xref: /linux/drivers/net/ieee802154/atusb.c (revision 7ae9fb1b7ecbb5d85d07857943f677fd1a559b18)
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * atusb.c - Driver for the ATUSB IEEE 802.15.4 dongle
4  *
5  * Written 2013 by Werner Almesberger <werner@almesberger.net>
6  *
7  * Copyright (c) 2015 - 2016 Stefan Schmidt <stefan@datenfreihafen.org>
8  *
9  * Based on at86rf230.c and spi_atusb.c.
10  * at86rf230.c is
11  * Copyright (C) 2009 Siemens AG
12  * Written by: Dmitry Eremin-Solenikov <dmitry.baryshkov@siemens.com>
13  *
14  * spi_atusb.c is
15  * Copyright (c) 2011 Richard Sharpe <realrichardsharpe@gmail.com>
16  * Copyright (c) 2011 Stefan Schmidt <stefan@datenfreihafen.org>
17  * Copyright (c) 2011 Werner Almesberger <werner@almesberger.net>
18  *
19  * USB initialization is
20  * Copyright (c) 2013 Alexander Aring <alex.aring@gmail.com>
21  *
22  * Busware HUL support is
23  * Copyright (c) 2017 Josef Filzmaier <j.filzmaier@gmx.at>
24  */
25 
26 #include <linux/kernel.h>
27 #include <linux/slab.h>
28 #include <linux/module.h>
29 #include <linux/jiffies.h>
30 #include <linux/usb.h>
31 #include <linux/skbuff.h>
32 
33 #include <net/cfg802154.h>
34 #include <net/mac802154.h>
35 
36 #include "at86rf230.h"
37 #include "atusb.h"
38 
39 #define ATUSB_JEDEC_ATMEL	0x1f	/* JEDEC manufacturer ID */
40 
41 #define ATUSB_NUM_RX_URBS	4	/* allow for a bit of local latency */
42 #define ATUSB_ALLOC_DELAY_MS	100	/* delay after failed allocation */
43 #define ATUSB_TX_TIMEOUT_MS	200	/* on the air timeout */
44 
45 struct atusb {
46 	struct ieee802154_hw *hw;
47 	struct usb_device *usb_dev;
48 	struct atusb_chip_data *data;
49 	int shutdown;			/* non-zero if shutting down */
50 	int err;			/* set by first error */
51 
52 	/* RX variables */
53 	struct delayed_work work;	/* memory allocations */
54 	struct usb_anchor idle_urbs;	/* URBs waiting to be submitted */
55 	struct usb_anchor rx_urbs;	/* URBs waiting for reception */
56 
57 	/* TX variables */
58 	struct usb_ctrlrequest tx_dr;
59 	struct urb *tx_urb;
60 	struct sk_buff *tx_skb;
61 	u8 tx_ack_seq;		/* current TX ACK sequence number */
62 
63 	/* Firmware variable */
64 	unsigned char fw_ver_maj;	/* Firmware major version number */
65 	unsigned char fw_ver_min;	/* Firmware minor version number */
66 	unsigned char fw_hw_type;	/* Firmware hardware type */
67 };
68 
69 struct atusb_chip_data {
70 	u16 t_channel_switch;
71 	int rssi_base_val;
72 
73 	int (*set_channel)(struct ieee802154_hw*, u8, u8);
74 	int (*set_txpower)(struct ieee802154_hw*, s32);
75 };
76 
atusb_write_subreg(struct atusb * atusb,u8 reg,u8 mask,u8 shift,u8 value)77 static int atusb_write_subreg(struct atusb *atusb, u8 reg, u8 mask,
78 			      u8 shift, u8 value)
79 {
80 	struct usb_device *usb_dev = atusb->usb_dev;
81 	u8 orig, tmp;
82 	int ret = 0;
83 
84 	dev_dbg(&usb_dev->dev, "%s: 0x%02x <- 0x%02x\n", __func__, reg, value);
85 
86 	ret = usb_control_msg_recv(usb_dev, 0, ATUSB_REG_READ, ATUSB_REQ_FROM_DEV,
87 				   0, reg, &orig, 1, 1000, GFP_KERNEL);
88 	if (ret < 0)
89 		return ret;
90 
91 	/* Write the value only into that part of the register which is allowed
92 	 * by the mask. All other bits stay as before.
93 	 */
94 	tmp = orig & ~mask;
95 	tmp |= (value << shift) & mask;
96 
97 	if (tmp != orig)
98 		ret = usb_control_msg_send(usb_dev, 0, ATUSB_REG_WRITE, ATUSB_REQ_TO_DEV,
99 					   tmp, reg, NULL, 0, 1000, GFP_KERNEL);
100 
101 	return ret;
102 }
103 
atusb_read_subreg(struct atusb * lp,unsigned int addr,unsigned int mask,unsigned int shift)104 static int atusb_read_subreg(struct atusb *lp,
105 			     unsigned int addr, unsigned int mask,
106 			     unsigned int shift)
107 {
108 	int reg, ret;
109 
110 	ret = usb_control_msg_recv(lp->usb_dev, 0, ATUSB_REG_READ, ATUSB_REQ_FROM_DEV,
111 				   0, addr, &reg, 1, 1000, GFP_KERNEL);
112 	if (ret < 0)
113 		return ret;
114 
115 	reg = (reg & mask) >> shift;
116 
117 	return reg;
118 }
119 
atusb_get_and_clear_error(struct atusb * atusb)120 static int atusb_get_and_clear_error(struct atusb *atusb)
121 {
122 	int err = atusb->err;
123 
124 	atusb->err = 0;
125 	return err;
126 }
127 
128 /* ----- skb allocation ---------------------------------------------------- */
129 
130 #define MAX_PSDU	127
131 #define MAX_RX_XFER	(1 + MAX_PSDU + 2 + 1)	/* PHR+PSDU+CRC+LQI */
132 
133 #define SKB_ATUSB(skb)	(*(struct atusb **)(skb)->cb)
134 
135 static void atusb_in(struct urb *urb);
136 
atusb_submit_rx_urb(struct atusb * atusb,struct urb * urb)137 static int atusb_submit_rx_urb(struct atusb *atusb, struct urb *urb)
138 {
139 	struct usb_device *usb_dev = atusb->usb_dev;
140 	struct sk_buff *skb = urb->context;
141 	int ret;
142 
143 	if (!skb) {
144 		skb = alloc_skb(MAX_RX_XFER, GFP_KERNEL);
145 		if (!skb) {
146 			dev_warn_ratelimited(&usb_dev->dev,
147 					     "atusb_in: can't allocate skb\n");
148 			return -ENOMEM;
149 		}
150 		skb_put(skb, MAX_RX_XFER);
151 		SKB_ATUSB(skb) = atusb;
152 	}
153 
154 	usb_fill_bulk_urb(urb, usb_dev, usb_rcvbulkpipe(usb_dev, 1),
155 			  skb->data, MAX_RX_XFER, atusb_in, skb);
156 	usb_anchor_urb(urb, &atusb->rx_urbs);
157 
158 	ret = usb_submit_urb(urb, GFP_KERNEL);
159 	if (ret) {
160 		usb_unanchor_urb(urb);
161 		kfree_skb(skb);
162 		urb->context = NULL;
163 	}
164 	return ret;
165 }
166 
atusb_work_urbs(struct work_struct * work)167 static void atusb_work_urbs(struct work_struct *work)
168 {
169 	struct atusb *atusb =
170 	    container_of(to_delayed_work(work), struct atusb, work);
171 	struct usb_device *usb_dev = atusb->usb_dev;
172 	struct urb *urb;
173 	int ret;
174 
175 	if (atusb->shutdown)
176 		return;
177 
178 	do {
179 		urb = usb_get_from_anchor(&atusb->idle_urbs);
180 		if (!urb)
181 			return;
182 		ret = atusb_submit_rx_urb(atusb, urb);
183 	} while (!ret);
184 
185 	usb_anchor_urb(urb, &atusb->idle_urbs);
186 	dev_warn_ratelimited(&usb_dev->dev,
187 			     "atusb_in: can't allocate/submit URB (%d)\n", ret);
188 	schedule_delayed_work(&atusb->work,
189 			      msecs_to_jiffies(ATUSB_ALLOC_DELAY_MS) + 1);
190 }
191 
192 /* ----- Asynchronous USB -------------------------------------------------- */
193 
atusb_tx_done(struct atusb * atusb,u8 seq,int reason)194 static void atusb_tx_done(struct atusb *atusb, u8 seq, int reason)
195 {
196 	struct usb_device *usb_dev = atusb->usb_dev;
197 	u8 expect = atusb->tx_ack_seq;
198 
199 	dev_dbg(&usb_dev->dev, "%s (0x%02x/0x%02x)\n", __func__, seq, expect);
200 	if (seq == expect) {
201 		/* TODO check for ifs handling in firmware */
202 		if (reason == IEEE802154_SUCCESS)
203 			ieee802154_xmit_complete(atusb->hw, atusb->tx_skb, false);
204 		else
205 			ieee802154_xmit_error(atusb->hw, atusb->tx_skb, reason);
206 	} else {
207 		/* TODO I experience this case when atusb has a tx complete
208 		 * irq before probing, we should fix the firmware it's an
209 		 * unlikely case now that seq == expect is then true, but can
210 		 * happen and fail with a tx_skb = NULL;
211 		 */
212 		ieee802154_xmit_hw_error(atusb->hw, atusb->tx_skb);
213 	}
214 }
215 
atusb_in_good(struct urb * urb)216 static void atusb_in_good(struct urb *urb)
217 {
218 	struct usb_device *usb_dev = urb->dev;
219 	struct sk_buff *skb = urb->context;
220 	struct atusb *atusb = SKB_ATUSB(skb);
221 	int result = IEEE802154_SUCCESS;
222 	u8 len, lqi, trac;
223 
224 	if (!urb->actual_length) {
225 		dev_dbg(&usb_dev->dev, "atusb_in: zero-sized URB ?\n");
226 		return;
227 	}
228 
229 	len = *skb->data;
230 
231 	switch (urb->actual_length) {
232 	case 2:
233 		trac = TRAC_MASK(*(skb->data + 1));
234 		switch (trac) {
235 		case TRAC_SUCCESS:
236 		case TRAC_SUCCESS_DATA_PENDING:
237 			/* already IEEE802154_SUCCESS */
238 			break;
239 		case TRAC_CHANNEL_ACCESS_FAILURE:
240 			result = IEEE802154_CHANNEL_ACCESS_FAILURE;
241 			break;
242 		case TRAC_NO_ACK:
243 			result = IEEE802154_NO_ACK;
244 			break;
245 		default:
246 			result = IEEE802154_SYSTEM_ERROR;
247 		}
248 
249 		fallthrough;
250 	case 1:
251 		atusb_tx_done(atusb, len, result);
252 		return;
253 	}
254 
255 	if (len + 1 > urb->actual_length - 1) {
256 		dev_dbg(&usb_dev->dev, "atusb_in: frame len %d+1 > URB %u-1\n",
257 			len, urb->actual_length);
258 		return;
259 	}
260 
261 	if (!ieee802154_is_valid_psdu_len(len)) {
262 		dev_dbg(&usb_dev->dev, "atusb_in: frame corrupted\n");
263 		return;
264 	}
265 
266 	lqi = skb->data[len + 1];
267 	dev_dbg(&usb_dev->dev, "atusb_in: rx len %d lqi 0x%02x\n", len, lqi);
268 	skb_pull(skb, 1);	/* remove PHR */
269 	skb_trim(skb, len);	/* get payload only */
270 	ieee802154_rx_irqsafe(atusb->hw, skb, lqi);
271 	urb->context = NULL;	/* skb is gone */
272 }
273 
atusb_in(struct urb * urb)274 static void atusb_in(struct urb *urb)
275 {
276 	struct usb_device *usb_dev = urb->dev;
277 	struct sk_buff *skb = urb->context;
278 	struct atusb *atusb = SKB_ATUSB(skb);
279 
280 	dev_dbg(&usb_dev->dev, "%s: status %d len %d\n", __func__,
281 		urb->status, urb->actual_length);
282 	if (urb->status) {
283 		if (urb->status == -ENOENT) { /* being killed */
284 			kfree_skb(skb);
285 			urb->context = NULL;
286 			return;
287 		}
288 		dev_dbg(&usb_dev->dev, "%s: URB error %d\n", __func__, urb->status);
289 	} else {
290 		atusb_in_good(urb);
291 	}
292 
293 	usb_anchor_urb(urb, &atusb->idle_urbs);
294 	if (!atusb->shutdown)
295 		schedule_delayed_work(&atusb->work, 0);
296 }
297 
298 /* ----- URB allocation/deallocation --------------------------------------- */
299 
atusb_free_urbs(struct atusb * atusb)300 static void atusb_free_urbs(struct atusb *atusb)
301 {
302 	struct urb *urb;
303 
304 	while (1) {
305 		urb = usb_get_from_anchor(&atusb->idle_urbs);
306 		if (!urb)
307 			break;
308 		kfree_skb(urb->context);
309 		usb_free_urb(urb);
310 	}
311 }
312 
atusb_alloc_urbs(struct atusb * atusb,int n)313 static int atusb_alloc_urbs(struct atusb *atusb, int n)
314 {
315 	struct urb *urb;
316 
317 	while (n) {
318 		urb = usb_alloc_urb(0, GFP_KERNEL);
319 		if (!urb) {
320 			atusb_free_urbs(atusb);
321 			return -ENOMEM;
322 		}
323 		usb_anchor_urb(urb, &atusb->idle_urbs);
324 		usb_free_urb(urb);
325 		n--;
326 	}
327 	return 0;
328 }
329 
330 /* ----- IEEE 802.15.4 interface operations -------------------------------- */
331 
atusb_xmit_complete(struct urb * urb)332 static void atusb_xmit_complete(struct urb *urb)
333 {
334 	dev_dbg(&urb->dev->dev, "atusb_xmit urb completed");
335 }
336 
atusb_xmit(struct ieee802154_hw * hw,struct sk_buff * skb)337 static int atusb_xmit(struct ieee802154_hw *hw, struct sk_buff *skb)
338 {
339 	struct atusb *atusb = hw->priv;
340 	struct usb_device *usb_dev = atusb->usb_dev;
341 	int ret;
342 
343 	dev_dbg(&usb_dev->dev, "%s (%d)\n", __func__, skb->len);
344 	atusb->tx_skb = skb;
345 	atusb->tx_ack_seq++;
346 	atusb->tx_dr.wIndex = cpu_to_le16(atusb->tx_ack_seq);
347 	atusb->tx_dr.wLength = cpu_to_le16(skb->len);
348 
349 	usb_fill_control_urb(atusb->tx_urb, usb_dev,
350 			     usb_sndctrlpipe(usb_dev, 0),
351 			     (unsigned char *)&atusb->tx_dr, skb->data,
352 			     skb->len, atusb_xmit_complete, NULL);
353 	ret = usb_submit_urb(atusb->tx_urb, GFP_ATOMIC);
354 	dev_dbg(&usb_dev->dev, "%s done (%d)\n", __func__, ret);
355 	return ret;
356 }
357 
atusb_ed(struct ieee802154_hw * hw,u8 * level)358 static int atusb_ed(struct ieee802154_hw *hw, u8 *level)
359 {
360 	WARN_ON(!level);
361 	*level = 0xbe;
362 	return 0;
363 }
364 
atusb_set_hw_addr_filt(struct ieee802154_hw * hw,struct ieee802154_hw_addr_filt * filt,unsigned long changed)365 static int atusb_set_hw_addr_filt(struct ieee802154_hw *hw,
366 				  struct ieee802154_hw_addr_filt *filt,
367 				  unsigned long changed)
368 {
369 	struct atusb *atusb = hw->priv;
370 	struct device *dev = &atusb->usb_dev->dev;
371 
372 	if (changed & IEEE802154_AFILT_SADDR_CHANGED) {
373 		u16 addr = le16_to_cpu(filt->short_addr);
374 
375 		dev_vdbg(dev, "%s called for saddr\n", __func__);
376 		usb_control_msg_send(atusb->usb_dev, 0, ATUSB_REG_WRITE, ATUSB_REQ_TO_DEV,
377 				     addr, RG_SHORT_ADDR_0, NULL, 0, 1000, GFP_KERNEL);
378 
379 		usb_control_msg_send(atusb->usb_dev, 0, ATUSB_REG_WRITE, ATUSB_REQ_TO_DEV,
380 				     addr >> 8, RG_SHORT_ADDR_1, NULL, 0, 1000, GFP_KERNEL);
381 	}
382 
383 	if (changed & IEEE802154_AFILT_PANID_CHANGED) {
384 		u16 pan = le16_to_cpu(filt->pan_id);
385 
386 		dev_vdbg(dev, "%s called for pan id\n", __func__);
387 		usb_control_msg_send(atusb->usb_dev, 0, ATUSB_REG_WRITE, ATUSB_REQ_TO_DEV,
388 				     pan, RG_PAN_ID_0, NULL, 0, 1000, GFP_KERNEL);
389 
390 		usb_control_msg_send(atusb->usb_dev, 0, ATUSB_REG_WRITE, ATUSB_REQ_TO_DEV,
391 				     pan >> 8, RG_PAN_ID_1, NULL, 0, 1000, GFP_KERNEL);
392 	}
393 
394 	if (changed & IEEE802154_AFILT_IEEEADDR_CHANGED) {
395 		u8 i, addr[IEEE802154_EXTENDED_ADDR_LEN];
396 
397 		memcpy(addr, &filt->ieee_addr, IEEE802154_EXTENDED_ADDR_LEN);
398 		dev_vdbg(dev, "%s called for IEEE addr\n", __func__);
399 		for (i = 0; i < 8; i++)
400 			usb_control_msg_send(atusb->usb_dev, 0, ATUSB_REG_WRITE, ATUSB_REQ_TO_DEV,
401 					     addr[i], RG_IEEE_ADDR_0 + i, NULL, 0,
402 					     1000, GFP_KERNEL);
403 	}
404 
405 	if (changed & IEEE802154_AFILT_PANC_CHANGED) {
406 		dev_vdbg(dev, "%s called for panc change\n", __func__);
407 		if (filt->pan_coord)
408 			atusb_write_subreg(atusb, SR_AACK_I_AM_COORD, 1);
409 		else
410 			atusb_write_subreg(atusb, SR_AACK_I_AM_COORD, 0);
411 	}
412 
413 	return atusb_get_and_clear_error(atusb);
414 }
415 
atusb_start(struct ieee802154_hw * hw)416 static int atusb_start(struct ieee802154_hw *hw)
417 {
418 	struct atusb *atusb = hw->priv;
419 	struct usb_device *usb_dev = atusb->usb_dev;
420 	int ret;
421 
422 	dev_dbg(&usb_dev->dev, "%s\n", __func__);
423 	schedule_delayed_work(&atusb->work, 0);
424 	usb_control_msg_send(atusb->usb_dev, 0, ATUSB_RX_MODE, ATUSB_REQ_TO_DEV, 1, 0,
425 			     NULL, 0, 1000, GFP_KERNEL);
426 	ret = atusb_get_and_clear_error(atusb);
427 	if (ret < 0)
428 		usb_kill_anchored_urbs(&atusb->idle_urbs);
429 	return ret;
430 }
431 
atusb_stop(struct ieee802154_hw * hw)432 static void atusb_stop(struct ieee802154_hw *hw)
433 {
434 	struct atusb *atusb = hw->priv;
435 	struct usb_device *usb_dev = atusb->usb_dev;
436 
437 	dev_dbg(&usb_dev->dev, "%s\n", __func__);
438 	usb_kill_anchored_urbs(&atusb->idle_urbs);
439 	usb_control_msg_send(atusb->usb_dev, 0, ATUSB_RX_MODE, ATUSB_REQ_TO_DEV, 0, 0,
440 			     NULL, 0, 1000, GFP_KERNEL);
441 	atusb_get_and_clear_error(atusb);
442 }
443 
444 #define ATUSB_MAX_TX_POWERS 0xF
445 static const s32 atusb_powers[ATUSB_MAX_TX_POWERS + 1] = {
446 	300, 280, 230, 180, 130, 70, 0, -100, -200, -300, -400, -500, -700,
447 	-900, -1200, -1700,
448 };
449 
450 static int
atusb_txpower(struct ieee802154_hw * hw,s32 mbm)451 atusb_txpower(struct ieee802154_hw *hw, s32 mbm)
452 {
453 	struct atusb *atusb = hw->priv;
454 
455 	if (atusb->data)
456 		return atusb->data->set_txpower(hw, mbm);
457 	else
458 		return -ENOTSUPP;
459 }
460 
461 static int
atusb_set_txpower(struct ieee802154_hw * hw,s32 mbm)462 atusb_set_txpower(struct ieee802154_hw *hw, s32 mbm)
463 {
464 	struct atusb *atusb = hw->priv;
465 	u32 i;
466 
467 	for (i = 0; i < hw->phy->supported.tx_powers_size; i++) {
468 		if (hw->phy->supported.tx_powers[i] == mbm)
469 			return atusb_write_subreg(atusb, SR_TX_PWR_23X, i);
470 	}
471 
472 	return -EINVAL;
473 }
474 
475 static int
hulusb_set_txpower(struct ieee802154_hw * hw,s32 mbm)476 hulusb_set_txpower(struct ieee802154_hw *hw, s32 mbm)
477 {
478 	u32 i;
479 
480 	for (i = 0; i < hw->phy->supported.tx_powers_size; i++) {
481 		if (hw->phy->supported.tx_powers[i] == mbm)
482 			return atusb_write_subreg(hw->priv, SR_TX_PWR_212, i);
483 	}
484 
485 	return -EINVAL;
486 }
487 
488 #define ATUSB_MAX_ED_LEVELS 0xF
489 static const s32 atusb_ed_levels[ATUSB_MAX_ED_LEVELS + 1] = {
490 	-9100, -8900, -8700, -8500, -8300, -8100, -7900, -7700, -7500, -7300,
491 	-7100, -6900, -6700, -6500, -6300, -6100,
492 };
493 
494 #define AT86RF212_MAX_TX_POWERS 0x1F
495 static const s32 at86rf212_powers[AT86RF212_MAX_TX_POWERS + 1] = {
496 	500, 400, 300, 200, 100, 0, -100, -200, -300, -400, -500, -600, -700,
497 	-800, -900, -1000, -1100, -1200, -1300, -1400, -1500, -1600, -1700,
498 	-1800, -1900, -2000, -2100, -2200, -2300, -2400, -2500, -2600,
499 };
500 
501 #define AT86RF2XX_MAX_ED_LEVELS 0xF
502 static const s32 at86rf212_ed_levels_100[AT86RF2XX_MAX_ED_LEVELS + 1] = {
503 	-10000, -9800, -9600, -9400, -9200, -9000, -8800, -8600, -8400, -8200,
504 	-8000, -7800, -7600, -7400, -7200, -7000,
505 };
506 
507 static const s32 at86rf212_ed_levels_98[AT86RF2XX_MAX_ED_LEVELS + 1] = {
508 	-9800, -9600, -9400, -9200, -9000, -8800, -8600, -8400, -8200, -8000,
509 	-7800, -7600, -7400, -7200, -7000, -6800,
510 };
511 
512 static int
atusb_set_cca_mode(struct ieee802154_hw * hw,const struct wpan_phy_cca * cca)513 atusb_set_cca_mode(struct ieee802154_hw *hw, const struct wpan_phy_cca *cca)
514 {
515 	struct atusb *atusb = hw->priv;
516 	u8 val;
517 
518 	/* mapping 802.15.4 to driver spec */
519 	switch (cca->mode) {
520 	case NL802154_CCA_ENERGY:
521 		val = 1;
522 		break;
523 	case NL802154_CCA_CARRIER:
524 		val = 2;
525 		break;
526 	case NL802154_CCA_ENERGY_CARRIER:
527 		switch (cca->opt) {
528 		case NL802154_CCA_OPT_ENERGY_CARRIER_AND:
529 			val = 3;
530 			break;
531 		case NL802154_CCA_OPT_ENERGY_CARRIER_OR:
532 			val = 0;
533 			break;
534 		default:
535 			return -EINVAL;
536 		}
537 		break;
538 	default:
539 		return -EINVAL;
540 	}
541 
542 	return atusb_write_subreg(atusb, SR_CCA_MODE, val);
543 }
544 
hulusb_set_cca_ed_level(struct atusb * lp,int rssi_base_val)545 static int hulusb_set_cca_ed_level(struct atusb *lp, int rssi_base_val)
546 {
547 	int cca_ed_thres;
548 
549 	cca_ed_thres = atusb_read_subreg(lp, SR_CCA_ED_THRES);
550 	if (cca_ed_thres < 0)
551 		return cca_ed_thres;
552 
553 	switch (rssi_base_val) {
554 	case -98:
555 		lp->hw->phy->supported.cca_ed_levels = at86rf212_ed_levels_98;
556 		lp->hw->phy->supported.cca_ed_levels_size = ARRAY_SIZE(at86rf212_ed_levels_98);
557 		lp->hw->phy->cca_ed_level = at86rf212_ed_levels_98[cca_ed_thres];
558 		break;
559 	case -100:
560 		lp->hw->phy->supported.cca_ed_levels = at86rf212_ed_levels_100;
561 		lp->hw->phy->supported.cca_ed_levels_size = ARRAY_SIZE(at86rf212_ed_levels_100);
562 		lp->hw->phy->cca_ed_level = at86rf212_ed_levels_100[cca_ed_thres];
563 		break;
564 	default:
565 		WARN_ON(1);
566 	}
567 
568 	return 0;
569 }
570 
571 static int
atusb_set_cca_ed_level(struct ieee802154_hw * hw,s32 mbm)572 atusb_set_cca_ed_level(struct ieee802154_hw *hw, s32 mbm)
573 {
574 	struct atusb *atusb = hw->priv;
575 	u32 i;
576 
577 	for (i = 0; i < hw->phy->supported.cca_ed_levels_size; i++) {
578 		if (hw->phy->supported.cca_ed_levels[i] == mbm)
579 			return atusb_write_subreg(atusb, SR_CCA_ED_THRES, i);
580 	}
581 
582 	return -EINVAL;
583 }
584 
atusb_channel(struct ieee802154_hw * hw,u8 page,u8 channel)585 static int atusb_channel(struct ieee802154_hw *hw, u8 page, u8 channel)
586 {
587 	struct atusb *atusb = hw->priv;
588 	int ret = -ENOTSUPP;
589 
590 	if (atusb->data) {
591 		ret = atusb->data->set_channel(hw, page, channel);
592 		/* @@@ ugly synchronization */
593 		msleep(atusb->data->t_channel_switch);
594 	}
595 
596 	return ret;
597 }
598 
atusb_set_channel(struct ieee802154_hw * hw,u8 page,u8 channel)599 static int atusb_set_channel(struct ieee802154_hw *hw, u8 page, u8 channel)
600 {
601 	struct atusb *atusb = hw->priv;
602 	int ret;
603 
604 	ret = atusb_write_subreg(atusb, SR_CHANNEL, channel);
605 	if (ret < 0)
606 		return ret;
607 	return 0;
608 }
609 
hulusb_set_channel(struct ieee802154_hw * hw,u8 page,u8 channel)610 static int hulusb_set_channel(struct ieee802154_hw *hw, u8 page, u8 channel)
611 {
612 	int rc;
613 	int rssi_base_val;
614 
615 	struct atusb *lp = hw->priv;
616 
617 	if (channel == 0)
618 		rc = atusb_write_subreg(lp, SR_SUB_MODE, 0);
619 	else
620 		rc = atusb_write_subreg(lp, SR_SUB_MODE, 1);
621 	if (rc < 0)
622 		return rc;
623 
624 	if (page == 0) {
625 		rc = atusb_write_subreg(lp, SR_BPSK_QPSK, 0);
626 		rssi_base_val = -100;
627 	} else {
628 		rc = atusb_write_subreg(lp, SR_BPSK_QPSK, 1);
629 		rssi_base_val = -98;
630 	}
631 	if (rc < 0)
632 		return rc;
633 
634 	rc = hulusb_set_cca_ed_level(lp, rssi_base_val);
635 	if (rc < 0)
636 		return rc;
637 
638 	return atusb_write_subreg(lp, SR_CHANNEL, channel);
639 }
640 
641 static int
atusb_set_csma_params(struct ieee802154_hw * hw,u8 min_be,u8 max_be,u8 retries)642 atusb_set_csma_params(struct ieee802154_hw *hw, u8 min_be, u8 max_be, u8 retries)
643 {
644 	struct atusb *atusb = hw->priv;
645 	int ret;
646 
647 	ret = atusb_write_subreg(atusb, SR_MIN_BE, min_be);
648 	if (ret)
649 		return ret;
650 
651 	ret = atusb_write_subreg(atusb, SR_MAX_BE, max_be);
652 	if (ret)
653 		return ret;
654 
655 	return atusb_write_subreg(atusb, SR_MAX_CSMA_RETRIES, retries);
656 }
657 
658 static int
hulusb_set_lbt(struct ieee802154_hw * hw,bool on)659 hulusb_set_lbt(struct ieee802154_hw *hw, bool on)
660 {
661 	struct atusb *atusb = hw->priv;
662 
663 	return atusb_write_subreg(atusb, SR_CSMA_LBT_MODE, on);
664 }
665 
666 static int
atusb_set_frame_retries(struct ieee802154_hw * hw,s8 retries)667 atusb_set_frame_retries(struct ieee802154_hw *hw, s8 retries)
668 {
669 	struct atusb *atusb = hw->priv;
670 
671 	return atusb_write_subreg(atusb, SR_MAX_FRAME_RETRIES, retries);
672 }
673 
674 static int
atusb_set_promiscuous_mode(struct ieee802154_hw * hw,const bool on)675 atusb_set_promiscuous_mode(struct ieee802154_hw *hw, const bool on)
676 {
677 	struct atusb *atusb = hw->priv;
678 	int ret;
679 
680 	if (on) {
681 		ret = atusb_write_subreg(atusb, SR_AACK_DIS_ACK, 1);
682 		if (ret < 0)
683 			return ret;
684 
685 		ret = atusb_write_subreg(atusb, SR_AACK_PROM_MODE, 1);
686 		if (ret < 0)
687 			return ret;
688 	} else {
689 		ret = atusb_write_subreg(atusb, SR_AACK_PROM_MODE, 0);
690 		if (ret < 0)
691 			return ret;
692 
693 		ret = atusb_write_subreg(atusb, SR_AACK_DIS_ACK, 0);
694 		if (ret < 0)
695 			return ret;
696 	}
697 
698 	return 0;
699 }
700 
701 static struct atusb_chip_data atusb_chip_data = {
702 	.t_channel_switch = 1,
703 	.rssi_base_val = -91,
704 	.set_txpower = atusb_set_txpower,
705 	.set_channel = atusb_set_channel,
706 };
707 
708 static struct atusb_chip_data hulusb_chip_data = {
709 	.t_channel_switch = 11,
710 	.rssi_base_val = -100,
711 	.set_txpower = hulusb_set_txpower,
712 	.set_channel = hulusb_set_channel,
713 };
714 
715 static const struct ieee802154_ops atusb_ops = {
716 	.owner			= THIS_MODULE,
717 	.xmit_async		= atusb_xmit,
718 	.ed			= atusb_ed,
719 	.set_channel		= atusb_channel,
720 	.start			= atusb_start,
721 	.stop			= atusb_stop,
722 	.set_hw_addr_filt	= atusb_set_hw_addr_filt,
723 	.set_txpower		= atusb_txpower,
724 	.set_lbt		= hulusb_set_lbt,
725 	.set_cca_mode		= atusb_set_cca_mode,
726 	.set_cca_ed_level	= atusb_set_cca_ed_level,
727 	.set_csma_params	= atusb_set_csma_params,
728 	.set_frame_retries	= atusb_set_frame_retries,
729 	.set_promiscuous_mode	= atusb_set_promiscuous_mode,
730 };
731 
732 /* ----- Firmware and chip version information ----------------------------- */
733 
atusb_get_and_show_revision(struct atusb * atusb)734 static int atusb_get_and_show_revision(struct atusb *atusb)
735 {
736 	struct usb_device *usb_dev = atusb->usb_dev;
737 	char *hw_name;
738 	unsigned char buffer[3];
739 	int ret;
740 
741 	/* Get a couple of the ATMega Firmware values */
742 	ret = usb_control_msg_recv(atusb->usb_dev, 0, ATUSB_ID, ATUSB_REQ_FROM_DEV, 0, 0,
743 				   buffer, 3, 1000, GFP_KERNEL);
744 	if (!ret) {
745 		atusb->fw_ver_maj = buffer[0];
746 		atusb->fw_ver_min = buffer[1];
747 		atusb->fw_hw_type = buffer[2];
748 
749 		switch (atusb->fw_hw_type) {
750 		case ATUSB_HW_TYPE_100813:
751 		case ATUSB_HW_TYPE_101216:
752 		case ATUSB_HW_TYPE_110131:
753 			hw_name = "ATUSB";
754 			atusb->data = &atusb_chip_data;
755 			break;
756 		case ATUSB_HW_TYPE_RZUSB:
757 			hw_name = "RZUSB";
758 			atusb->data = &atusb_chip_data;
759 			break;
760 		case ATUSB_HW_TYPE_HULUSB:
761 			hw_name = "HULUSB";
762 			atusb->data = &hulusb_chip_data;
763 			break;
764 		default:
765 			hw_name = "UNKNOWN";
766 			atusb->err = -ENOTSUPP;
767 			ret = -ENOTSUPP;
768 			break;
769 		}
770 
771 		dev_info(&usb_dev->dev,
772 			 "Firmware: major: %u, minor: %u, hardware type: %s (%d)\n",
773 			 atusb->fw_ver_maj, atusb->fw_ver_min, hw_name,
774 			 atusb->fw_hw_type);
775 	}
776 	if (atusb->fw_ver_maj == 0 && atusb->fw_ver_min < 2) {
777 		dev_info(&usb_dev->dev,
778 			 "Firmware version (%u.%u) predates our first public release.",
779 			 atusb->fw_ver_maj, atusb->fw_ver_min);
780 		dev_info(&usb_dev->dev, "Please update to version 0.2 or newer");
781 	}
782 
783 	return ret;
784 }
785 
atusb_get_and_show_build(struct atusb * atusb)786 static int atusb_get_and_show_build(struct atusb *atusb)
787 {
788 	struct usb_device *usb_dev = atusb->usb_dev;
789 	char *build;
790 	int ret;
791 
792 	build = kmalloc(ATUSB_BUILD_SIZE + 1, GFP_KERNEL);
793 	if (!build)
794 		return -ENOMEM;
795 
796 	ret = usb_control_msg(atusb->usb_dev, usb_rcvctrlpipe(usb_dev, 0), ATUSB_BUILD,
797 			      ATUSB_REQ_FROM_DEV, 0, 0, build, ATUSB_BUILD_SIZE, 1000);
798 	if (ret >= 0) {
799 		build[ret] = 0;
800 		dev_info(&usb_dev->dev, "Firmware: build %s\n", build);
801 	}
802 
803 	kfree(build);
804 	return ret;
805 }
806 
atusb_get_and_conf_chip(struct atusb * atusb)807 static int atusb_get_and_conf_chip(struct atusb *atusb)
808 {
809 	struct usb_device *usb_dev = atusb->usb_dev;
810 	u8 man_id_0, man_id_1, part_num, version_num;
811 	const char *chip;
812 	struct ieee802154_hw *hw = atusb->hw;
813 	int ret;
814 
815 	ret = usb_control_msg_recv(usb_dev, 0, ATUSB_REG_READ, ATUSB_REQ_FROM_DEV,
816 				   0, RG_MAN_ID_0, &man_id_0, 1, 1000, GFP_KERNEL);
817 	if (ret < 0)
818 		return ret;
819 
820 	ret = usb_control_msg_recv(usb_dev, 0, ATUSB_REG_READ, ATUSB_REQ_FROM_DEV,
821 				   0, RG_MAN_ID_1, &man_id_1, 1, 1000, GFP_KERNEL);
822 	if (ret < 0)
823 		return ret;
824 
825 	ret = usb_control_msg_recv(usb_dev, 0, ATUSB_REG_READ, ATUSB_REQ_FROM_DEV,
826 				   0, RG_PART_NUM, &part_num, 1, 1000, GFP_KERNEL);
827 	if (ret < 0)
828 		return ret;
829 
830 	ret = usb_control_msg_recv(usb_dev, 0, ATUSB_REG_READ, ATUSB_REQ_FROM_DEV,
831 				   0, RG_VERSION_NUM, &version_num, 1, 1000, GFP_KERNEL);
832 	if (ret < 0)
833 		return ret;
834 
835 	hw->flags = IEEE802154_HW_TX_OMIT_CKSUM | IEEE802154_HW_AFILT |
836 		    IEEE802154_HW_PROMISCUOUS | IEEE802154_HW_CSMA_PARAMS;
837 
838 	hw->phy->flags = WPAN_PHY_FLAG_TXPOWER | WPAN_PHY_FLAG_CCA_ED_LEVEL |
839 			 WPAN_PHY_FLAG_CCA_MODE;
840 
841 	hw->phy->supported.cca_modes = BIT(NL802154_CCA_ENERGY) |
842 				       BIT(NL802154_CCA_CARRIER) |
843 				       BIT(NL802154_CCA_ENERGY_CARRIER);
844 	hw->phy->supported.cca_opts = BIT(NL802154_CCA_OPT_ENERGY_CARRIER_AND) |
845 				      BIT(NL802154_CCA_OPT_ENERGY_CARRIER_OR);
846 
847 	hw->phy->cca.mode = NL802154_CCA_ENERGY;
848 
849 	hw->phy->current_page = 0;
850 
851 	if ((man_id_1 << 8 | man_id_0) != ATUSB_JEDEC_ATMEL) {
852 		dev_err(&usb_dev->dev,
853 			"non-Atmel transceiver xxxx%02x%02x\n",
854 			man_id_1, man_id_0);
855 		goto fail;
856 	}
857 
858 	switch (part_num) {
859 	case 2:
860 		chip = "AT86RF230";
861 		atusb->hw->phy->supported.channels[0] = 0x7FFF800;
862 		atusb->hw->phy->current_channel = 11;	/* reset default */
863 		atusb->hw->phy->supported.tx_powers = atusb_powers;
864 		atusb->hw->phy->supported.tx_powers_size = ARRAY_SIZE(atusb_powers);
865 		hw->phy->supported.cca_ed_levels = atusb_ed_levels;
866 		hw->phy->supported.cca_ed_levels_size = ARRAY_SIZE(atusb_ed_levels);
867 		break;
868 	case 3:
869 		chip = "AT86RF231";
870 		atusb->hw->phy->supported.channels[0] = 0x7FFF800;
871 		atusb->hw->phy->current_channel = 11;	/* reset default */
872 		atusb->hw->phy->supported.tx_powers = atusb_powers;
873 		atusb->hw->phy->supported.tx_powers_size = ARRAY_SIZE(atusb_powers);
874 		hw->phy->supported.cca_ed_levels = atusb_ed_levels;
875 		hw->phy->supported.cca_ed_levels_size = ARRAY_SIZE(atusb_ed_levels);
876 		break;
877 	case 7:
878 		chip = "AT86RF212";
879 		atusb->hw->flags |= IEEE802154_HW_LBT;
880 		atusb->hw->phy->supported.channels[0] = 0x00007FF;
881 		atusb->hw->phy->supported.channels[2] = 0x00007FF;
882 		atusb->hw->phy->current_channel = 5;
883 		atusb->hw->phy->supported.lbt = NL802154_SUPPORTED_BOOL_BOTH;
884 		atusb->hw->phy->supported.tx_powers = at86rf212_powers;
885 		atusb->hw->phy->supported.tx_powers_size = ARRAY_SIZE(at86rf212_powers);
886 		atusb->hw->phy->supported.cca_ed_levels = at86rf212_ed_levels_100;
887 		atusb->hw->phy->supported.cca_ed_levels_size = ARRAY_SIZE(at86rf212_ed_levels_100);
888 		break;
889 	default:
890 		dev_err(&usb_dev->dev,
891 			"unexpected transceiver, part 0x%02x version 0x%02x\n",
892 			part_num, version_num);
893 		goto fail;
894 	}
895 
896 	hw->phy->transmit_power = hw->phy->supported.tx_powers[0];
897 	hw->phy->cca_ed_level = hw->phy->supported.cca_ed_levels[7];
898 
899 	dev_info(&usb_dev->dev, "ATUSB: %s version %d\n", chip, version_num);
900 
901 	return 0;
902 
903 fail:
904 	atusb->err = -ENODEV;
905 	return -ENODEV;
906 }
907 
atusb_set_extended_addr(struct atusb * atusb)908 static int atusb_set_extended_addr(struct atusb *atusb)
909 {
910 	struct usb_device *usb_dev = atusb->usb_dev;
911 	unsigned char buffer[IEEE802154_EXTENDED_ADDR_LEN];
912 	__le64 extended_addr;
913 	u64 addr;
914 	int ret;
915 
916 	/* Firmware versions before 0.3 do not support the EUI64_READ command.
917 	 * Just use a random address and be done.
918 	 */
919 	if (atusb->fw_ver_maj == 0 && atusb->fw_ver_min < 3) {
920 		ieee802154_random_extended_addr(&atusb->hw->phy->perm_extended_addr);
921 		return 0;
922 	}
923 
924 	/* Firmware is new enough so we fetch the address from EEPROM */
925 	ret = usb_control_msg_recv(atusb->usb_dev, 0, ATUSB_EUI64_READ, ATUSB_REQ_FROM_DEV, 0, 0,
926 				   buffer, IEEE802154_EXTENDED_ADDR_LEN, 1000, GFP_KERNEL);
927 	if (ret < 0) {
928 		dev_err(&usb_dev->dev, "failed to fetch extended address, random address set\n");
929 		ieee802154_random_extended_addr(&atusb->hw->phy->perm_extended_addr);
930 		return ret;
931 	}
932 
933 	memcpy(&extended_addr, buffer, IEEE802154_EXTENDED_ADDR_LEN);
934 	/* Check if read address is not empty and the unicast bit is set correctly */
935 	if (!ieee802154_is_valid_extended_unicast_addr(extended_addr)) {
936 		dev_info(&usb_dev->dev, "no permanent extended address found, random address set\n");
937 		ieee802154_random_extended_addr(&atusb->hw->phy->perm_extended_addr);
938 	} else {
939 		atusb->hw->phy->perm_extended_addr = extended_addr;
940 		addr = swab64((__force u64)atusb->hw->phy->perm_extended_addr);
941 		dev_info(&usb_dev->dev, "Read permanent extended address %8phC from device\n",
942 			 &addr);
943 	}
944 
945 	return ret;
946 }
947 
948 /* ----- Setup ------------------------------------------------------------- */
949 
atusb_probe(struct usb_interface * interface,const struct usb_device_id * id)950 static int atusb_probe(struct usb_interface *interface,
951 		       const struct usb_device_id *id)
952 {
953 	struct usb_device *usb_dev = interface_to_usbdev(interface);
954 	struct ieee802154_hw *hw;
955 	struct atusb *atusb = NULL;
956 	int ret = -ENOMEM;
957 
958 	hw = ieee802154_alloc_hw(sizeof(struct atusb), &atusb_ops);
959 	if (!hw)
960 		return -ENOMEM;
961 
962 	atusb = hw->priv;
963 	atusb->hw = hw;
964 	atusb->usb_dev = usb_get_dev(usb_dev);
965 	usb_set_intfdata(interface, atusb);
966 
967 	atusb->shutdown = 0;
968 	atusb->err = 0;
969 	INIT_DELAYED_WORK(&atusb->work, atusb_work_urbs);
970 	init_usb_anchor(&atusb->idle_urbs);
971 	init_usb_anchor(&atusb->rx_urbs);
972 
973 	if (atusb_alloc_urbs(atusb, ATUSB_NUM_RX_URBS))
974 		goto fail;
975 
976 	atusb->tx_dr.bRequestType = ATUSB_REQ_TO_DEV;
977 	atusb->tx_dr.bRequest = ATUSB_TX;
978 	atusb->tx_dr.wValue = cpu_to_le16(0);
979 
980 	atusb->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
981 	if (!atusb->tx_urb)
982 		goto fail;
983 
984 	hw->parent = &usb_dev->dev;
985 
986 	usb_control_msg_send(atusb->usb_dev, 0, ATUSB_RF_RESET, ATUSB_REQ_TO_DEV, 0, 0,
987 			     NULL, 0, 1000, GFP_KERNEL);
988 	atusb_get_and_conf_chip(atusb);
989 	atusb_get_and_show_revision(atusb);
990 	atusb_get_and_show_build(atusb);
991 	atusb_set_extended_addr(atusb);
992 
993 	if ((atusb->fw_ver_maj == 0 && atusb->fw_ver_min >= 3) || atusb->fw_ver_maj > 0)
994 		hw->flags |= IEEE802154_HW_FRAME_RETRIES;
995 
996 	ret = atusb_get_and_clear_error(atusb);
997 	if (ret) {
998 		dev_err(&atusb->usb_dev->dev,
999 			"%s: initialization failed, error = %d\n",
1000 			__func__, ret);
1001 		goto fail;
1002 	}
1003 
1004 	ret = ieee802154_register_hw(hw);
1005 	if (ret)
1006 		goto fail;
1007 
1008 	/* If we just powered on, we're now in P_ON and need to enter TRX_OFF
1009 	 * explicitly. Any resets after that will send us straight to TRX_OFF,
1010 	 * making the command below redundant.
1011 	 */
1012 	usb_control_msg_send(atusb->usb_dev, 0, ATUSB_REG_WRITE, ATUSB_REQ_TO_DEV,
1013 			     STATE_FORCE_TRX_OFF, RG_TRX_STATE, NULL, 0, 1000, GFP_KERNEL);
1014 
1015 	msleep(1);	/* reset => TRX_OFF, tTR13 = 37 us */
1016 
1017 #if 0
1018 	/* Calculating the maximum time available to empty the frame buffer
1019 	 * on reception:
1020 	 *
1021 	 * According to [1], the inter-frame gap is
1022 	 * R * 20 * 16 us + 128 us
1023 	 * where R is a random number from 0 to 7. Furthermore, we have 20 bit
1024 	 * times (80 us at 250 kbps) of SHR of the next frame before the
1025 	 * transceiver begins storing data in the frame buffer.
1026 	 *
1027 	 * This yields a minimum time of 208 us between the last data of a
1028 	 * frame and the first data of the next frame. This time is further
1029 	 * reduced by interrupt latency in the atusb firmware.
1030 	 *
1031 	 * atusb currently needs about 500 us to retrieve a maximum-sized
1032 	 * frame. We therefore have to allow reception of a new frame to begin
1033 	 * while we retrieve the previous frame.
1034 	 *
1035 	 * [1] "JN-AN-1035 Calculating data rates in an IEEE 802.15.4-based
1036 	 *      network", Jennic 2006.
1037 	 *     http://www.jennic.com/download_file.php?supportFile=JN-AN-1035%20Calculating%20802-15-4%20Data%20Rates-1v0.pdf
1038 	 */
1039 
1040 	atusb_write_subreg(atusb, SR_RX_SAFE_MODE, 1);
1041 #endif
1042 	usb_control_msg_send(atusb->usb_dev, 0, ATUSB_REG_WRITE, ATUSB_REQ_TO_DEV,
1043 			     0xff, RG_IRQ_MASK, NULL, 0, 1000, GFP_KERNEL);
1044 
1045 	ret = atusb_get_and_clear_error(atusb);
1046 	if (!ret)
1047 		return 0;
1048 
1049 	dev_err(&atusb->usb_dev->dev,
1050 		"%s: setup failed, error = %d\n",
1051 		__func__, ret);
1052 
1053 	ieee802154_unregister_hw(hw);
1054 fail:
1055 	atusb_free_urbs(atusb);
1056 	usb_kill_urb(atusb->tx_urb);
1057 	usb_free_urb(atusb->tx_urb);
1058 	usb_put_dev(usb_dev);
1059 	ieee802154_free_hw(hw);
1060 	return ret;
1061 }
1062 
atusb_disconnect(struct usb_interface * interface)1063 static void atusb_disconnect(struct usb_interface *interface)
1064 {
1065 	struct atusb *atusb = usb_get_intfdata(interface);
1066 
1067 	dev_dbg(&atusb->usb_dev->dev, "%s\n", __func__);
1068 
1069 	atusb->shutdown = 1;
1070 	cancel_delayed_work_sync(&atusb->work);
1071 
1072 	usb_kill_anchored_urbs(&atusb->rx_urbs);
1073 	atusb_free_urbs(atusb);
1074 	usb_kill_urb(atusb->tx_urb);
1075 	usb_free_urb(atusb->tx_urb);
1076 
1077 	ieee802154_unregister_hw(atusb->hw);
1078 
1079 	usb_put_dev(atusb->usb_dev);
1080 
1081 	ieee802154_free_hw(atusb->hw);
1082 
1083 	usb_set_intfdata(interface, NULL);
1084 
1085 	pr_debug("%s done\n", __func__);
1086 }
1087 
1088 /* The devices we work with */
1089 static const struct usb_device_id atusb_device_table[] = {
1090 	{
1091 		.match_flags		= USB_DEVICE_ID_MATCH_DEVICE |
1092 					  USB_DEVICE_ID_MATCH_INT_INFO,
1093 		.idVendor		= ATUSB_VENDOR_ID,
1094 		.idProduct		= ATUSB_PRODUCT_ID,
1095 		.bInterfaceClass	= USB_CLASS_VENDOR_SPEC
1096 	},
1097 	/* end with null element */
1098 	{}
1099 };
1100 MODULE_DEVICE_TABLE(usb, atusb_device_table);
1101 
1102 static struct usb_driver atusb_driver = {
1103 	.name		= "atusb",
1104 	.probe		= atusb_probe,
1105 	.disconnect	= atusb_disconnect,
1106 	.id_table	= atusb_device_table,
1107 };
1108 module_usb_driver(atusb_driver);
1109 
1110 MODULE_AUTHOR("Alexander Aring <alex.aring@gmail.com>");
1111 MODULE_AUTHOR("Richard Sharpe <realrichardsharpe@gmail.com>");
1112 MODULE_AUTHOR("Stefan Schmidt <stefan@datenfreihafen.org>");
1113 MODULE_AUTHOR("Werner Almesberger <werner@almesberger.net>");
1114 MODULE_AUTHOR("Josef Filzmaier <j.filzmaier@gmx.at>");
1115 MODULE_DESCRIPTION("ATUSB IEEE 802.15.4 Driver");
1116 MODULE_LICENSE("GPL");
1117