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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 */ | |
102 | static struct usb_device_id dongles[] = { | |
103 | /* KingSun Co,Ltd IrDA/USB Bridge */ | |
104 | {USB_DEVICE(KSDAZZLE_VENDOR_ID, KSDAZZLE_PRODUCT_ID)}, | |
105 | {} | |
106 | }; | |
107 | ||
108 | MODULE_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 | |
117 | struct 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 | ||
139 | struct 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 */ | |
af049081 | 143 | |
4a1d7c25 AVL |
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 */ | |
169 | static 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 */ | |
179 | static 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 */ | |
213 | static void ksdazzle_send_irq(struct urb *urb); | |
214 | static 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 */ | |
241 | static 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: | |
af049081 | 281 | netdev->stats.tx_errors++; |
4a1d7c25 AVL |
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 | */ | |
6518bbb8 SH |
301 | static netdev_tx_t ksdazzle_hard_xmit(struct sk_buff *skb, |
302 | struct net_device *netdev) | |
4a1d7c25 AVL |
303 | { |
304 | struct ksdazzle_cb *kingsun; | |
305 | unsigned int wraplen; | |
306 | int ret = 0; | |
307 | ||
4a1d7c25 AVL |
308 | netif_stop_queue(netdev); |
309 | ||
310 | /* the IRDA wrapping routines don't deal with non linear skb */ | |
311 | SKB_LINEAR_ASSERT(skb); | |
312 | ||
313 | kingsun = netdev_priv(netdev); | |
314 | ||
315 | spin_lock(&kingsun->lock); | |
316 | kingsun->new_speed = irda_get_next_speed(skb); | |
317 | ||
318 | /* Append data to the end of whatever data remains to be transmitted */ | |
319 | wraplen = | |
320 | async_wrap_skb(skb, kingsun->tx_buf_clear, KINGSUN_SND_FIFO_SIZE); | |
321 | kingsun->tx_buf_clear_used = wraplen; | |
322 | ||
323 | if ((ret = ksdazzle_submit_tx_fragment(kingsun)) != 0) { | |
324 | err("ksdazzle_hard_xmit: failed tx_urb submit: %d", ret); | |
325 | switch (ret) { | |
326 | case -ENODEV: | |
327 | case -EPIPE: | |
328 | break; | |
329 | default: | |
af049081 | 330 | netdev->stats.tx_errors++; |
4a1d7c25 AVL |
331 | netif_start_queue(netdev); |
332 | } | |
333 | } else { | |
af049081 SH |
334 | netdev->stats.tx_packets++; |
335 | netdev->stats.tx_bytes += skb->len; | |
4a1d7c25 AVL |
336 | |
337 | } | |
338 | ||
339 | dev_kfree_skb(skb); | |
340 | spin_unlock(&kingsun->lock); | |
341 | ||
4bd73ae2 | 342 | return NETDEV_TX_OK; |
4a1d7c25 AVL |
343 | } |
344 | ||
345 | /* Receive callback function */ | |
346 | static void ksdazzle_rcv_irq(struct urb *urb) | |
347 | { | |
348 | struct ksdazzle_cb *kingsun = urb->context; | |
af049081 | 349 | struct net_device *netdev = kingsun->netdev; |
4a1d7c25 AVL |
350 | |
351 | /* in process of stopping, just drop data */ | |
af049081 | 352 | if (!netif_running(netdev)) { |
4a1d7c25 AVL |
353 | kingsun->receiving = 0; |
354 | return; | |
355 | } | |
356 | ||
357 | /* unlink, shutdown, unplug, other nasties */ | |
358 | if (urb->status != 0) { | |
359 | err("ksdazzle_rcv_irq: urb asynchronously failed - %d", | |
360 | urb->status); | |
361 | kingsun->receiving = 0; | |
362 | return; | |
363 | } | |
364 | ||
365 | if (urb->actual_length > 0) { | |
366 | __u8 *bytes = urb->transfer_buffer; | |
367 | unsigned int i; | |
368 | ||
369 | for (i = 0; i < urb->actual_length; i++) { | |
af049081 | 370 | async_unwrap_char(netdev, &netdev->stats, |
4a1d7c25 AVL |
371 | &kingsun->rx_unwrap_buff, bytes[i]); |
372 | } | |
4a1d7c25 AVL |
373 | kingsun->receiving = |
374 | (kingsun->rx_unwrap_buff.state != OUTSIDE_FRAME) ? 1 : 0; | |
375 | } | |
376 | ||
377 | /* This urb has already been filled in ksdazzle_net_open. It is assumed that | |
378 | urb keeps the pointer to the payload buffer. | |
379 | */ | |
380 | urb->status = 0; | |
381 | usb_submit_urb(urb, GFP_ATOMIC); | |
382 | } | |
383 | ||
384 | /* | |
385 | * Function ksdazzle_net_open (dev) | |
386 | * | |
387 | * Network device is taken up. Usually this is done by "ifconfig irda0 up" | |
388 | */ | |
389 | static int ksdazzle_net_open(struct net_device *netdev) | |
390 | { | |
391 | struct ksdazzle_cb *kingsun = netdev_priv(netdev); | |
392 | int err = -ENOMEM; | |
393 | char hwname[16]; | |
394 | ||
395 | /* At this point, urbs are NULL, and skb is NULL (see ksdazzle_probe) */ | |
396 | kingsun->receiving = 0; | |
397 | ||
398 | /* Initialize for SIR to copy data directly into skb. */ | |
399 | kingsun->rx_unwrap_buff.in_frame = FALSE; | |
400 | kingsun->rx_unwrap_buff.state = OUTSIDE_FRAME; | |
401 | kingsun->rx_unwrap_buff.truesize = IRDA_SKB_MAX_MTU; | |
402 | kingsun->rx_unwrap_buff.skb = dev_alloc_skb(IRDA_SKB_MAX_MTU); | |
403 | if (!kingsun->rx_unwrap_buff.skb) | |
404 | goto free_mem; | |
405 | ||
406 | skb_reserve(kingsun->rx_unwrap_buff.skb, 1); | |
407 | kingsun->rx_unwrap_buff.head = kingsun->rx_unwrap_buff.skb->data; | |
408 | ||
409 | kingsun->rx_urb = usb_alloc_urb(0, GFP_KERNEL); | |
410 | if (!kingsun->rx_urb) | |
411 | goto free_mem; | |
412 | ||
413 | kingsun->tx_urb = usb_alloc_urb(0, GFP_KERNEL); | |
414 | if (!kingsun->tx_urb) | |
415 | goto free_mem; | |
416 | ||
417 | kingsun->speed_urb = usb_alloc_urb(0, GFP_KERNEL); | |
418 | if (!kingsun->speed_urb) | |
419 | goto free_mem; | |
420 | ||
421 | /* Initialize speed for dongle */ | |
422 | kingsun->new_speed = 9600; | |
423 | err = ksdazzle_change_speed(kingsun, 9600); | |
424 | if (err < 0) | |
425 | goto free_mem; | |
426 | ||
427 | /* | |
428 | * Now that everything should be initialized properly, | |
429 | * Open new IrLAP layer instance to take care of us... | |
430 | */ | |
431 | sprintf(hwname, "usb#%d", kingsun->usbdev->devnum); | |
432 | kingsun->irlap = irlap_open(netdev, &kingsun->qos, hwname); | |
433 | if (!kingsun->irlap) { | |
434 | err("ksdazzle-sir: irlap_open failed"); | |
435 | goto free_mem; | |
436 | } | |
437 | ||
438 | /* Start reception. */ | |
439 | usb_fill_int_urb(kingsun->rx_urb, kingsun->usbdev, | |
440 | usb_rcvintpipe(kingsun->usbdev, kingsun->ep_in), | |
630e4997 AVL |
441 | kingsun->rx_buf, KINGSUN_RCV_MAX, ksdazzle_rcv_irq, |
442 | kingsun, 1); | |
4a1d7c25 AVL |
443 | kingsun->rx_urb->status = 0; |
444 | err = usb_submit_urb(kingsun->rx_urb, GFP_KERNEL); | |
445 | if (err) { | |
446 | err("ksdazzle-sir: first urb-submit failed: %d", err); | |
447 | goto close_irlap; | |
448 | } | |
449 | ||
450 | netif_start_queue(netdev); | |
451 | ||
452 | /* Situation at this point: | |
453 | - all work buffers allocated | |
454 | - urbs allocated and ready to fill | |
455 | - max rx packet known (in max_rx) | |
456 | - unwrap state machine initialized, in state outside of any frame | |
457 | - receive request in progress | |
458 | - IrLAP layer started, about to hand over packets to send | |
459 | */ | |
460 | ||
461 | return 0; | |
462 | ||
463 | close_irlap: | |
464 | irlap_close(kingsun->irlap); | |
465 | free_mem: | |
466 | usb_free_urb(kingsun->speed_urb); | |
467 | kingsun->speed_urb = NULL; | |
468 | usb_free_urb(kingsun->tx_urb); | |
469 | kingsun->tx_urb = NULL; | |
470 | usb_free_urb(kingsun->rx_urb); | |
471 | kingsun->rx_urb = NULL; | |
472 | if (kingsun->rx_unwrap_buff.skb) { | |
473 | kfree_skb(kingsun->rx_unwrap_buff.skb); | |
474 | kingsun->rx_unwrap_buff.skb = NULL; | |
475 | kingsun->rx_unwrap_buff.head = NULL; | |
476 | } | |
477 | return err; | |
478 | } | |
479 | ||
480 | /* | |
481 | * Function ksdazzle_net_close (dev) | |
482 | * | |
483 | * Network device is taken down. Usually this is done by | |
484 | * "ifconfig irda0 down" | |
485 | */ | |
486 | static int ksdazzle_net_close(struct net_device *netdev) | |
487 | { | |
488 | struct ksdazzle_cb *kingsun = netdev_priv(netdev); | |
489 | ||
490 | /* Stop transmit processing */ | |
491 | netif_stop_queue(netdev); | |
492 | ||
493 | /* Mop up receive && transmit urb's */ | |
494 | usb_kill_urb(kingsun->tx_urb); | |
495 | usb_free_urb(kingsun->tx_urb); | |
496 | kingsun->tx_urb = NULL; | |
497 | ||
498 | usb_kill_urb(kingsun->speed_urb); | |
499 | usb_free_urb(kingsun->speed_urb); | |
500 | kingsun->speed_urb = NULL; | |
501 | ||
502 | usb_kill_urb(kingsun->rx_urb); | |
503 | usb_free_urb(kingsun->rx_urb); | |
504 | kingsun->rx_urb = NULL; | |
505 | ||
506 | kfree_skb(kingsun->rx_unwrap_buff.skb); | |
507 | kingsun->rx_unwrap_buff.skb = NULL; | |
508 | kingsun->rx_unwrap_buff.head = NULL; | |
509 | kingsun->rx_unwrap_buff.in_frame = FALSE; | |
510 | kingsun->rx_unwrap_buff.state = OUTSIDE_FRAME; | |
511 | kingsun->receiving = 0; | |
512 | ||
513 | /* Stop and remove instance of IrLAP */ | |
514 | irlap_close(kingsun->irlap); | |
515 | ||
516 | kingsun->irlap = NULL; | |
517 | ||
518 | return 0; | |
519 | } | |
520 | ||
521 | /* | |
522 | * IOCTLs : Extra out-of-band network commands... | |
523 | */ | |
524 | static int ksdazzle_net_ioctl(struct net_device *netdev, struct ifreq *rq, | |
525 | int cmd) | |
526 | { | |
527 | struct if_irda_req *irq = (struct if_irda_req *)rq; | |
528 | struct ksdazzle_cb *kingsun = netdev_priv(netdev); | |
529 | int ret = 0; | |
530 | ||
531 | switch (cmd) { | |
532 | case SIOCSBANDWIDTH: /* Set bandwidth */ | |
533 | if (!capable(CAP_NET_ADMIN)) | |
534 | return -EPERM; | |
535 | ||
536 | /* Check if the device is still there */ | |
537 | if (netif_device_present(kingsun->netdev)) | |
538 | return ksdazzle_change_speed(kingsun, | |
539 | irq->ifr_baudrate); | |
540 | break; | |
541 | ||
542 | case SIOCSMEDIABUSY: /* Set media busy */ | |
543 | if (!capable(CAP_NET_ADMIN)) | |
544 | return -EPERM; | |
545 | ||
546 | /* Check if the IrDA stack is still there */ | |
547 | if (netif_running(kingsun->netdev)) | |
548 | irda_device_set_media_busy(kingsun->netdev, TRUE); | |
549 | break; | |
550 | ||
551 | case SIOCGRECEIVING: | |
552 | /* Only approximately true */ | |
553 | irq->ifr_receiving = kingsun->receiving; | |
554 | break; | |
555 | ||
556 | default: | |
557 | ret = -EOPNOTSUPP; | |
558 | } | |
559 | ||
560 | return ret; | |
561 | } | |
562 | ||
0c818a62 SH |
563 | static const struct net_device_ops ksdazzle_ops = { |
564 | .ndo_start_xmit = ksdazzle_hard_xmit, | |
565 | .ndo_open = ksdazzle_net_open, | |
566 | .ndo_stop = ksdazzle_net_close, | |
567 | .ndo_do_ioctl = ksdazzle_net_ioctl, | |
568 | }; | |
569 | ||
4a1d7c25 AVL |
570 | /* |
571 | * This routine is called by the USB subsystem for each new device | |
572 | * in the system. We need to check if the device is ours, and in | |
573 | * this case start handling it. | |
574 | */ | |
575 | static int ksdazzle_probe(struct usb_interface *intf, | |
576 | const struct usb_device_id *id) | |
577 | { | |
578 | struct usb_host_interface *interface; | |
579 | struct usb_endpoint_descriptor *endpoint; | |
580 | ||
581 | struct usb_device *dev = interface_to_usbdev(intf); | |
582 | struct ksdazzle_cb *kingsun = NULL; | |
583 | struct net_device *net = NULL; | |
584 | int ret = -ENOMEM; | |
585 | int pipe, maxp_in, maxp_out; | |
586 | __u8 ep_in; | |
587 | __u8 ep_out; | |
588 | ||
589 | /* Check that there really are two interrupt endpoints. Check based on the | |
590 | one in drivers/usb/input/usbmouse.c | |
591 | */ | |
592 | interface = intf->cur_altsetting; | |
593 | if (interface->desc.bNumEndpoints != 2) { | |
594 | err("ksdazzle: expected 2 endpoints, found %d", | |
595 | interface->desc.bNumEndpoints); | |
596 | return -ENODEV; | |
597 | } | |
598 | endpoint = &interface->endpoint[KINGSUN_EP_IN].desc; | |
599 | if (!usb_endpoint_is_int_in(endpoint)) { | |
600 | err("ksdazzle: endpoint 0 is not interrupt IN"); | |
601 | return -ENODEV; | |
602 | } | |
603 | ||
604 | ep_in = endpoint->bEndpointAddress; | |
605 | pipe = usb_rcvintpipe(dev, ep_in); | |
606 | maxp_in = usb_maxpacket(dev, pipe, usb_pipeout(pipe)); | |
607 | if (maxp_in > 255 || maxp_in <= 1) { | |
608 | err("ksdazzle: endpoint 0 has max packet size %d not in range [2..255]", maxp_in); | |
609 | return -ENODEV; | |
610 | } | |
611 | ||
612 | endpoint = &interface->endpoint[KINGSUN_EP_OUT].desc; | |
613 | if (!usb_endpoint_is_int_out(endpoint)) { | |
614 | err("ksdazzle: endpoint 1 is not interrupt OUT"); | |
615 | return -ENODEV; | |
616 | } | |
617 | ||
618 | ep_out = endpoint->bEndpointAddress; | |
619 | pipe = usb_sndintpipe(dev, ep_out); | |
620 | maxp_out = usb_maxpacket(dev, pipe, usb_pipeout(pipe)); | |
621 | ||
622 | /* Allocate network device container. */ | |
623 | net = alloc_irdadev(sizeof(*kingsun)); | |
624 | if (!net) | |
625 | goto err_out1; | |
626 | ||
4a1d7c25 AVL |
627 | SET_NETDEV_DEV(net, &intf->dev); |
628 | kingsun = netdev_priv(net); | |
629 | kingsun->netdev = net; | |
630 | kingsun->usbdev = dev; | |
631 | kingsun->ep_in = ep_in; | |
632 | kingsun->ep_out = ep_out; | |
633 | kingsun->irlap = NULL; | |
634 | kingsun->tx_urb = NULL; | |
635 | kingsun->tx_buf_clear = NULL; | |
636 | kingsun->tx_buf_clear_used = 0; | |
637 | kingsun->tx_buf_clear_sent = 0; | |
638 | ||
639 | kingsun->rx_urb = NULL; | |
630e4997 | 640 | kingsun->rx_buf = NULL; |
4a1d7c25 AVL |
641 | kingsun->rx_unwrap_buff.in_frame = FALSE; |
642 | kingsun->rx_unwrap_buff.state = OUTSIDE_FRAME; | |
643 | kingsun->rx_unwrap_buff.skb = NULL; | |
644 | kingsun->receiving = 0; | |
645 | spin_lock_init(&kingsun->lock); | |
646 | ||
647 | kingsun->speed_setuprequest = NULL; | |
648 | kingsun->speed_urb = NULL; | |
649 | kingsun->speedparams.baudrate = 0; | |
650 | ||
630e4997 AVL |
651 | /* Allocate input buffer */ |
652 | kingsun->rx_buf = kmalloc(KINGSUN_RCV_MAX, GFP_KERNEL); | |
653 | if (!kingsun->rx_buf) | |
654 | goto free_mem; | |
655 | ||
4a1d7c25 AVL |
656 | /* Allocate output buffer */ |
657 | kingsun->tx_buf_clear = kmalloc(KINGSUN_SND_FIFO_SIZE, GFP_KERNEL); | |
658 | if (!kingsun->tx_buf_clear) | |
659 | goto free_mem; | |
660 | ||
661 | /* Allocate and initialize speed setup packet */ | |
662 | kingsun->speed_setuprequest = | |
663 | kmalloc(sizeof(struct usb_ctrlrequest), GFP_KERNEL); | |
664 | if (!kingsun->speed_setuprequest) | |
665 | goto free_mem; | |
666 | kingsun->speed_setuprequest->bRequestType = | |
667 | USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE; | |
668 | kingsun->speed_setuprequest->bRequest = KINGSUN_REQ_SEND; | |
669 | kingsun->speed_setuprequest->wValue = cpu_to_le16(0x0200); | |
670 | kingsun->speed_setuprequest->wIndex = cpu_to_le16(0x0001); | |
671 | kingsun->speed_setuprequest->wLength = | |
672 | cpu_to_le16(sizeof(struct ksdazzle_speedparams)); | |
673 | ||
674 | printk(KERN_INFO "KingSun/Dazzle IRDA/USB found at address %d, " | |
675 | "Vendor: %x, Product: %x\n", | |
676 | dev->devnum, le16_to_cpu(dev->descriptor.idVendor), | |
677 | le16_to_cpu(dev->descriptor.idProduct)); | |
678 | ||
679 | /* Initialize QoS for this device */ | |
680 | irda_init_max_qos_capabilies(&kingsun->qos); | |
681 | ||
682 | /* Baud rates known to be supported. Please uncomment if devices (other | |
683 | than a SonyEriccson K300 phone) can be shown to support higher speeds | |
684 | with this dongle. | |
685 | */ | |
686 | kingsun->qos.baud_rate.bits = | |
687 | IR_2400 | IR_9600 | IR_19200 | IR_38400 | IR_57600 | IR_115200; | |
688 | kingsun->qos.min_turn_time.bits &= KINGSUN_MTT; | |
689 | irda_qos_bits_to_value(&kingsun->qos); | |
690 | ||
691 | /* Override the network functions we need to use */ | |
0c818a62 | 692 | net->netdev_ops = &ksdazzle_ops; |
4a1d7c25 AVL |
693 | |
694 | ret = register_netdev(net); | |
695 | if (ret != 0) | |
696 | goto free_mem; | |
697 | ||
880c9c66 GKH |
698 | dev_info(&net->dev, "IrDA: Registered KingSun/Dazzle device %s\n", |
699 | net->name); | |
4a1d7c25 AVL |
700 | |
701 | usb_set_intfdata(intf, kingsun); | |
702 | ||
703 | /* Situation at this point: | |
704 | - all work buffers allocated | |
705 | - setup requests pre-filled | |
706 | - urbs not allocated, set to NULL | |
707 | - max rx packet known (is KINGSUN_FIFO_SIZE) | |
708 | - unwrap state machine (partially) initialized, but skb == NULL | |
709 | */ | |
710 | ||
711 | return 0; | |
712 | ||
713 | free_mem: | |
714 | kfree(kingsun->speed_setuprequest); | |
715 | kfree(kingsun->tx_buf_clear); | |
630e4997 | 716 | kfree(kingsun->rx_buf); |
4a1d7c25 AVL |
717 | free_netdev(net); |
718 | err_out1: | |
719 | return ret; | |
720 | } | |
721 | ||
722 | /* | |
723 | * The current device is removed, the USB layer tell us to shut it down... | |
724 | */ | |
725 | static void ksdazzle_disconnect(struct usb_interface *intf) | |
726 | { | |
727 | struct ksdazzle_cb *kingsun = usb_get_intfdata(intf); | |
728 | ||
729 | if (!kingsun) | |
730 | return; | |
731 | ||
732 | unregister_netdev(kingsun->netdev); | |
733 | ||
734 | /* Mop up receive && transmit urb's */ | |
735 | usb_kill_urb(kingsun->speed_urb); | |
736 | usb_free_urb(kingsun->speed_urb); | |
737 | kingsun->speed_urb = NULL; | |
738 | ||
739 | usb_kill_urb(kingsun->tx_urb); | |
740 | usb_free_urb(kingsun->tx_urb); | |
741 | kingsun->tx_urb = NULL; | |
742 | ||
743 | usb_kill_urb(kingsun->rx_urb); | |
744 | usb_free_urb(kingsun->rx_urb); | |
745 | kingsun->rx_urb = NULL; | |
746 | ||
747 | kfree(kingsun->speed_setuprequest); | |
748 | kfree(kingsun->tx_buf_clear); | |
630e4997 | 749 | kfree(kingsun->rx_buf); |
4a1d7c25 AVL |
750 | free_netdev(kingsun->netdev); |
751 | ||
752 | usb_set_intfdata(intf, NULL); | |
753 | } | |
754 | ||
755 | #ifdef CONFIG_PM | |
756 | /* USB suspend, so power off the transmitter/receiver */ | |
757 | static int ksdazzle_suspend(struct usb_interface *intf, pm_message_t message) | |
758 | { | |
759 | struct ksdazzle_cb *kingsun = usb_get_intfdata(intf); | |
760 | ||
761 | netif_device_detach(kingsun->netdev); | |
762 | if (kingsun->speed_urb != NULL) | |
763 | usb_kill_urb(kingsun->speed_urb); | |
764 | if (kingsun->tx_urb != NULL) | |
765 | usb_kill_urb(kingsun->tx_urb); | |
766 | if (kingsun->rx_urb != NULL) | |
767 | usb_kill_urb(kingsun->rx_urb); | |
768 | return 0; | |
769 | } | |
770 | ||
771 | /* Coming out of suspend, so reset hardware */ | |
772 | static int ksdazzle_resume(struct usb_interface *intf) | |
773 | { | |
774 | struct ksdazzle_cb *kingsun = usb_get_intfdata(intf); | |
775 | ||
776 | if (kingsun->rx_urb != NULL) { | |
777 | /* Setup request already filled in ksdazzle_probe */ | |
778 | usb_submit_urb(kingsun->rx_urb, GFP_KERNEL); | |
779 | } | |
780 | netif_device_attach(kingsun->netdev); | |
781 | ||
782 | return 0; | |
783 | } | |
784 | #endif | |
785 | ||
786 | /* | |
787 | * USB device callbacks | |
788 | */ | |
789 | static struct usb_driver irda_driver = { | |
790 | .name = "ksdazzle-sir", | |
791 | .probe = ksdazzle_probe, | |
792 | .disconnect = ksdazzle_disconnect, | |
793 | .id_table = dongles, | |
794 | #ifdef CONFIG_PM | |
795 | .suspend = ksdazzle_suspend, | |
796 | .resume = ksdazzle_resume, | |
797 | #endif | |
798 | }; | |
799 | ||
800 | /* | |
801 | * Module insertion | |
802 | */ | |
803 | static int __init ksdazzle_init(void) | |
804 | { | |
805 | return usb_register(&irda_driver); | |
806 | } | |
807 | ||
808 | module_init(ksdazzle_init); | |
809 | ||
810 | /* | |
811 | * Module removal | |
812 | */ | |
813 | static void __exit ksdazzle_cleanup(void) | |
814 | { | |
815 | /* Deregister the driver and remove all pending instances */ | |
816 | usb_deregister(&irda_driver); | |
817 | } | |
818 | ||
819 | module_exit(ksdazzle_cleanup); | |
820 | ||
821 | MODULE_AUTHOR("Alex Villacís Lasso <a_villacis@palosanto.com>"); | |
822 | MODULE_DESCRIPTION("IrDA-USB Dongle Driver for KingSun Dazzle"); | |
823 | MODULE_LICENSE("GPL"); |