: | |
af049081 | 187 | netdev->stats.tx_errors++; |
a2af421f AVL |
188 | netif_start_queue(netdev); |
189 | } | |
190 | } else { | |
af049081 SH |
191 | netdev->stats.tx_packets++; |
192 | netdev->stats.tx_bytes += skb->len; | |
a2af421f AVL |
193 | } |
194 | ||
195 | dev_kfree_skb(skb); | |
196 | spin_unlock(&kingsun->lock); | |
197 | ||
4bd73ae2 | 198 | return NETDEV_TX_OK; |
a2af421f AVL |
199 | } |
200 | ||
201 | /* Receive callback function */ | |
202 | static void kingsun_rcv_irq(struct urb *urb) | |
203 | { | |
204 | struct kingsun_cb *kingsun = urb->context; | |
205 | int ret; | |
206 | ||
207 | /* in process of stopping, just drop data */ | |
208 | if (!netif_running(kingsun->netdev)) { | |
209 | kingsun->receiving = 0; | |
210 | return; | |
211 | } | |
212 | ||
213 | /* unlink, shutdown, unplug, other nasties */ | |
214 | if (urb->status != 0) { | |
215 | err("kingsun_rcv_irq: urb asynchronously failed - %d", | |
216 | urb->status); | |
217 | kingsun->receiving = 0; | |
218 | return; | |
219 | } | |
220 | ||
221 | if (urb->actual_length == kingsun->max_rx) { | |
222 | __u8 *bytes = urb->transfer_buffer; | |
223 | int i; | |
224 | ||
225 | /* The very first byte in the buffer indicates the length of | |
226 | valid data in the read. This byte must be in the range | |
227 | 1..kingsun->max_rx -1 . Values outside this range indicate | |
228 | an uninitialized Rx buffer when the dongle has just been | |
229 | plugged in. */ | |
230 | if (bytes[0] >= 1 && bytes[0] < kingsun->max_rx) { | |
231 | for (i = 1; i <= bytes[0]; i++) { | |
232 | async_unwrap_char(kingsun->netdev, | |
af049081 | 233 | &kingsun->netdev->stats, |
a2af421f AVL |
234 | &kingsun->rx_buff, bytes[i]); |
235 | } | |
a2af421f AVL |
236 | do_gettimeofday(&kingsun->rx_time); |
237 | kingsun->receiving = | |
238 | (kingsun->rx_buff.state != OUTSIDE_FRAME) | |
239 | ? 1 : 0; | |
240 | } | |
241 | } else if (urb->actual_length > 0) { | |
242 | err("%s(): Unexpected response length, expected %d got %d", | |
a97a6f10 | 243 | __func__, kingsun->max_rx, urb->actual_length); |
a2af421f AVL |
244 | } |
245 | /* This urb has already been filled in kingsun_net_open */ | |
246 | ret = usb_submit_urb(urb, GFP_ATOMIC); | |
247 | } | |
248 | ||
249 | /* | |
250 | * Function kingsun_net_open (dev) | |
251 | * | |
252 | * Network device is taken up. Usually this is done by "ifconfig irda0 up" | |
253 | */ | |
254 | static int kingsun_net_open(struct net_device *netdev) | |
255 | { | |
256 | struct kingsun_cb *kingsun = netdev_priv(netdev); | |
257 | int err = -ENOMEM; | |
258 | char hwname[16]; | |
259 | ||
260 | /* At this point, urbs are NULL, and skb is NULL (see kingsun_probe) */ | |
261 | kingsun->receiving = 0; | |
262 | ||
263 | /* Initialize for SIR to copy data directly into skb. */ | |
264 | kingsun->rx_buff.in_frame = FALSE; | |
265 | kingsun->rx_buff.state = OUTSIDE_FRAME; | |
266 | kingsun->rx_buff.truesize = IRDA_SKB_MAX_MTU; | |
267 | kingsun->rx_buff.skb = dev_alloc_skb(IRDA_SKB_MAX_MTU); | |
268 | if (!kingsun->rx_buff.skb) | |
269 | goto free_mem; | |
270 | ||
271 | skb_reserve(kingsun->rx_buff.skb, 1); | |
272 | kingsun->rx_buff.head = kingsun->rx_buff.skb->data; | |
273 | do_gettimeofday(&kingsun->rx_time); | |
274 | ||
275 | kingsun->rx_urb = usb_alloc_urb(0, GFP_KERNEL); | |
276 | if (!kingsun->rx_urb) | |
277 | goto free_mem; | |
278 | ||
279 | kingsun->tx_urb = usb_alloc_urb(0, GFP_KERNEL); | |
280 | if (!kingsun->tx_urb) | |
281 | goto free_mem; | |
282 | ||
283 | /* | |
284 | * Now that everything should be initialized properly, | |
285 | * Open new IrLAP layer instance to take care of us... | |
286 | */ | |
287 | sprintf(hwname, "usb#%d", kingsun->usbdev->devnum); | |
288 | kingsun->irlap = irlap_open(netdev, &kingsun->qos, hwname); | |
289 | if (!kingsun->irlap) { | |
290 | err("kingsun-sir: irlap_open failed"); | |
291 | goto free_mem; | |
292 | } | |
293 | ||
294 | /* Start first reception */ | |
295 | usb_fill_int_urb(kingsun->rx_urb, kingsun->usbdev, | |
296 | usb_rcvintpipe(kingsun->usbdev, kingsun->ep_in), | |
297 | kingsun->in_buf, kingsun->max_rx, | |
298 | kingsun_rcv_irq, kingsun, 1); | |
299 | kingsun->rx_urb->status = 0; | |
300 | err = usb_submit_urb(kingsun->rx_urb, GFP_KERNEL); | |
301 | if (err) { | |
302 | err("kingsun-sir: first urb-submit failed: %d", err); | |
303 | goto close_irlap; | |
304 | } | |
305 | ||
306 | netif_start_queue(netdev); | |
307 | ||
308 | /* Situation at this point: | |
309 | - all work buffers allocated | |
310 | - urbs allocated and ready to fill | |
311 | - max rx packet known (in max_rx) | |
312 | - unwrap state machine initialized, in state outside of any frame | |
313 | - receive request in progress | |
314 | - IrLAP layer started, about to hand over packets to send | |
315 | */ | |
316 | ||
317 | return 0; | |
318 | ||
319 | close_irlap: | |
320 | irlap_close(kingsun->irlap); | |
321 | free_mem: | |
322 | if (kingsun->tx_urb) { | |
323 | usb_free_urb(kingsun->tx_urb); | |
324 | kingsun->tx_urb = NULL; | |
325 | } | |
326 | if (kingsun->rx_urb) { | |
327 | usb_free_urb(kingsun->rx_urb); | |
328 | kingsun->rx_urb = NULL; | |
329 | } | |
330 | if (kingsun->rx_buff.skb) { | |
331 | kfree_skb(kingsun->rx_buff.skb); | |
332 | kingsun->rx_buff.skb = NULL; | |
333 | kingsun->rx_buff.head = NULL; | |
334 | } | |
335 | return err; | |
336 | } | |
337 | ||
338 | /* | |
339 | * Function kingsun_net_close (kingsun) | |
340 | * | |
341 | * Network device is taken down. Usually this is done by | |
342 | * "ifconfig irda0 down" | |
343 | */ | |
344 | static int kingsun_net_close(struct net_device *netdev) | |
345 | { | |
346 | struct kingsun_cb *kingsun = netdev_priv(netdev); | |
347 | ||
348 | /* Stop transmit processing */ | |
349 | netif_stop_queue(netdev); | |
350 | ||
351 | /* Mop up receive && transmit urb's */ | |
352 | usb_kill_urb(kingsun->tx_urb); | |
353 | usb_kill_urb(kingsun->rx_urb); | |
354 | ||
355 | usb_free_urb(kingsun->tx_urb); | |
356 | usb_free_urb(kingsun->rx_urb); | |
357 | ||
358 | kingsun->tx_urb = NULL; | |
359 | kingsun->rx_urb = NULL; | |
360 | ||
361 | kfree_skb(kingsun->rx_buff.skb); | |
362 | kingsun->rx_buff.skb = NULL; | |
363 | kingsun->rx_buff.head = NULL; | |
364 | kingsun->rx_buff.in_frame = FALSE; | |
365 | kingsun->rx_buff.state = OUTSIDE_FRAME; | |
366 | kingsun->receiving = 0; | |
367 | ||
368 | /* Stop and remove instance of IrLAP */ | |
369 | if (kingsun->irlap) | |
370 | irlap_close(kingsun->irlap); | |
371 | ||
372 | kingsun->irlap = NULL; | |
373 | ||
374 | return 0; | |
375 | } | |
376 | ||
377 | /* | |
378 | * IOCTLs : Extra out-of-band network commands... | |
379 | */ | |
380 | static int kingsun_net_ioctl(struct net_device *netdev, struct ifreq *rq, | |
381 | int cmd) | |
382 | { | |
383 | struct if_irda_req *irq = (struct if_irda_req *) rq; | |
384 | struct kingsun_cb *kingsun = netdev_priv(netdev); | |
385 | int ret = 0; | |
386 | ||
387 | switch (cmd) { | |
388 | case SIOCSBANDWIDTH: /* Set bandwidth */ | |
389 | if (!capable(CAP_NET_ADMIN)) | |
390 | return -EPERM; | |
391 | ||
392 | /* Check if the device is still there */ | |
393 | if (netif_device_present(kingsun->netdev)) | |
394 | /* No observed commands for speed change */ | |
395 | ret = -EOPNOTSUPP; | |
396 | break; | |
397 | ||
398 | case SIOCSMEDIABUSY: /* Set media busy */ | |
399 | if (!capable(CAP_NET_ADMIN)) | |
400 | return -EPERM; | |
401 | ||
402 | /* Check if the IrDA stack is still there */ | |
403 | if (netif_running(kingsun->netdev)) | |
404 | irda_device_set_media_busy(kingsun->netdev, TRUE); | |
405 | break; | |
406 | ||
407 | case SIOCGRECEIVING: | |
408 | /* Only approximately true */ | |
409 | irq->ifr_receiving = kingsun->receiving; | |
410 | break; | |
411 | ||
412 | default: | |
413 | ret = -EOPNOTSUPP; | |
414 | } | |
415 | ||
416 | return ret; | |
417 | } | |
418 | ||
9b634007 | 419 | static const struct net_device_ops kingsun_ops = { |
6518bbb8 | 420 | .ndo_start_xmit = kingsun_hard_xmit, |
9b634007 SH |
421 | .ndo_open = kingsun_net_open, |
422 | .ndo_stop = kingsun_net_close, | |
423 | .ndo_do_ioctl = kingsun_net_ioctl, | |
424 | }; | |
a2af421f AVL |
425 | |
426 | /* | |
427 | * This routine is called by the USB subsystem for each new device | |
428 | * in the system. We need to check if the device is ours, and in | |
429 | * this case start handling it. | |
430 | */ | |
431 | static int kingsun_probe(struct usb_interface *intf, | |
432 | const struct usb_device_id *id) | |
433 | { | |
434 | struct usb_host_interface *interface; | |
435 | struct usb_endpoint_descriptor *endpoint; | |
436 | ||
437 | struct usb_device *dev = interface_to_usbdev(intf); | |
438 | struct kingsun_cb *kingsun = NULL; | |
439 | struct net_device *net = NULL; | |
440 | int ret = -ENOMEM; | |
441 | int pipe, maxp_in, maxp_out; | |
442 | __u8 ep_in; | |
443 | __u8 ep_out; | |
444 | ||
445 | /* Check that there really are two interrupt endpoints. | |
446 | Check based on the one in drivers/usb/input/usbmouse.c | |
447 | */ | |
448 | interface = intf->cur_altsetting; | |
449 | if (interface->desc.bNumEndpoints != 2) { | |
450 | err("kingsun-sir: expected 2 endpoints, found %d", | |
451 | interface->desc.bNumEndpoints); | |
452 | return -ENODEV; | |
453 | } | |
454 | endpoint = &interface->endpoint[KINGSUN_EP_IN].desc; | |
455 | if (!usb_endpoint_is_int_in(endpoint)) { | |
456 | err("kingsun-sir: endpoint 0 is not interrupt IN"); | |
457 | return -ENODEV; | |
458 | } | |
459 | ||
460 | ep_in = endpoint->bEndpointAddress; | |
461 | pipe = usb_rcvintpipe(dev, ep_in); | |
462 | maxp_in = usb_maxpacket(dev, pipe, usb_pipeout(pipe)); | |
463 | if (maxp_in > 255 || maxp_in <= 1) { | |
464 | err("%s: endpoint 0 has max packet size %d not in range", | |
465 | __FILE__, maxp_in); | |
466 | return -ENODEV; | |
467 | } | |
468 | ||
469 | endpoint = &interface->endpoint[KINGSUN_EP_OUT].desc; | |
470 | if (!usb_endpoint_is_int_out(endpoint)) { | |
471 | err("kingsun-sir: endpoint 1 is not interrupt OUT"); | |
472 | return -ENODEV; | |
473 | } | |
474 | ||
475 | ep_out = endpoint->bEndpointAddress; | |
476 | pipe = usb_sndintpipe(dev, ep_out); | |
477 | maxp_out = usb_maxpacket(dev, pipe, usb_pipeout(pipe)); | |
478 | ||
479 | /* Allocate network device container. */ | |
480 | net = alloc_irdadev(sizeof(*kingsun)); | |
481 | if(!net) | |
482 | goto err_out1; | |
483 | ||
a2af421f AVL |
484 | SET_NETDEV_DEV(net, &intf->dev); |
485 | kingsun = netdev_priv(net); | |
486 | kingsun->irlap = NULL; | |
487 | kingsun->tx_urb = NULL; | |
488 | kingsun->rx_urb = NULL; | |
489 | kingsun->ep_in = ep_in; | |
490 | kingsun->ep_out = ep_out; | |
491 | kingsun->in_buf = NULL; | |
492 | kingsun->out_buf = NULL; | |
493 | kingsun->max_rx = (__u8)maxp_in; | |
494 | kingsun->max_tx = (__u8)maxp_out; | |
495 | kingsun->netdev = net; | |
496 | kingsun->usbdev = dev; | |
497 | kingsun->rx_buff.in_frame = FALSE; | |
498 | kingsun->rx_buff.state = OUTSIDE_FRAME; | |
499 | kingsun->rx_buff.skb = NULL; | |
500 | kingsun->receiving = 0; | |
501 | spin_lock_init(&kingsun->lock); | |
502 | ||
503 | /* Allocate input buffer */ | |
901ded25 | 504 | kingsun->in_buf = kmalloc(kingsun->max_rx, GFP_KERNEL); |
a2af421f AVL |
505 | if (!kingsun->in_buf) |
506 | goto free_mem; | |
507 | ||
508 | /* Allocate output buffer */ | |
901ded25 | 509 | kingsun->out_buf = kmalloc(KINGSUN_FIFO_SIZE, GFP_KERNEL); |
a2af421f AVL |
510 | if (!kingsun->out_buf) |
511 | goto free_mem; | |
512 | ||
513 | printk(KERN_INFO "KingSun/DonShine IRDA/USB found at address %d, " | |
514 | "Vendor: %x, Product: %x\n", | |
515 | dev->devnum, le16_to_cpu(dev->descriptor.idVendor), | |
516 | le16_to_cpu(dev->descriptor.idProduct)); | |
517 | ||
518 | /* Initialize QoS for this device */ | |
519 | irda_init_max_qos_capabilies(&kingsun->qos); | |
520 | ||
521 | /* That's the Rx capability. */ | |
522 | kingsun->qos.baud_rate.bits &= IR_9600; | |
523 | kingsun->qos.min_turn_time.bits &= KINGSUN_MTT; | |
524 | irda_qos_bits_to_value(&kingsun->qos); | |
525 | ||
526 | /* Override the network functions we need to use */ | |
9b634007 | 527 | net->netdev_ops = &kingsun_ops; |
a2af421f AVL |
528 | |
529 | ret = register_netdev(net); | |
530 | if (ret != 0) | |
531 | goto free_mem; | |
532 | ||
880c9c66 GKH |
533 | dev_info(&net->dev, "IrDA: Registered KingSun/DonShine device %s\n", |
534 | net->name); | |
a2af421f AVL |
535 | |
536 | usb_set_intfdata(intf, kingsun); | |
537 | ||
538 | /* Situation at this point: | |
539 | - all work buffers allocated | |
540 | - urbs not allocated, set to NULL | |
541 | - max rx packet known (in max_rx) | |
542 | - unwrap state machine (partially) initialized, but skb == NULL | |
543 | */ | |
544 | ||
545 | return 0; | |
546 | ||
547 | free_mem: | |
548 | if (kingsun->out_buf) kfree(kingsun->out_buf); | |
549 | if (kingsun->in_buf) kfree(kingsun->in_buf); | |
550 | free_netdev(net); | |
551 | err_out1: | |
552 | return ret; | |
553 | } | |
554 | ||
555 | /* | |
556 | * The current device is removed, the USB layer tell us to shut it down... | |
557 | */ | |
558 | static void kingsun_disconnect(struct usb_interface *intf) | |
559 | { | |
560 | struct kingsun_cb *kingsun = usb_get_intfdata(intf); | |
561 | ||
562 | if (!kingsun) | |
563 | return; | |
564 | ||
565 | unregister_netdev(kingsun->netdev); | |
566 | ||
567 | /* Mop up receive && transmit urb's */ | |
568 | if (kingsun->tx_urb != NULL) { | |
569 | usb_kill_urb(kingsun->tx_urb); | |
570 | usb_free_urb(kingsun->tx_urb); | |
571 | kingsun->tx_urb = NULL; | |
572 | } | |
573 | if (kingsun->rx_urb != NULL) { | |
574 | usb_kill_urb(kingsun->rx_urb); | |
575 | usb_free_urb(kingsun->rx_urb); | |
576 | kingsun->rx_urb = NULL; | |
577 | } | |
578 | ||
579 | kfree(kingsun->out_buf); | |
580 | kfree(kingsun->in_buf); | |
581 | free_netdev(kingsun->netdev); | |
582 | ||
583 | usb_set_intfdata(intf, NULL); | |
584 | } | |
585 | ||
586 | #ifdef CONFIG_PM | |
587 | /* USB suspend, so power off the transmitter/receiver */ | |
588 | static int kingsun_suspend(struct usb_interface *intf, pm_message_t message) | |
589 | { | |
590 | struct kingsun_cb *kingsun = usb_get_intfdata(intf); | |
591 | ||
592 | netif_device_detach(kingsun->netdev); | |
593 | if (kingsun->tx_urb != NULL) usb_kill_urb(kingsun->tx_urb); | |
594 | if (kingsun->rx_urb != NULL) usb_kill_urb(kingsun->rx_urb); | |
595 | return 0; | |
596 | } | |
597 | ||
598 | /* Coming out of suspend, so reset hardware */ | |
599 | static int kingsun_resume(struct usb_interface *intf) | |
600 | { | |
601 | struct kingsun_cb *kingsun = usb_get_intfdata(intf); | |
602 | ||
603 | if (kingsun->rx_urb != NULL) | |
604 | usb_submit_urb(kingsun->rx_urb, GFP_KERNEL); | |
605 | netif_device_attach(kingsun->netdev); | |
606 | ||
607 | return 0; | |
608 | } | |
609 | #endif | |
610 | ||
611 | /* | |
612 | * USB device callbacks | |
613 | */ | |
614 | static struct usb_driver irda_driver = { | |
615 | .name = "kingsun-sir", | |
616 | .probe = kingsun_probe, | |
617 | .disconnect = kingsun_disconnect, | |
618 | .id_table = dongles, | |
619 | #ifdef CONFIG_PM | |
620 | .suspend = kingsun_suspend, | |
621 | .resume = kingsun_resume, | |
622 | #endif | |
623 | }; | |
624 | ||
625 | /* | |
626 | * Module insertion | |
627 | */ | |
628 | static int __init kingsun_init(void) | |
629 | { | |
630 | return usb_register(&irda_driver); | |
631 | } | |
632 | module_init(kingsun_init); | |
633 | ||
634 | /* | |
635 | * Module removal | |
636 | */ | |
637 | static void __exit kingsun_cleanup(void) | |
638 | { | |
639 | /* Deregister the driver and remove all pending instances */ | |
640 | usb_deregister(&irda_driver); | |
641 | } | |
642 | module_exit(kingsun_cleanup); | |
643 | ||
66f5e51e | 644 | MODULE_AUTHOR("Alex Villacís Lasso <a_villacis@palosanto.com>"); |
a2af421f AVL |
645 | MODULE_DESCRIPTION("IrDA-USB Dongle Driver for KingSun/DonShine"); |
646 | MODULE_LICENSE("GPL"); |