Commit | Line | Data |
---|---|---|
c6ae522e SO |
1 | /***************************************************************************** |
2 | * | |
3 | * Filename: mcs7780.c | |
4 | * Version: 0.4-alpha | |
5 | * Description: Irda MosChip USB Dongle Driver | |
6 | * Authors: Lukasz Stelmach <stlman@poczta.fm> | |
7 | * Brian Pugh <bpugh@cs.pdx.edu> | |
8 | * Judy Fischbach <jfisch@cs.pdx.edu> | |
9 | * | |
10 | * Based on stir4200 driver, but some things done differently. | |
11 | * Based on earlier driver by Paul Stewart <stewart@parc.com> | |
12 | * | |
13 | * Copyright (C) 2000, Roman Weissgaerber <weissg@vienna.at> | |
14 | * Copyright (C) 2001, Dag Brattli <dag@brattli.net> | |
15 | * Copyright (C) 2001, Jean Tourrilhes <jt@hpl.hp.com> | |
16 | * Copyright (C) 2004, Stephen Hemminger <shemminger@osdl.org> | |
17 | * Copyright (C) 2005, Lukasz Stelmach <stlman@poczta.fm> | |
18 | * Copyright (C) 2005, Brian Pugh <bpugh@cs.pdx.edu> | |
19 | * Copyright (C) 2005, Judy Fischbach <jfisch@cs.pdx.edu> | |
20 | * | |
21 | * This program is free software; you can redistribute it and/or modify | |
22 | * it under the terms of the GNU General Public License as published by | |
23 | * the Free Software Foundation; either version 2 of the License, or | |
24 | * (at your option) any later version. | |
25 | * | |
26 | * This program is distributed in the hope that it will be useful, | |
27 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
28 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
29 | * GNU General Public License for more details. | |
30 | * | |
31 | * You should have received a copy of the GNU General Public License | |
32 | * along with this program; if not, write to the Free Software | |
33 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
34 | * | |
35 | *****************************************************************************/ | |
36 | ||
37 | /* | |
38 | * MCS7780 is a simple USB to IrDA bridge by MosChip. It is neither | |
39 | * compatibile with irda-usb nor with stir4200. Although it is quite | |
40 | * similar to the later as far as general idea of operation is concerned. | |
41 | * That is it requires the software to do all the framing job at SIR speeds. | |
42 | * The hardware does take care of the framing at MIR and FIR speeds. | |
43 | * It supports all speeds from 2400 through 4Mbps | |
44 | */ | |
45 | ||
46 | #include <linux/module.h> | |
47 | #include <linux/moduleparam.h> | |
48 | #include <linux/config.h> | |
49 | #include <linux/kernel.h> | |
50 | #include <linux/types.h> | |
51 | #include <linux/errno.h> | |
52 | #include <linux/init.h> | |
53 | #include <linux/slab.h> | |
54 | #include <linux/module.h> | |
55 | #include <linux/kref.h> | |
56 | #include <linux/usb.h> | |
57 | #include <linux/device.h> | |
58 | #include <linux/crc32.h> | |
59 | ||
60 | #include <asm/unaligned.h> | |
61 | #include <asm/byteorder.h> | |
62 | #include <asm/uaccess.h> | |
63 | ||
64 | #include <net/irda/irda.h> | |
65 | #include <net/irda/wrapper.h> | |
66 | #include <net/irda/crc.h> | |
67 | ||
68 | #include "mcs7780.h" | |
69 | ||
70 | #define MCS_VENDOR_ID 0x9710 | |
71 | #define MCS_PRODUCT_ID 0x7780 | |
72 | ||
73 | static struct usb_device_id mcs_table[] = { | |
74 | /* MosChip Corp., MCS7780 FIR-USB Adapter */ | |
75 | {USB_DEVICE(MCS_VENDOR_ID, MCS_PRODUCT_ID)}, | |
76 | {}, | |
77 | }; | |
78 | ||
79 | MODULE_AUTHOR("Brian Pugh <bpugh@cs.pdx.edu>"); | |
80 | MODULE_DESCRIPTION("IrDA-USB Dongle Driver for MosChip MCS7780"); | |
81 | MODULE_VERSION("0.3alpha"); | |
82 | MODULE_LICENSE("GPL"); | |
83 | ||
84 | MODULE_DEVICE_TABLE(usb, mcs_table); | |
85 | ||
86 | static int qos_mtt_bits = 0x07 /* > 1ms */ ; | |
87 | module_param(qos_mtt_bits, int, 0); | |
88 | MODULE_PARM_DESC(qos_mtt_bits, "Minimum Turn Time"); | |
89 | ||
90 | static int receive_mode = 0x1; | |
91 | module_param(receive_mode, int, 0); | |
92 | MODULE_PARM_DESC(receive_mode, | |
93 | "Receive mode of the device (1:fast, 0:slow, default:1)"); | |
94 | ||
95 | static int sir_tweak = 1; | |
96 | module_param(sir_tweak, int, 0444); | |
97 | MODULE_PARM_DESC(sir_tweak, | |
98 | "Default pulse width (1:1.6us, 0:3/16 bit, default:1)."); | |
99 | ||
100 | static int transceiver_type = MCS_TSC_VISHAY; | |
101 | module_param(transceiver_type, int, 0444); | |
102 | MODULE_PARM_DESC(transceiver_type, "IR transceiver type, see mcs7780.h."); | |
103 | ||
104 | struct usb_driver mcs_driver = { | |
105 | .name = "mcs7780", | |
106 | .probe = mcs_probe, | |
107 | .disconnect = mcs_disconnect, | |
108 | .id_table = mcs_table, | |
109 | }; | |
110 | ||
111 | /* speed flag selection by direct addressing. | |
112 | addr = (speed >> 8) & 0x0f | |
113 | ||
114 | 0x1 57600 0x2 115200 0x4 1152000 0x5 9600 | |
115 | 0x6 38400 0x9 2400 0xa 576000 0xb 19200 | |
116 | ||
117 | 4Mbps (or 2400) must be checked separately. Since it also has | |
118 | to be programmed in a different manner that is not a big problem. | |
119 | */ | |
120 | static __u16 mcs_speed_set[16] = { 0, | |
121 | MCS_SPEED_57600, | |
122 | MCS_SPEED_115200, | |
123 | 0, | |
124 | MCS_SPEED_1152000, | |
125 | MCS_SPEED_9600, | |
126 | MCS_SPEED_38400, | |
127 | 0, 0, | |
128 | MCS_SPEED_2400, | |
129 | MCS_SPEED_576000, | |
130 | MCS_SPEED_19200, | |
131 | 0, 0, 0, | |
132 | }; | |
133 | ||
134 | /* Set given 16 bit register with a 16 bit value. Send control message | |
135 | * to set dongle register. */ | |
136 | static int mcs_set_reg(struct mcs_cb *mcs, __u16 reg, __u16 val) | |
137 | { | |
138 | struct usb_device *dev = mcs->usbdev; | |
139 | return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ, | |
140 | MCS_WR_RTYPE, val, reg, NULL, 0, | |
141 | msecs_to_jiffies(MCS_CTRL_TIMEOUT)); | |
142 | } | |
143 | ||
144 | /* Get 16 bit register value. Send contol message to read dongle register. */ | |
145 | static int mcs_get_reg(struct mcs_cb *mcs, __u16 reg, __u16 * val) | |
146 | { | |
147 | struct usb_device *dev = mcs->usbdev; | |
148 | int ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ, | |
149 | MCS_RD_RTYPE, 0, reg, val, 2, | |
150 | msecs_to_jiffies(MCS_CTRL_TIMEOUT)); | |
151 | ||
152 | return ret; | |
153 | } | |
154 | ||
155 | /* Setup a communication between mcs7780 and TFDU chips. It is described | |
156 | * in more detail in the data sheet. The setup sequence puts the the | |
157 | * vishay tranceiver into high speed mode. It will also receive SIR speed | |
158 | * packets but at reduced sensitivity. | |
159 | */ | |
160 | ||
161 | /* 0: OK 1:ERROR */ | |
162 | static inline int mcs_setup_transceiver_vishay(struct mcs_cb *mcs) | |
163 | { | |
164 | int ret = 0; | |
165 | __u16 rval; | |
166 | ||
167 | /* mcs_get_reg should read exactly two bytes from the dongle */ | |
168 | ret = mcs_get_reg(mcs, MCS_XCVR_REG, &rval); | |
169 | if (unlikely(ret != 2)) { | |
170 | ret = -EIO; | |
171 | goto error; | |
172 | } | |
173 | ||
174 | /* The MCS_XCVR_CONF bit puts the transceiver into configuration | |
175 | * mode. The MCS_MODE0 bit must start out high (1) and then | |
176 | * transition to low and the MCS_STFIR and MCS_MODE1 bits must | |
177 | * be low. | |
178 | */ | |
179 | rval |= (MCS_MODE0 | MCS_XCVR_CONF); | |
180 | rval &= ~MCS_STFIR; | |
181 | rval &= ~MCS_MODE1; | |
182 | ret = mcs_set_reg(mcs, MCS_XCVR_REG, rval); | |
183 | if (unlikely(ret)) | |
184 | goto error; | |
185 | ||
186 | rval &= ~MCS_MODE0; | |
187 | ret = mcs_set_reg(mcs, MCS_XCVR_REG, rval); | |
188 | if (unlikely(ret)) | |
189 | goto error; | |
190 | ||
191 | rval &= ~MCS_XCVR_CONF; | |
192 | ret = mcs_set_reg(mcs, MCS_XCVR_REG, rval); | |
193 | if (unlikely(ret)) | |
194 | goto error; | |
195 | ||
196 | ret = 0; | |
197 | error: | |
198 | return ret; | |
199 | } | |
200 | ||
201 | /* Setup a communication between mcs7780 and agilent chip. */ | |
202 | static inline int mcs_setup_transceiver_agilent(struct mcs_cb *mcs) | |
203 | { | |
204 | IRDA_WARNING("This transceiver type is not supported yet."); | |
205 | return 1; | |
206 | } | |
207 | ||
208 | /* Setup a communication between mcs7780 and sharp chip. */ | |
209 | static inline int mcs_setup_transceiver_sharp(struct mcs_cb *mcs) | |
210 | { | |
211 | IRDA_WARNING("This transceiver type is not supported yet."); | |
212 | return 1; | |
213 | } | |
214 | ||
215 | /* Common setup for all transceivers */ | |
216 | static inline int mcs_setup_transceiver(struct mcs_cb *mcs) | |
217 | { | |
218 | int ret = 0; | |
219 | __u16 rval; | |
220 | char *msg; | |
221 | ||
222 | msg = "Basic transceiver setup error."; | |
223 | ||
224 | /* read value of MODE Register, set the DRIVER and RESET bits | |
225 | * and write value back out to MODE Register | |
226 | */ | |
227 | ret = mcs_get_reg(mcs, MCS_MODE_REG, &rval); | |
228 | if(unlikely(ret != 2)) | |
229 | goto error; | |
230 | rval |= MCS_DRIVER; /* put the mcs7780 into configuration mode. */ | |
231 | ret = mcs_set_reg(mcs, MCS_MODE_REG, rval); | |
232 | if(unlikely(ret)) | |
233 | goto error; | |
234 | ||
235 | rval = 0; /* set min pulse width to 0 initially. */ | |
236 | ret = mcs_set_reg(mcs, MCS_MINRXPW_REG, rval); | |
237 | if(unlikely(ret)) | |
238 | goto error; | |
239 | ||
240 | ret = mcs_get_reg(mcs, MCS_MODE_REG, &rval); | |
241 | if(unlikely(ret != 2)) | |
242 | goto error; | |
243 | ||
244 | rval &= ~MCS_FIR; /* turn off fir mode. */ | |
245 | if(mcs->sir_tweak) | |
246 | rval |= MCS_SIR16US; /* 1.6us pulse width */ | |
247 | else | |
248 | rval &= ~MCS_SIR16US; /* 3/16 bit time pulse width */ | |
249 | ||
250 | /* make sure ask mode and back to back packets are off. */ | |
251 | rval &= ~(MCS_BBTG | MCS_ASK); | |
252 | ||
253 | rval &= ~MCS_SPEED_MASK; | |
254 | rval |= MCS_SPEED_9600; /* make sure initial speed is 9600. */ | |
255 | mcs->speed = 9600; | |
256 | mcs->new_speed = 0; /* new_speed is set to 0 */ | |
257 | rval &= ~MCS_PLLPWDN; /* disable power down. */ | |
258 | ||
259 | /* make sure device determines direction and that the auto send sip | |
260 | * pulse are on. | |
261 | */ | |
262 | rval |= MCS_DTD | MCS_SIPEN; | |
263 | ||
264 | ret = mcs_set_reg(mcs, MCS_MODE_REG, rval); | |
265 | if(unlikely(ret)) | |
266 | goto error; | |
267 | ||
268 | msg = "transceiver model specific setup error."; | |
269 | switch (mcs->transceiver_type) { | |
270 | case MCS_TSC_VISHAY: | |
271 | ret = mcs_setup_transceiver_vishay(mcs); | |
272 | break; | |
273 | ||
274 | case MCS_TSC_SHARP: | |
275 | ret = mcs_setup_transceiver_sharp(mcs); | |
276 | break; | |
277 | ||
278 | case MCS_TSC_AGILENT: | |
279 | ret = mcs_setup_transceiver_agilent(mcs); | |
280 | break; | |
281 | ||
282 | default: | |
283 | IRDA_WARNING("Unknown transceiver type: %d", | |
284 | mcs->transceiver_type); | |
285 | ret = 1; | |
286 | } | |
287 | if (unlikely(ret)) | |
288 | goto error; | |
289 | ||
290 | /* If transceiver is not SHARP, then if receive mode set | |
291 | * on the RXFAST bit in the XCVR Register otherwise unset it | |
292 | */ | |
293 | if (mcs->transceiver_type != MCS_TSC_SHARP) { | |
294 | ||
295 | ret = mcs_get_reg(mcs, MCS_XCVR_REG, &rval); | |
296 | if (unlikely(ret != 2)) | |
297 | goto error; | |
298 | if (mcs->receive_mode) | |
299 | rval |= MCS_RXFAST; | |
300 | else | |
301 | rval &= ~MCS_RXFAST; | |
302 | ret = mcs_set_reg(mcs, MCS_XCVR_REG, rval); | |
303 | if (unlikely(ret)) | |
304 | goto error; | |
305 | } | |
306 | ||
307 | msg = "transceiver reset."; | |
308 | ||
309 | ret = mcs_get_reg(mcs, MCS_MODE_REG, &rval); | |
310 | if (unlikely(ret != 2)) | |
311 | goto error; | |
312 | ||
313 | /* reset the mcs7780 so all changes take effect. */ | |
314 | rval &= ~MCS_RESET; | |
315 | ret = mcs_set_reg(mcs, MCS_MODE_REG, rval); | |
316 | if (unlikely(ret)) | |
317 | goto error; | |
318 | else | |
319 | return ret; | |
320 | ||
321 | error: | |
322 | IRDA_ERROR("%s", msg); | |
323 | return ret; | |
324 | } | |
325 | ||
326 | /* Wraps the data in format for SIR */ | |
327 | static inline int mcs_wrap_sir_skb(struct sk_buff *skb, __u8 * buf) | |
328 | { | |
329 | int wraplen; | |
330 | ||
331 | /* 2: full frame length, including "the length" */ | |
332 | wraplen = async_wrap_skb(skb, buf + 2, 4094); | |
333 | ||
334 | wraplen += 2; | |
335 | buf[0] = wraplen & 0xff; | |
336 | buf[1] = (wraplen >> 8) & 0xff; | |
337 | ||
338 | return wraplen; | |
339 | } | |
340 | ||
341 | /* Wraps the data in format for FIR */ | |
342 | static unsigned mcs_wrap_fir_skb(const struct sk_buff *skb, __u8 *buf) | |
343 | { | |
344 | unsigned int len = 0; | |
345 | __u32 fcs = ~(crc32_le(~0, skb->data, skb->len)); | |
346 | ||
347 | /* add 2 bytes for length value and 4 bytes for fcs. */ | |
348 | len = skb->len + 6; | |
349 | ||
350 | /* The mcs7780 requires that the first two bytes are the packet | |
351 | * length in little endian order. Note: the length value includes | |
352 | * the two bytes for the length value itself. | |
353 | */ | |
354 | buf[0] = len & 0xff; | |
355 | buf[1] = (len >> 8) & 0xff; | |
356 | /* copy the data into the tx buffer. */ | |
357 | memcpy(buf+2, skb->data, skb->len); | |
358 | /* put the fcs in the last four bytes in little endian order. */ | |
359 | buf[len - 4] = fcs & 0xff; | |
360 | buf[len - 3] = (fcs >> 8) & 0xff; | |
361 | buf[len - 2] = (fcs >> 16) & 0xff; | |
362 | buf[len - 1] = (fcs >> 24) & 0xff; | |
363 | ||
364 | return len; | |
365 | } | |
366 | ||
367 | /* Wraps the data in format for MIR */ | |
368 | static unsigned mcs_wrap_mir_skb(const struct sk_buff *skb, __u8 *buf) | |
369 | { | |
370 | __u16 fcs = 0; | |
371 | int len = skb->len + 4; | |
372 | ||
373 | fcs = ~(irda_calc_crc16(~fcs, skb->data, skb->len)); | |
374 | /* put the total packet length in first. Note: packet length | |
375 | * value includes the two bytes that hold the packet length | |
376 | * itself. | |
377 | */ | |
378 | buf[0] = len & 0xff; | |
379 | buf[1] = (len >> 8) & 0xff; | |
380 | /* copy the data */ | |
381 | memcpy(buf+2, skb->data, skb->len); | |
382 | /* put the fcs in last two bytes in little endian order. */ | |
383 | buf[len - 2] = fcs & 0xff; | |
384 | buf[len - 1] = (fcs >> 8) & 0xff; | |
385 | ||
386 | return len; | |
387 | } | |
388 | ||
389 | /* Unwrap received packets at MIR speed. A 16 bit crc_ccitt checksum is | |
390 | * used for the fcs. When performed over the entire packet the result | |
391 | * should be GOOD_FCS = 0xf0b8. Hands the unwrapped data off to the IrDA | |
392 | * layer via a sk_buff. | |
393 | */ | |
394 | static void mcs_unwrap_mir(struct mcs_cb *mcs, __u8 *buf, int len) | |
395 | { | |
396 | __u16 fcs; | |
397 | int new_len; | |
398 | struct sk_buff *skb; | |
399 | ||
400 | /* Assume that the frames are going to fill a single packet | |
401 | * rather than span multiple packets. | |
402 | */ | |
403 | ||
404 | new_len = len - 2; | |
405 | if(unlikely(new_len <= 0)) { | |
406 | IRDA_ERROR("%s short frame length %d\n", | |
407 | mcs->netdev->name, new_len); | |
408 | ++mcs->stats.rx_errors; | |
409 | ++mcs->stats.rx_length_errors; | |
410 | return; | |
411 | } | |
412 | fcs = 0; | |
413 | fcs = irda_calc_crc16(~fcs, buf, len); | |
414 | ||
415 | if(fcs != GOOD_FCS) { | |
416 | IRDA_ERROR("crc error calc 0x%x len %d\n", | |
417 | fcs, new_len); | |
418 | mcs->stats.rx_errors++; | |
419 | mcs->stats.rx_crc_errors++; | |
420 | return; | |
421 | } | |
422 | ||
423 | skb = dev_alloc_skb(new_len + 1); | |
424 | if(unlikely(!skb)) { | |
425 | ++mcs->stats.rx_dropped; | |
426 | return; | |
427 | } | |
428 | ||
429 | skb_reserve(skb, 1); | |
430 | memcpy(skb->data, buf, new_len); | |
431 | skb_put(skb, new_len); | |
432 | skb->mac.raw = skb->data; | |
433 | skb->protocol = htons(ETH_P_IRDA); | |
434 | skb->dev = mcs->netdev; | |
435 | ||
436 | netif_rx(skb); | |
437 | ||
438 | mcs->stats.rx_packets++; | |
439 | mcs->stats.rx_bytes += new_len; | |
440 | ||
441 | return; | |
442 | } | |
443 | ||
444 | /* Unwrap received packets at FIR speed. A 32 bit crc_ccitt checksum is | |
445 | * used for the fcs. Hands the unwrapped data off to the IrDA | |
446 | * layer via a sk_buff. | |
447 | */ | |
448 | static void mcs_unwrap_fir(struct mcs_cb *mcs, __u8 *buf, int len) | |
449 | { | |
450 | __u32 fcs; | |
451 | int new_len; | |
452 | struct sk_buff *skb; | |
453 | ||
454 | /* Assume that the frames are going to fill a single packet | |
455 | * rather than span multiple packets. This is most likely a false | |
456 | * assumption. | |
457 | */ | |
458 | ||
459 | new_len = len - 4; | |
460 | if(unlikely(new_len <= 0)) { | |
461 | IRDA_ERROR("%s short frame length %d\n", | |
462 | mcs->netdev->name, new_len); | |
463 | ++mcs->stats.rx_errors; | |
464 | ++mcs->stats.rx_length_errors; | |
465 | return; | |
466 | } | |
467 | ||
468 | fcs = ~(crc32_le(~0, buf, new_len)); | |
469 | if(fcs != le32_to_cpu(get_unaligned((u32 *)(buf+new_len)))) { | |
470 | IRDA_ERROR("crc error calc 0x%x len %d\n", fcs, new_len); | |
471 | mcs->stats.rx_errors++; | |
472 | mcs->stats.rx_crc_errors++; | |
473 | return; | |
474 | } | |
475 | ||
476 | skb = dev_alloc_skb(new_len + 1); | |
477 | if(unlikely(!skb)) { | |
478 | ++mcs->stats.rx_dropped; | |
479 | return; | |
480 | } | |
481 | ||
482 | skb_reserve(skb, 1); | |
483 | memcpy(skb->data, buf, new_len); | |
484 | skb_put(skb, new_len); | |
485 | skb->mac.raw = skb->data; | |
486 | skb->protocol = htons(ETH_P_IRDA); | |
487 | skb->dev = mcs->netdev; | |
488 | ||
489 | netif_rx(skb); | |
490 | ||
491 | mcs->stats.rx_packets++; | |
492 | mcs->stats.rx_bytes += new_len; | |
493 | ||
494 | return; | |
495 | } | |
496 | ||
497 | ||
498 | /* Allocates urbs for both receive and transmit. | |
499 | * If alloc fails return error code 0 (fail) otherwise | |
500 | * return error code 1 (success). | |
501 | */ | |
502 | static inline int mcs_setup_urbs(struct mcs_cb *mcs) | |
503 | { | |
504 | mcs->rx_urb = NULL; | |
505 | ||
506 | mcs->tx_urb = usb_alloc_urb(0, GFP_KERNEL); | |
507 | if (!mcs->tx_urb) | |
508 | return 0; | |
509 | ||
510 | mcs->rx_urb = usb_alloc_urb(0, GFP_KERNEL); | |
511 | if (!mcs->rx_urb) | |
512 | return 0; | |
513 | ||
514 | return 1; | |
515 | } | |
516 | ||
517 | /* Sets up state to be initially outside frame, gets receive urb, | |
518 | * sets status to successful and then submits the urb to start | |
519 | * receiving the data. | |
520 | */ | |
521 | static inline int mcs_receive_start(struct mcs_cb *mcs) | |
522 | { | |
523 | mcs->rx_buff.in_frame = FALSE; | |
524 | mcs->rx_buff.state = OUTSIDE_FRAME; | |
525 | ||
526 | usb_fill_bulk_urb(mcs->rx_urb, mcs->usbdev, | |
527 | usb_rcvbulkpipe(mcs->usbdev, mcs->ep_in), | |
528 | mcs->in_buf, 4096, mcs_receive_irq, mcs); | |
529 | ||
530 | mcs->rx_urb->status = 0; | |
531 | return usb_submit_urb(mcs->rx_urb, GFP_KERNEL); | |
532 | } | |
533 | ||
534 | /* Finds the in and out endpoints for the mcs control block */ | |
535 | static inline int mcs_find_endpoints(struct mcs_cb *mcs, | |
536 | struct usb_host_endpoint *ep, int epnum) | |
537 | { | |
538 | int i; | |
539 | int ret = 0; | |
540 | ||
541 | /* If no place to store the endpoints just return */ | |
542 | if (!ep) | |
543 | return ret; | |
544 | ||
545 | /* cycle through all endpoints, find the first two that are DIR_IN */ | |
546 | for (i = 0; i < epnum; i++) { | |
547 | if (ep[i].desc.bEndpointAddress & USB_DIR_IN) | |
548 | mcs->ep_in = ep[i].desc.bEndpointAddress; | |
549 | else | |
550 | mcs->ep_out = ep[i].desc.bEndpointAddress; | |
551 | ||
552 | /* MosChip says that the chip has only two bulk | |
553 | * endpoints. Find one for each direction and move on. | |
554 | */ | |
555 | if ((mcs->ep_in != 0) && (mcs->ep_out != 0)) { | |
556 | ret = 1; | |
557 | break; | |
558 | } | |
559 | } | |
560 | ||
561 | return ret; | |
562 | } | |
563 | ||
564 | static void mcs_speed_work(void *arg) | |
565 | { | |
566 | struct mcs_cb *mcs = arg; | |
567 | struct net_device *netdev = mcs->netdev; | |
568 | ||
569 | mcs_speed_change(mcs); | |
570 | netif_wake_queue(netdev); | |
571 | } | |
572 | ||
573 | /* Function to change the speed of the mcs7780. Fully supports SIR, | |
574 | * MIR, and FIR speeds. | |
575 | */ | |
576 | static int mcs_speed_change(struct mcs_cb *mcs) | |
577 | { | |
578 | int ret = 0; | |
579 | int rst = 0; | |
580 | int cnt = 0; | |
581 | __u16 nspeed; | |
582 | __u16 rval; | |
583 | ||
584 | nspeed = mcs_speed_set[(mcs->new_speed >> 8) & 0x0f]; | |
585 | ||
586 | do { | |
587 | mcs_get_reg(mcs, MCS_RESV_REG, &rval); | |
588 | } while(cnt++ < 100 && (rval & MCS_IRINTX)); | |
589 | ||
590 | if(cnt >= 100) { | |
591 | IRDA_ERROR("unable to change speed"); | |
592 | ret = -EIO; | |
593 | goto error; | |
594 | } | |
595 | ||
596 | mcs_get_reg(mcs, MCS_MODE_REG, &rval); | |
597 | ||
598 | /* MINRXPW values recomended by MosChip */ | |
599 | if (mcs->new_speed <= 115200) { | |
600 | rval &= ~MCS_FIR; | |
601 | ||
602 | if ((rst = (mcs->speed > 115200))) | |
603 | mcs_set_reg(mcs, MCS_MINRXPW_REG, 0); | |
604 | ||
605 | } else if (mcs->new_speed <= 1152000) { | |
606 | rval &= ~MCS_FIR; | |
607 | ||
608 | if ((rst = !(mcs->speed == 576000 || mcs->speed == 1152000))) | |
609 | mcs_set_reg(mcs, MCS_MINRXPW_REG, 5); | |
610 | ||
611 | } else { | |
612 | rval |= MCS_FIR; | |
613 | ||
614 | if ((rst = (mcs->speed != 4000000))) | |
615 | mcs_set_reg(mcs, MCS_MINRXPW_REG, 5); | |
616 | ||
617 | } | |
618 | ||
619 | rval &= ~MCS_SPEED_MASK; | |
620 | rval |= nspeed; | |
621 | ||
622 | ret = mcs_set_reg(mcs, MCS_MODE_REG, rval); | |
623 | if (unlikely(ret)) | |
624 | goto error; | |
625 | ||
626 | if (rst) | |
627 | switch (mcs->transceiver_type) { | |
628 | case MCS_TSC_VISHAY: | |
629 | ret = mcs_setup_transceiver_vishay(mcs); | |
630 | break; | |
631 | ||
632 | case MCS_TSC_SHARP: | |
633 | ret = mcs_setup_transceiver_sharp(mcs); | |
634 | break; | |
635 | ||
636 | case MCS_TSC_AGILENT: | |
637 | ret = mcs_setup_transceiver_agilent(mcs); | |
638 | break; | |
639 | ||
640 | default: | |
641 | ret = 1; | |
642 | IRDA_WARNING("Unknown transceiver type: %d", | |
643 | mcs->transceiver_type); | |
644 | } | |
645 | if (unlikely(ret)) | |
646 | goto error; | |
647 | ||
648 | mcs_get_reg(mcs, MCS_MODE_REG, &rval); | |
649 | rval &= ~MCS_RESET; | |
650 | ret = mcs_set_reg(mcs, MCS_MODE_REG, rval); | |
651 | ||
652 | mcs->speed = mcs->new_speed; | |
653 | error: | |
654 | mcs->new_speed = 0; | |
655 | return ret; | |
656 | } | |
657 | ||
658 | /* Ioctl calls not supported at this time. Can be an area of future work. */ | |
659 | static int mcs_net_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd) | |
660 | { | |
661 | /* struct if_irda_req *irq = (struct if_irda_req *)rq; */ | |
662 | /* struct mcs_cb *mcs = netdev_priv(netdev); */ | |
663 | int ret = 0; | |
664 | ||
665 | switch (cmd) { | |
666 | default: | |
667 | ret = -EOPNOTSUPP; | |
668 | } | |
669 | ||
670 | return ret; | |
671 | } | |
672 | ||
673 | /* Network device is taken down, done by "ifconfig irda0 down" */ | |
674 | static int mcs_net_close(struct net_device *netdev) | |
675 | { | |
676 | int ret = 0; | |
677 | struct mcs_cb *mcs = netdev_priv(netdev); | |
678 | ||
679 | /* Stop transmit processing */ | |
680 | netif_stop_queue(netdev); | |
681 | ||
682 | /* kill and free the receive and transmit URBs */ | |
683 | usb_kill_urb(mcs->rx_urb); | |
684 | usb_free_urb(mcs->rx_urb); | |
685 | usb_kill_urb(mcs->tx_urb); | |
686 | usb_free_urb(mcs->tx_urb); | |
687 | ||
688 | /* Stop and remove instance of IrLAP */ | |
689 | if (mcs->irlap) | |
690 | irlap_close(mcs->irlap); | |
691 | ||
692 | mcs->irlap = NULL; | |
693 | return ret; | |
694 | } | |
695 | ||
696 | /* Network device is taken up, done by "ifconfig irda0 up" */ | |
697 | static int mcs_net_open(struct net_device *netdev) | |
698 | { | |
699 | struct mcs_cb *mcs = netdev_priv(netdev); | |
700 | char hwname[16]; | |
701 | int ret = 0; | |
702 | ||
703 | ret = usb_clear_halt(mcs->usbdev, | |
704 | usb_sndbulkpipe(mcs->usbdev, mcs->ep_in)); | |
705 | if (ret) | |
706 | goto error1; | |
707 | ret = usb_clear_halt(mcs->usbdev, | |
708 | usb_rcvbulkpipe(mcs->usbdev, mcs->ep_out)); | |
709 | if (ret) | |
710 | goto error1; | |
711 | ||
712 | ret = mcs_setup_transceiver(mcs); | |
713 | if (ret) | |
714 | goto error1; | |
715 | ||
716 | ret = -ENOMEM; | |
717 | ||
718 | /* Initialize for SIR/FIR to copy data directly into skb. */ | |
719 | mcs->receiving = 0; | |
720 | mcs->rx_buff.truesize = IRDA_SKB_MAX_MTU; | |
721 | mcs->rx_buff.skb = dev_alloc_skb(IRDA_SKB_MAX_MTU); | |
722 | if (!mcs->rx_buff.skb) | |
723 | goto error1; | |
724 | ||
725 | skb_reserve(mcs->rx_buff.skb, 1); | |
726 | mcs->rx_buff.head = mcs->rx_buff.skb->data; | |
727 | do_gettimeofday(&mcs->rx_time); | |
728 | ||
729 | /* | |
730 | * Now that everything should be initialized properly, | |
731 | * Open new IrLAP layer instance to take care of us... | |
732 | * Note : will send immediately a speed change... | |
733 | */ | |
734 | sprintf(hwname, "usb#%d", mcs->usbdev->devnum); | |
735 | mcs->irlap = irlap_open(netdev, &mcs->qos, hwname); | |
736 | if (!mcs->irlap) { | |
737 | IRDA_ERROR("mcs7780: irlap_open failed"); | |
738 | goto error2; | |
739 | } | |
740 | ||
741 | if (!mcs_setup_urbs(mcs)) | |
742 | goto error3; | |
743 | ||
744 | ret = mcs_receive_start(mcs); | |
745 | if (ret) | |
746 | goto error3; | |
747 | ||
748 | netif_start_queue(netdev); | |
749 | return 0; | |
750 | ||
751 | error3: | |
752 | irlap_close(mcs->irlap); | |
753 | error2: | |
754 | kfree_skb(mcs->rx_buff.skb); | |
755 | error1: | |
756 | return ret; | |
757 | } | |
758 | ||
759 | ||
760 | /* Get device stats for /proc/net/dev and ifconfig */ | |
761 | static struct net_device_stats *mcs_net_get_stats(struct net_device *netdev) | |
762 | { | |
763 | struct mcs_cb *mcs = netdev_priv(netdev); | |
764 | return &mcs->stats; | |
765 | } | |
766 | ||
767 | /* Receive callback function. */ | |
768 | static void mcs_receive_irq(struct urb *urb, struct pt_regs *regs) | |
769 | { | |
770 | __u8 *bytes; | |
771 | struct mcs_cb *mcs = urb->context; | |
772 | int i; | |
773 | int ret; | |
774 | ||
775 | if (!netif_running(mcs->netdev)) | |
776 | return; | |
777 | ||
778 | if (urb->status) | |
779 | return; | |
780 | ||
781 | if (urb->actual_length > 0) { | |
782 | bytes = urb->transfer_buffer; | |
783 | ||
784 | /* MCS returns frames without BOF and EOF | |
785 | * I assume it returns whole frames. | |
786 | */ | |
787 | /* SIR speed */ | |
788 | if(mcs->speed < 576000) { | |
789 | async_unwrap_char(mcs->netdev, &mcs->stats, | |
790 | &mcs->rx_buff, 0xc0); | |
791 | ||
792 | for (i = 0; i < urb->actual_length; i++) | |
793 | async_unwrap_char(mcs->netdev, &mcs->stats, | |
794 | &mcs->rx_buff, bytes[i]); | |
795 | ||
796 | async_unwrap_char(mcs->netdev, &mcs->stats, | |
797 | &mcs->rx_buff, 0xc1); | |
798 | } | |
799 | /* MIR speed */ | |
800 | else if(mcs->speed == 576000 || mcs->speed == 1152000) { | |
801 | mcs_unwrap_mir(mcs, urb->transfer_buffer, | |
802 | urb->actual_length); | |
803 | } | |
804 | /* FIR speed */ | |
805 | else { | |
806 | mcs_unwrap_fir(mcs, urb->transfer_buffer, | |
807 | urb->actual_length); | |
808 | } | |
809 | mcs->netdev->last_rx = jiffies; | |
810 | do_gettimeofday(&mcs->rx_time); | |
811 | } | |
812 | ||
813 | ret = usb_submit_urb(urb, GFP_ATOMIC); | |
814 | } | |
815 | ||
816 | /* Transmit callback funtion. */ | |
817 | static void mcs_send_irq(struct urb *urb, struct pt_regs *regs) | |
818 | { | |
819 | struct mcs_cb *mcs = urb->context; | |
820 | struct net_device *ndev = mcs->netdev; | |
821 | ||
822 | if (unlikely(mcs->new_speed)) | |
823 | schedule_work(&mcs->work); | |
824 | else | |
825 | netif_wake_queue(ndev); | |
826 | } | |
827 | ||
828 | /* Transmit callback funtion. */ | |
829 | static int mcs_hard_xmit(struct sk_buff *skb, struct net_device *ndev) | |
830 | { | |
831 | unsigned long flags; | |
832 | struct mcs_cb *mcs; | |
833 | int wraplen; | |
834 | int ret = 0; | |
835 | ||
836 | ||
837 | if (skb == NULL || ndev == NULL) | |
838 | return -EINVAL; | |
839 | ||
840 | netif_stop_queue(ndev); | |
841 | mcs = netdev_priv(ndev); | |
842 | ||
843 | spin_lock_irqsave(&mcs->lock, flags); | |
844 | ||
845 | mcs->new_speed = irda_get_next_speed(skb); | |
846 | if (likely(mcs->new_speed == mcs->speed)) | |
847 | mcs->new_speed = 0; | |
848 | ||
849 | /* SIR speed */ | |
850 | if(mcs->speed < 576000) { | |
851 | wraplen = mcs_wrap_sir_skb(skb, mcs->out_buf); | |
852 | } | |
853 | /* MIR speed */ | |
854 | else if(mcs->speed == 576000 || mcs->speed == 1152000) { | |
855 | wraplen = mcs_wrap_mir_skb(skb, mcs->out_buf); | |
856 | } | |
857 | /* FIR speed */ | |
858 | else { | |
859 | wraplen = mcs_wrap_fir_skb(skb, mcs->out_buf); | |
860 | } | |
861 | usb_fill_bulk_urb(mcs->tx_urb, mcs->usbdev, | |
862 | usb_sndbulkpipe(mcs->usbdev, mcs->ep_out), | |
863 | mcs->out_buf, wraplen, mcs_send_irq, mcs); | |
864 | ||
865 | if ((ret = usb_submit_urb(mcs->tx_urb, GFP_ATOMIC))) { | |
866 | IRDA_ERROR("failed tx_urb: %d", ret); | |
867 | switch (ret) { | |
868 | case -ENODEV: | |
869 | case -EPIPE: | |
870 | break; | |
871 | default: | |
872 | mcs->stats.tx_errors++; | |
873 | netif_start_queue(ndev); | |
874 | } | |
875 | } else { | |
876 | mcs->stats.tx_packets++; | |
877 | mcs->stats.tx_bytes += skb->len; | |
878 | } | |
879 | ||
880 | dev_kfree_skb(skb); | |
881 | spin_unlock_irqrestore(&mcs->lock, flags); | |
882 | return ret; | |
883 | } | |
884 | ||
885 | /* | |
886 | * This function is called by the USB subsystem for each new device in the | |
887 | * system. Need to verify the device and if it is, then start handling it. | |
888 | */ | |
889 | static int mcs_probe(struct usb_interface *intf, | |
890 | const struct usb_device_id *id) | |
891 | { | |
892 | struct usb_device *udev = interface_to_usbdev(intf); | |
893 | struct net_device *ndev = NULL; | |
894 | struct mcs_cb *mcs; | |
895 | int ret = -ENOMEM; | |
896 | ||
897 | ndev = alloc_irdadev(sizeof(*mcs)); | |
898 | if (!ndev) | |
899 | goto error1; | |
900 | ||
901 | IRDA_DEBUG(1, "MCS7780 USB-IrDA bridge found at %d.", udev->devnum); | |
902 | ||
903 | /* what is it realy for? */ | |
904 | SET_MODULE_OWNER(ndev); | |
905 | SET_NETDEV_DEV(ndev, &intf->dev); | |
906 | ||
907 | ret = usb_reset_configuration(udev); | |
908 | if (ret != 0) { | |
909 | IRDA_ERROR("mcs7780: usb reset configuration failed"); | |
910 | goto error2; | |
911 | } | |
912 | ||
913 | mcs = netdev_priv(ndev); | |
914 | mcs->usbdev = udev; | |
915 | mcs->netdev = ndev; | |
916 | spin_lock_init(&mcs->lock); | |
917 | ||
918 | /* Initialize QoS for this device */ | |
919 | irda_init_max_qos_capabilies(&mcs->qos); | |
920 | ||
921 | /* That's the Rx capability. */ | |
922 | mcs->qos.baud_rate.bits &= | |
923 | IR_2400 | IR_9600 | IR_19200 | IR_38400 | IR_57600 | IR_115200 | |
924 | | IR_576000 | IR_1152000 | (IR_4000000 << 8); | |
925 | ||
926 | ||
927 | mcs->qos.min_turn_time.bits &= qos_mtt_bits; | |
928 | irda_qos_bits_to_value(&mcs->qos); | |
929 | ||
930 | /* Speed change work initialisation*/ | |
931 | INIT_WORK(&mcs->work, mcs_speed_work, mcs); | |
932 | ||
933 | /* Override the network functions we need to use */ | |
934 | ndev->hard_start_xmit = mcs_hard_xmit; | |
935 | ndev->open = mcs_net_open; | |
936 | ndev->stop = mcs_net_close; | |
937 | ndev->get_stats = mcs_net_get_stats; | |
938 | ndev->do_ioctl = mcs_net_ioctl; | |
939 | ||
940 | if (!intf->cur_altsetting) | |
941 | goto error2; | |
942 | ||
943 | ret = mcs_find_endpoints(mcs, intf->cur_altsetting->endpoint, | |
944 | intf->cur_altsetting->desc.bNumEndpoints); | |
945 | if (!ret) { | |
946 | ret = -ENODEV; | |
947 | goto error2; | |
948 | } | |
949 | ||
950 | ret = register_netdev(ndev); | |
951 | if (ret != 0) | |
952 | goto error2; | |
953 | ||
954 | IRDA_DEBUG(1, "IrDA: Registered MosChip MCS7780 device as %s", | |
955 | ndev->name); | |
956 | ||
957 | mcs->transceiver_type = transceiver_type; | |
958 | mcs->sir_tweak = sir_tweak; | |
959 | mcs->receive_mode = receive_mode; | |
960 | ||
961 | usb_set_intfdata(intf, mcs); | |
962 | return 0; | |
963 | ||
964 | error2: | |
965 | free_netdev(ndev); | |
966 | ||
967 | error1: | |
968 | return ret; | |
969 | } | |
970 | ||
971 | /* The current device is removed, the USB layer tells us to shut down. */ | |
972 | static void mcs_disconnect(struct usb_interface *intf) | |
973 | { | |
974 | struct mcs_cb *mcs = usb_get_intfdata(intf); | |
975 | ||
976 | if (!mcs) | |
977 | return; | |
978 | ||
979 | flush_scheduled_work(); | |
980 | ||
981 | unregister_netdev(mcs->netdev); | |
982 | free_netdev(mcs->netdev); | |
983 | ||
984 | usb_set_intfdata(intf, NULL); | |
985 | IRDA_DEBUG(0, "MCS7780 now disconnected."); | |
986 | } | |
987 | ||
988 | /* Module insertion */ | |
989 | static int __init mcs_init(void) | |
990 | { | |
991 | int result; | |
992 | ||
993 | /* register this driver with the USB subsystem */ | |
994 | result = usb_register(&mcs_driver); | |
995 | if (result) | |
996 | IRDA_ERROR("usb_register failed. Error number %d", result); | |
997 | ||
998 | return result; | |
999 | } | |
1000 | module_init(mcs_init); | |
1001 | ||
1002 | /* Module removal */ | |
1003 | static void __exit mcs_exit(void) | |
1004 | { | |
1005 | /* deregister this driver with the USB subsystem */ | |
1006 | usb_deregister(&mcs_driver); | |
1007 | } | |
1008 | module_exit(mcs_exit); | |
1009 |