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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> | |
a2af421f | 67 | #include <linux/slab.h> |
a2af421f AVL |
68 | #include <linux/usb.h> |
69 | #include <linux/device.h> | |
70 | #include <linux/crc32.h> | |
71 | ||
72 | #include <asm/unaligned.h> | |
73 | #include <asm/byteorder.h> | |
74 | #include <asm/uaccess.h> | |
75 | ||
76 | #include <net/irda/irda.h> | |
77 | #include <net/irda/wrapper.h> | |
78 | #include <net/irda/crc.h> | |
79 | ||
80 | /* | |
81 | * According to lsusb, 0x07c0 is assigned to | |
82 | * "Code Mercenaries Hard- und Software GmbH" | |
83 | */ | |
84 | #define KING_VENDOR_ID 0x07c0 | |
85 | #define KING_PRODUCT_ID 0x4200 | |
86 | ||
87 | /* These are the currently known USB ids */ | |
88 | static struct usb_device_id dongles[] = { | |
89 | /* KingSun Co,Ltd IrDA/USB Bridge */ | |
90 | { USB_DEVICE(KING_VENDOR_ID, KING_PRODUCT_ID) }, | |
91 | { } | |
92 | }; | |
93 | ||
94 | MODULE_DEVICE_TABLE(usb, dongles); | |
95 | ||
96 | #define KINGSUN_MTT 0x07 | |
97 | ||
98 | #define KINGSUN_FIFO_SIZE 4096 | |
99 | #define KINGSUN_EP_IN 0 | |
100 | #define KINGSUN_EP_OUT 1 | |
101 | ||
102 | struct kingsun_cb { | |
103 | struct usb_device *usbdev; /* init: probe_irda */ | |
104 | struct net_device *netdev; /* network layer */ | |
105 | struct irlap_cb *irlap; /* The link layer we are binded to */ | |
af049081 | 106 | |
a2af421f AVL |
107 | struct qos_info qos; |
108 | ||
109 | __u8 *in_buf; /* receive buffer */ | |
110 | __u8 *out_buf; /* transmit buffer */ | |
111 | __u8 max_rx; /* max. atomic read from dongle | |
112 | (usually 8), also size of in_buf */ | |
113 | __u8 max_tx; /* max. atomic write to dongle | |
114 | (usually 8) */ | |
115 | ||
116 | iobuff_t rx_buff; /* receive unwrap state machine */ | |
117 | struct timeval rx_time; | |
118 | spinlock_t lock; | |
119 | int receiving; | |
120 | ||
121 | __u8 ep_in; | |
122 | __u8 ep_out; | |
123 | ||
124 | struct urb *tx_urb; | |
125 | struct urb *rx_urb; | |
126 | }; | |
127 | ||
128 | /* Callback transmission routine */ | |
129 | static void kingsun_send_irq(struct urb *urb) | |
130 | { | |
131 | struct kingsun_cb *kingsun = urb->context; | |
132 | struct net_device *netdev = kingsun->netdev; | |
133 | ||
134 | /* in process of stopping, just drop data */ | |
135 | if (!netif_running(kingsun->netdev)) { | |
6f0d27ff GKH |
136 | dev_err(&kingsun->usbdev->dev, |
137 | "kingsun_send_irq: Network not running!\n"); | |
a2af421f AVL |
138 | return; |
139 | } | |
140 | ||
141 | /* unlink, shutdown, unplug, other nasties */ | |
142 | if (urb->status != 0) { | |
6f0d27ff GKH |
143 | dev_err(&kingsun->usbdev->dev, |
144 | "kingsun_send_irq: urb asynchronously failed - %d\n", | |
145 | urb->status); | |
a2af421f AVL |
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))) { | |
6f0d27ff GKH |
181 | dev_err(&kingsun->usbdev->dev, |
182 | "kingsun_hard_xmit: failed tx_urb submit: %d\n", ret); | |
a2af421f AVL |
183 | switch (ret) { |
184 | case -ENODEV: | |
185 | case -EPIPE: | |
186 | break; | |
187 | default: | |
af049081 | 188 | netdev->stats.tx_errors++; |
a2af421f AVL |
189 | netif_start_queue(netdev); |
190 | } | |
191 | } else { | |
af049081 SH |
192 | netdev->stats.tx_packets++; |
193 | netdev->stats.tx_bytes += skb->len; | |
a2af421f AVL |
194 | } |
195 | ||
196 | dev_kfree_skb(skb); | |
197 | spin_unlock(&kingsun->lock); | |
198 | ||
4bd73ae2 | 199 | return NETDEV_TX_OK; |
a2af421f AVL |
200 | } |
201 | ||
202 | /* Receive callback function */ | |
203 | static void kingsun_rcv_irq(struct urb *urb) | |
204 | { | |
205 | struct kingsun_cb *kingsun = urb->context; | |
206 | int ret; | |
207 | ||
208 | /* in process of stopping, just drop data */ | |
209 | if (!netif_running(kingsun->netdev)) { | |
210 | kingsun->receiving = 0; | |
211 | return; | |
212 | } | |
213 | ||
214 | /* unlink, shutdown, unplug, other nasties */ | |
215 | if (urb->status != 0) { | |
6f0d27ff GKH |
216 | dev_err(&kingsun->usbdev->dev, |
217 | "kingsun_rcv_irq: urb asynchronously failed - %d\n", | |
218 | urb->status); | |
a2af421f AVL |
219 | kingsun->receiving = 0; |
220 | return; | |
221 | } | |
222 | ||
223 | if (urb->actual_length == kingsun->max_rx) { | |
224 | __u8 *bytes = urb->transfer_buffer; | |
225 | int i; | |
226 | ||
227 | /* The very first byte in the buffer indicates the length of | |
228 | valid data in the read. This byte must be in the range | |
229 | 1..kingsun->max_rx -1 . Values outside this range indicate | |
230 | an uninitialized Rx buffer when the dongle has just been | |
231 | plugged in. */ | |
232 | if (bytes[0] >= 1 && bytes[0] < kingsun->max_rx) { | |
233 | for (i = 1; i <= bytes[0]; i++) { | |
234 | async_unwrap_char(kingsun->netdev, | |
af049081 | 235 | &kingsun->netdev->stats, |
a2af421f AVL |
236 | &kingsun->rx_buff, bytes[i]); |
237 | } | |
a2af421f AVL |
238 | do_gettimeofday(&kingsun->rx_time); |
239 | kingsun->receiving = | |
240 | (kingsun->rx_buff.state != OUTSIDE_FRAME) | |
241 | ? 1 : 0; | |
242 | } | |
243 | } else if (urb->actual_length > 0) { | |
6f0d27ff GKH |
244 | dev_err(&kingsun->usbdev->dev, |
245 | "%s(): Unexpected response length, expected %d got %d\n", | |
246 | __func__, kingsun->max_rx, urb->actual_length); | |
a2af421f AVL |
247 | } |
248 | /* This urb has already been filled in kingsun_net_open */ | |
249 | ret = usb_submit_urb(urb, GFP_ATOMIC); | |
250 | } | |
251 | ||
252 | /* | |
253 | * Function kingsun_net_open (dev) | |
254 | * | |
255 | * Network device is taken up. Usually this is done by "ifconfig irda0 up" | |
256 | */ | |
257 | static int kingsun_net_open(struct net_device *netdev) | |
258 | { | |
259 | struct kingsun_cb *kingsun = netdev_priv(netdev); | |
260 | int err = -ENOMEM; | |
261 | char hwname[16]; | |
262 | ||
263 | /* At this point, urbs are NULL, and skb is NULL (see kingsun_probe) */ | |
264 | kingsun->receiving = 0; | |
265 | ||
266 | /* Initialize for SIR to copy data directly into skb. */ | |
267 | kingsun->rx_buff.in_frame = FALSE; | |
268 | kingsun->rx_buff.state = OUTSIDE_FRAME; | |
269 | kingsun->rx_buff.truesize = IRDA_SKB_MAX_MTU; | |
270 | kingsun->rx_buff.skb = dev_alloc_skb(IRDA_SKB_MAX_MTU); | |
271 | if (!kingsun->rx_buff.skb) | |
272 | goto free_mem; | |
273 | ||
274 | skb_reserve(kingsun->rx_buff.skb, 1); | |
275 | kingsun->rx_buff.head = kingsun->rx_buff.skb->data; | |
276 | do_gettimeofday(&kingsun->rx_time); | |
277 | ||
278 | kingsun->rx_urb = usb_alloc_urb(0, GFP_KERNEL); | |
279 | if (!kingsun->rx_urb) | |
280 | goto free_mem; | |
281 | ||
282 | kingsun->tx_urb = usb_alloc_urb(0, GFP_KERNEL); | |
283 | if (!kingsun->tx_urb) | |
284 | goto free_mem; | |
285 | ||
286 | /* | |
287 | * Now that everything should be initialized properly, | |
288 | * Open new IrLAP layer instance to take care of us... | |
289 | */ | |
290 | sprintf(hwname, "usb#%d", kingsun->usbdev->devnum); | |
291 | kingsun->irlap = irlap_open(netdev, &kingsun->qos, hwname); | |
292 | if (!kingsun->irlap) { | |
6f0d27ff | 293 | dev_err(&kingsun->usbdev->dev, "irlap_open failed\n"); |
a2af421f AVL |
294 | goto free_mem; |
295 | } | |
296 | ||
297 | /* Start first reception */ | |
298 | usb_fill_int_urb(kingsun->rx_urb, kingsun->usbdev, | |
299 | usb_rcvintpipe(kingsun->usbdev, kingsun->ep_in), | |
300 | kingsun->in_buf, kingsun->max_rx, | |
301 | kingsun_rcv_irq, kingsun, 1); | |
302 | kingsun->rx_urb->status = 0; | |
303 | err = usb_submit_urb(kingsun->rx_urb, GFP_KERNEL); | |
304 | if (err) { | |
6f0d27ff GKH |
305 | dev_err(&kingsun->usbdev->dev, |
306 | "first urb-submit failed: %d\n", err); | |
a2af421f AVL |
307 | goto close_irlap; |
308 | } | |
309 | ||
310 | netif_start_queue(netdev); | |
311 | ||
312 | /* Situation at this point: | |
313 | - all work buffers allocated | |
314 | - urbs allocated and ready to fill | |
315 | - max rx packet known (in max_rx) | |
316 | - unwrap state machine initialized, in state outside of any frame | |
317 | - receive request in progress | |
318 | - IrLAP layer started, about to hand over packets to send | |
319 | */ | |
320 | ||
321 | return 0; | |
322 | ||
323 | close_irlap: | |
324 | irlap_close(kingsun->irlap); | |
325 | free_mem: | |
326 | if (kingsun->tx_urb) { | |
327 | usb_free_urb(kingsun->tx_urb); | |
328 | kingsun->tx_urb = NULL; | |
329 | } | |
330 | if (kingsun->rx_urb) { | |
331 | usb_free_urb(kingsun->rx_urb); | |
332 | kingsun->rx_urb = NULL; | |
333 | } | |
334 | if (kingsun->rx_buff.skb) { | |
335 | kfree_skb(kingsun->rx_buff.skb); | |
336 | kingsun->rx_buff.skb = NULL; | |
337 | kingsun->rx_buff.head = NULL; | |
338 | } | |
339 | return err; | |
340 | } | |
341 | ||
342 | /* | |
343 | * Function kingsun_net_close (kingsun) | |
344 | * | |
345 | * Network device is taken down. Usually this is done by | |
346 | * "ifconfig irda0 down" | |
347 | */ | |
348 | static int kingsun_net_close(struct net_device *netdev) | |
349 | { | |
350 | struct kingsun_cb *kingsun = netdev_priv(netdev); | |
351 | ||
352 | /* Stop transmit processing */ | |
353 | netif_stop_queue(netdev); | |
354 | ||
355 | /* Mop up receive && transmit urb's */ | |
356 | usb_kill_urb(kingsun->tx_urb); | |
357 | usb_kill_urb(kingsun->rx_urb); | |
358 | ||
359 | usb_free_urb(kingsun->tx_urb); | |
360 | usb_free_urb(kingsun->rx_urb); | |
361 | ||
362 | kingsun->tx_urb = NULL; | |
363 | kingsun->rx_urb = NULL; | |
364 | ||
365 | kfree_skb(kingsun->rx_buff.skb); | |
366 | kingsun->rx_buff.skb = NULL; | |
367 | kingsun->rx_buff.head = NULL; | |
368 | kingsun->rx_buff.in_frame = FALSE; | |
369 | kingsun->rx_buff.state = OUTSIDE_FRAME; | |
370 | kingsun->receiving = 0; | |
371 | ||
372 | /* Stop and remove instance of IrLAP */ | |
373 | if (kingsun->irlap) | |
374 | irlap_close(kingsun->irlap); | |
375 | ||
376 | kingsun->irlap = NULL; | |
377 | ||
378 | return 0; | |
379 | } | |
380 | ||
381 | /* | |
382 | * IOCTLs : Extra out-of-band network commands... | |
383 | */ | |
384 | static int kingsun_net_ioctl(struct net_device *netdev, struct ifreq *rq, | |
385 | int cmd) | |
386 | { | |
387 | struct if_irda_req *irq = (struct if_irda_req *) rq; | |
388 | struct kingsun_cb *kingsun = netdev_priv(netdev); | |
389 | int ret = 0; | |
390 | ||
391 | switch (cmd) { | |
392 | case SIOCSBANDWIDTH: /* Set bandwidth */ | |
393 | if (!capable(CAP_NET_ADMIN)) | |
394 | return -EPERM; | |
395 | ||
396 | /* Check if the device is still there */ | |
397 | if (netif_device_present(kingsun->netdev)) | |
398 | /* No observed commands for speed change */ | |
399 | ret = -EOPNOTSUPP; | |
400 | break; | |
401 | ||
402 | case SIOCSMEDIABUSY: /* Set media busy */ | |
403 | if (!capable(CAP_NET_ADMIN)) | |
404 | return -EPERM; | |
405 | ||
406 | /* Check if the IrDA stack is still there */ | |
407 | if (netif_running(kingsun->netdev)) | |
408 | irda_device_set_media_busy(kingsun->netdev, TRUE); | |
409 | break; | |
410 | ||
411 | case SIOCGRECEIVING: | |
412 | /* Only approximately true */ | |
413 | irq->ifr_receiving = kingsun->receiving; | |
414 | break; | |
415 | ||
416 | default: | |
417 | ret = -EOPNOTSUPP; | |
418 | } | |
419 | ||
420 | return ret; | |
421 | } | |
422 | ||
9b634007 | 423 | static const struct net_device_ops kingsun_ops = { |
6518bbb8 | 424 | .ndo_start_xmit = kingsun_hard_xmit, |
9b634007 SH |
425 | .ndo_open = kingsun_net_open, |
426 | .ndo_stop = kingsun_net_close, | |
427 | .ndo_do_ioctl = kingsun_net_ioctl, | |
428 | }; | |
a2af421f AVL |
429 | |
430 | /* | |
431 | * This routine is called by the USB subsystem for each new device | |
432 | * in the system. We need to check if the device is ours, and in | |
433 | * this case start handling it. | |
434 | */ | |
435 | static int kingsun_probe(struct usb_interface *intf, | |
436 | const struct usb_device_id *id) | |
437 | { | |
438 | struct usb_host_interface *interface; | |
439 | struct usb_endpoint_descriptor *endpoint; | |
440 | ||
441 | struct usb_device *dev = interface_to_usbdev(intf); | |
442 | struct kingsun_cb *kingsun = NULL; | |
443 | struct net_device *net = NULL; | |
444 | int ret = -ENOMEM; | |
445 | int pipe, maxp_in, maxp_out; | |
446 | __u8 ep_in; | |
447 | __u8 ep_out; | |
448 | ||
449 | /* Check that there really are two interrupt endpoints. | |
450 | Check based on the one in drivers/usb/input/usbmouse.c | |
451 | */ | |
452 | interface = intf->cur_altsetting; | |
453 | if (interface->desc.bNumEndpoints != 2) { | |
6f0d27ff GKH |
454 | dev_err(&intf->dev, |
455 | "kingsun-sir: expected 2 endpoints, found %d\n", | |
456 | interface->desc.bNumEndpoints); | |
a2af421f AVL |
457 | return -ENODEV; |
458 | } | |
459 | endpoint = &interface->endpoint[KINGSUN_EP_IN].desc; | |
460 | if (!usb_endpoint_is_int_in(endpoint)) { | |
6f0d27ff GKH |
461 | dev_err(&intf->dev, |
462 | "kingsun-sir: endpoint 0 is not interrupt IN\n"); | |
a2af421f AVL |
463 | return -ENODEV; |
464 | } | |
465 | ||
466 | ep_in = endpoint->bEndpointAddress; | |
467 | pipe = usb_rcvintpipe(dev, ep_in); | |
468 | maxp_in = usb_maxpacket(dev, pipe, usb_pipeout(pipe)); | |
469 | if (maxp_in > 255 || maxp_in <= 1) { | |
6f0d27ff GKH |
470 | dev_err(&intf->dev, |
471 | "endpoint 0 has max packet size %d not in range\n", | |
472 | maxp_in); | |
a2af421f AVL |
473 | return -ENODEV; |
474 | } | |
475 | ||
476 | endpoint = &interface->endpoint[KINGSUN_EP_OUT].desc; | |
477 | if (!usb_endpoint_is_int_out(endpoint)) { | |
6f0d27ff GKH |
478 | dev_err(&intf->dev, |
479 | "kingsun-sir: endpoint 1 is not interrupt OUT\n"); | |
a2af421f AVL |
480 | return -ENODEV; |
481 | } | |
482 | ||
483 | ep_out = endpoint->bEndpointAddress; | |
484 | pipe = usb_sndintpipe(dev, ep_out); | |
485 | maxp_out = usb_maxpacket(dev, pipe, usb_pipeout(pipe)); | |
486 | ||
487 | /* Allocate network device container. */ | |
488 | net = alloc_irdadev(sizeof(*kingsun)); | |
489 | if(!net) | |
490 | goto err_out1; | |
491 | ||
a2af421f AVL |
492 | SET_NETDEV_DEV(net, &intf->dev); |
493 | kingsun = netdev_priv(net); | |
494 | kingsun->irlap = NULL; | |
495 | kingsun->tx_urb = NULL; | |
496 | kingsun->rx_urb = NULL; | |
497 | kingsun->ep_in = ep_in; | |
498 | kingsun->ep_out = ep_out; | |
499 | kingsun->in_buf = NULL; | |
500 | kingsun->out_buf = NULL; | |
501 | kingsun->max_rx = (__u8)maxp_in; | |
502 | kingsun->max_tx = (__u8)maxp_out; | |
503 | kingsun->netdev = net; | |
504 | kingsun->usbdev = dev; | |
505 | kingsun->rx_buff.in_frame = FALSE; | |
506 | kingsun->rx_buff.state = OUTSIDE_FRAME; | |
507 | kingsun->rx_buff.skb = NULL; | |
508 | kingsun->receiving = 0; | |
509 | spin_lock_init(&kingsun->lock); | |
510 | ||
511 | /* Allocate input buffer */ | |
901ded25 | 512 | kingsun->in_buf = kmalloc(kingsun->max_rx, GFP_KERNEL); |
a2af421f AVL |
513 | if (!kingsun->in_buf) |
514 | goto free_mem; | |
515 | ||
516 | /* Allocate output buffer */ | |
901ded25 | 517 | kingsun->out_buf = kmalloc(KINGSUN_FIFO_SIZE, GFP_KERNEL); |
a2af421f AVL |
518 | if (!kingsun->out_buf) |
519 | goto free_mem; | |
520 | ||
521 | printk(KERN_INFO "KingSun/DonShine IRDA/USB found at address %d, " | |
522 | "Vendor: %x, Product: %x\n", | |
523 | dev->devnum, le16_to_cpu(dev->descriptor.idVendor), | |
524 | le16_to_cpu(dev->descriptor.idProduct)); | |
525 | ||
526 | /* Initialize QoS for this device */ | |
527 | irda_init_max_qos_capabilies(&kingsun->qos); | |
528 | ||
529 | /* That's the Rx capability. */ | |
530 | kingsun->qos.baud_rate.bits &= IR_9600; | |
531 | kingsun->qos.min_turn_time.bits &= KINGSUN_MTT; | |
532 | irda_qos_bits_to_value(&kingsun->qos); | |
533 | ||
534 | /* Override the network functions we need to use */ | |
9b634007 | 535 | net->netdev_ops = &kingsun_ops; |
a2af421f AVL |
536 | |
537 | ret = register_netdev(net); | |
538 | if (ret != 0) | |
539 | goto free_mem; | |
540 | ||
880c9c66 GKH |
541 | dev_info(&net->dev, "IrDA: Registered KingSun/DonShine device %s\n", |
542 | net->name); | |
a2af421f AVL |
543 | |
544 | usb_set_intfdata(intf, kingsun); | |
545 | ||
546 | /* Situation at this point: | |
547 | - all work buffers allocated | |
548 | - urbs not allocated, set to NULL | |
549 | - max rx packet known (in max_rx) | |
550 | - unwrap state machine (partially) initialized, but skb == NULL | |
551 | */ | |
552 | ||
553 | return 0; | |
554 | ||
555 | free_mem: | |
44f71cef FF |
556 | kfree(kingsun->out_buf); |
557 | kfree(kingsun->in_buf); | |
a2af421f AVL |
558 | free_netdev(net); |
559 | err_out1: | |
560 | return ret; | |
561 | } | |
562 | ||
563 | /* | |
564 | * The current device is removed, the USB layer tell us to shut it down... | |
565 | */ | |
566 | static void kingsun_disconnect(struct usb_interface *intf) | |
567 | { | |
568 | struct kingsun_cb *kingsun = usb_get_intfdata(intf); | |
569 | ||
570 | if (!kingsun) | |
571 | return; | |
572 | ||
573 | unregister_netdev(kingsun->netdev); | |
574 | ||
575 | /* Mop up receive && transmit urb's */ | |
576 | if (kingsun->tx_urb != NULL) { | |
577 | usb_kill_urb(kingsun->tx_urb); | |
578 | usb_free_urb(kingsun->tx_urb); | |
579 | kingsun->tx_urb = NULL; | |
580 | } | |
581 | if (kingsun->rx_urb != NULL) { | |
582 | usb_kill_urb(kingsun->rx_urb); | |
583 | usb_free_urb(kingsun->rx_urb); | |
584 | kingsun->rx_urb = NULL; | |
585 | } | |
586 | ||
587 | kfree(kingsun->out_buf); | |
588 | kfree(kingsun->in_buf); | |
589 | free_netdev(kingsun->netdev); | |
590 | ||
591 | usb_set_intfdata(intf, NULL); | |
592 | } | |
593 | ||
594 | #ifdef CONFIG_PM | |
595 | /* USB suspend, so power off the transmitter/receiver */ | |
596 | static int kingsun_suspend(struct usb_interface *intf, pm_message_t message) | |
597 | { | |
598 | struct kingsun_cb *kingsun = usb_get_intfdata(intf); | |
599 | ||
600 | netif_device_detach(kingsun->netdev); | |
601 | if (kingsun->tx_urb != NULL) usb_kill_urb(kingsun->tx_urb); | |
602 | if (kingsun->rx_urb != NULL) usb_kill_urb(kingsun->rx_urb); | |
603 | return 0; | |
604 | } | |
605 | ||
606 | /* Coming out of suspend, so reset hardware */ | |
607 | static int kingsun_resume(struct usb_interface *intf) | |
608 | { | |
609 | struct kingsun_cb *kingsun = usb_get_intfdata(intf); | |
610 | ||
611 | if (kingsun->rx_urb != NULL) | |
612 | usb_submit_urb(kingsun->rx_urb, GFP_KERNEL); | |
613 | netif_device_attach(kingsun->netdev); | |
614 | ||
615 | return 0; | |
616 | } | |
617 | #endif | |
618 | ||
619 | /* | |
620 | * USB device callbacks | |
621 | */ | |
622 | static struct usb_driver irda_driver = { | |
623 | .name = "kingsun-sir", | |
624 | .probe = kingsun_probe, | |
625 | .disconnect = kingsun_disconnect, | |
626 | .id_table = dongles, | |
627 | #ifdef CONFIG_PM | |
628 | .suspend = kingsun_suspend, | |
629 | .resume = kingsun_resume, | |
630 | #endif | |
631 | }; | |
632 | ||
d632eb1b | 633 | module_usb_driver(irda_driver); |
a2af421f | 634 | |
66f5e51e | 635 | MODULE_AUTHOR("Alex Villacís Lasso <a_villacis@palosanto.com>"); |
a2af421f AVL |
636 | MODULE_DESCRIPTION("IrDA-USB Dongle Driver for KingSun/DonShine"); |
637 | MODULE_LICENSE("GPL"); |