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7490b008 AA |
1 | /* |
2 | * atusb.c - Driver for the ATUSB IEEE 802.15.4 dongle | |
3 | * | |
4 | * Written 2013 by Werner Almesberger <werner@almesberger.net> | |
5 | * | |
151c37bc SS |
6 | * Copyright (c) 2015 - 2016 Stefan Schmidt <stefan@datenfreihafen.org> |
7 | * | |
7490b008 AA |
8 | * This program is free software; you can redistribute it and/or |
9 | * modify it under the terms of the GNU General Public License as | |
10 | * published by the Free Software Foundation, version 2 | |
11 | * | |
12 | * Based on at86rf230.c and spi_atusb.c. | |
13 | * at86rf230.c is | |
14 | * Copyright (C) 2009 Siemens AG | |
15 | * Written by: Dmitry Eremin-Solenikov <dmitry.baryshkov@siemens.com> | |
16 | * | |
17 | * spi_atusb.c is | |
18 | * Copyright (c) 2011 Richard Sharpe <realrichardsharpe@gmail.com> | |
19 | * Copyright (c) 2011 Stefan Schmidt <stefan@datenfreihafen.org> | |
20 | * Copyright (c) 2011 Werner Almesberger <werner@almesberger.net> | |
21 | * | |
22 | * USB initialization is | |
23 | * Copyright (c) 2013 Alexander Aring <alex.aring@gmail.com> | |
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 | int shutdown; /* non-zero if shutting down */ | |
49 | int err; /* set by first error */ | |
50 | ||
51 | /* RX variables */ | |
52 | struct delayed_work work; /* memory allocations */ | |
53 | struct usb_anchor idle_urbs; /* URBs waiting to be submitted */ | |
54 | struct usb_anchor rx_urbs; /* URBs waiting for reception */ | |
55 | ||
56 | /* TX variables */ | |
57 | struct usb_ctrlrequest tx_dr; | |
58 | struct urb *tx_urb; | |
59 | struct sk_buff *tx_skb; | |
60 | uint8_t tx_ack_seq; /* current TX ACK sequence number */ | |
61 | }; | |
62 | ||
7490b008 AA |
63 | /* ----- USB commands without data ----------------------------------------- */ |
64 | ||
65 | /* To reduce the number of error checks in the code, we record the first error | |
66 | * in atusb->err and reject all subsequent requests until the error is cleared. | |
67 | */ | |
68 | ||
69 | static int atusb_control_msg(struct atusb *atusb, unsigned int pipe, | |
70 | __u8 request, __u8 requesttype, | |
71 | __u16 value, __u16 index, | |
72 | void *data, __u16 size, int timeout) | |
73 | { | |
74 | struct usb_device *usb_dev = atusb->usb_dev; | |
75 | int ret; | |
76 | ||
77 | if (atusb->err) | |
78 | return atusb->err; | |
79 | ||
80 | ret = usb_control_msg(usb_dev, pipe, request, requesttype, | |
81 | value, index, data, size, timeout); | |
82 | if (ret < 0) { | |
83 | atusb->err = ret; | |
84 | dev_err(&usb_dev->dev, | |
85 | "atusb_control_msg: req 0x%02x val 0x%x idx 0x%x, error %d\n", | |
86 | request, value, index, ret); | |
87 | } | |
88 | return ret; | |
89 | } | |
90 | ||
91 | static int atusb_command(struct atusb *atusb, uint8_t cmd, uint8_t arg) | |
92 | { | |
93 | struct usb_device *usb_dev = atusb->usb_dev; | |
94 | ||
95 | dev_dbg(&usb_dev->dev, "atusb_command: cmd = 0x%x\n", cmd); | |
96 | return atusb_control_msg(atusb, usb_sndctrlpipe(usb_dev, 0), | |
97 | cmd, ATUSB_REQ_TO_DEV, arg, 0, NULL, 0, 1000); | |
98 | } | |
99 | ||
100 | static int atusb_write_reg(struct atusb *atusb, uint8_t reg, uint8_t value) | |
101 | { | |
102 | struct usb_device *usb_dev = atusb->usb_dev; | |
103 | ||
104 | dev_dbg(&usb_dev->dev, "atusb_write_reg: 0x%02x <- 0x%02x\n", | |
105 | reg, value); | |
106 | return atusb_control_msg(atusb, usb_sndctrlpipe(usb_dev, 0), | |
107 | ATUSB_REG_WRITE, ATUSB_REQ_TO_DEV, | |
108 | value, reg, NULL, 0, 1000); | |
109 | } | |
110 | ||
111 | static int atusb_read_reg(struct atusb *atusb, uint8_t reg) | |
112 | { | |
113 | struct usb_device *usb_dev = atusb->usb_dev; | |
114 | int ret; | |
115 | uint8_t value; | |
116 | ||
117 | dev_dbg(&usb_dev->dev, "atusb: reg = 0x%x\n", reg); | |
118 | ret = atusb_control_msg(atusb, usb_rcvctrlpipe(usb_dev, 0), | |
119 | ATUSB_REG_READ, ATUSB_REQ_FROM_DEV, | |
120 | 0, reg, &value, 1, 1000); | |
121 | return ret >= 0 ? value : ret; | |
122 | } | |
123 | ||
bdc78737 SS |
124 | static int atusb_write_subreg(struct atusb *atusb, uint8_t reg, uint8_t mask, |
125 | uint8_t shift, uint8_t value) | |
126 | { | |
127 | struct usb_device *usb_dev = atusb->usb_dev; | |
128 | uint8_t orig, tmp; | |
129 | int ret = 0; | |
130 | ||
131 | dev_dbg(&usb_dev->dev, "atusb_write_subreg: 0x%02x <- 0x%02x\n", | |
132 | reg, value); | |
133 | ||
134 | orig = atusb_read_reg(atusb, reg); | |
135 | ||
136 | /* Write the value only into that part of the register which is allowed | |
137 | * by the mask. All other bits stay as before. | |
138 | */ | |
139 | tmp = orig & ~mask; | |
140 | tmp |= (value << shift) & mask; | |
141 | ||
142 | if (tmp != orig) | |
143 | ret = atusb_write_reg(atusb, reg, tmp); | |
144 | ||
145 | return ret; | |
146 | } | |
147 | ||
7490b008 AA |
148 | static int atusb_get_and_clear_error(struct atusb *atusb) |
149 | { | |
150 | int err = atusb->err; | |
151 | ||
152 | atusb->err = 0; | |
153 | return err; | |
154 | } | |
155 | ||
156 | /* ----- skb allocation ---------------------------------------------------- */ | |
157 | ||
158 | #define MAX_PSDU 127 | |
159 | #define MAX_RX_XFER (1 + MAX_PSDU + 2 + 1) /* PHR+PSDU+CRC+LQI */ | |
160 | ||
161 | #define SKB_ATUSB(skb) (*(struct atusb **)(skb)->cb) | |
162 | ||
163 | static void atusb_in(struct urb *urb); | |
164 | ||
165 | static int atusb_submit_rx_urb(struct atusb *atusb, struct urb *urb) | |
166 | { | |
167 | struct usb_device *usb_dev = atusb->usb_dev; | |
168 | struct sk_buff *skb = urb->context; | |
169 | int ret; | |
170 | ||
171 | if (!skb) { | |
172 | skb = alloc_skb(MAX_RX_XFER, GFP_KERNEL); | |
173 | if (!skb) { | |
174 | dev_warn_ratelimited(&usb_dev->dev, | |
175 | "atusb_in: can't allocate skb\n"); | |
176 | return -ENOMEM; | |
177 | } | |
178 | skb_put(skb, MAX_RX_XFER); | |
179 | SKB_ATUSB(skb) = atusb; | |
180 | } | |
181 | ||
182 | usb_fill_bulk_urb(urb, usb_dev, usb_rcvbulkpipe(usb_dev, 1), | |
183 | skb->data, MAX_RX_XFER, atusb_in, skb); | |
184 | usb_anchor_urb(urb, &atusb->rx_urbs); | |
185 | ||
186 | ret = usb_submit_urb(urb, GFP_KERNEL); | |
187 | if (ret) { | |
188 | usb_unanchor_urb(urb); | |
189 | kfree_skb(skb); | |
190 | urb->context = NULL; | |
191 | } | |
192 | return ret; | |
193 | } | |
194 | ||
195 | static void atusb_work_urbs(struct work_struct *work) | |
196 | { | |
197 | struct atusb *atusb = | |
198 | container_of(to_delayed_work(work), struct atusb, work); | |
199 | struct usb_device *usb_dev = atusb->usb_dev; | |
200 | struct urb *urb; | |
201 | int ret; | |
202 | ||
203 | if (atusb->shutdown) | |
204 | return; | |
205 | ||
206 | do { | |
207 | urb = usb_get_from_anchor(&atusb->idle_urbs); | |
208 | if (!urb) | |
209 | return; | |
210 | ret = atusb_submit_rx_urb(atusb, urb); | |
211 | } while (!ret); | |
212 | ||
213 | usb_anchor_urb(urb, &atusb->idle_urbs); | |
214 | dev_warn_ratelimited(&usb_dev->dev, | |
215 | "atusb_in: can't allocate/submit URB (%d)\n", ret); | |
216 | schedule_delayed_work(&atusb->work, | |
217 | msecs_to_jiffies(ATUSB_ALLOC_DELAY_MS) + 1); | |
218 | } | |
219 | ||
220 | /* ----- Asynchronous USB -------------------------------------------------- */ | |
221 | ||
222 | static void atusb_tx_done(struct atusb *atusb, uint8_t seq) | |
223 | { | |
224 | struct usb_device *usb_dev = atusb->usb_dev; | |
225 | uint8_t expect = atusb->tx_ack_seq; | |
226 | ||
227 | dev_dbg(&usb_dev->dev, "atusb_tx_done (0x%02x/0x%02x)\n", seq, expect); | |
228 | if (seq == expect) { | |
229 | /* TODO check for ifs handling in firmware */ | |
230 | ieee802154_xmit_complete(atusb->hw, atusb->tx_skb, false); | |
231 | } else { | |
232 | /* TODO I experience this case when atusb has a tx complete | |
233 | * irq before probing, we should fix the firmware it's an | |
234 | * unlikely case now that seq == expect is then true, but can | |
235 | * happen and fail with a tx_skb = NULL; | |
236 | */ | |
237 | ieee802154_wake_queue(atusb->hw); | |
238 | if (atusb->tx_skb) | |
239 | dev_kfree_skb_irq(atusb->tx_skb); | |
240 | } | |
241 | } | |
242 | ||
243 | static void atusb_in_good(struct urb *urb) | |
244 | { | |
245 | struct usb_device *usb_dev = urb->dev; | |
246 | struct sk_buff *skb = urb->context; | |
247 | struct atusb *atusb = SKB_ATUSB(skb); | |
248 | uint8_t len, lqi; | |
249 | ||
250 | if (!urb->actual_length) { | |
251 | dev_dbg(&usb_dev->dev, "atusb_in: zero-sized URB ?\n"); | |
252 | return; | |
253 | } | |
254 | ||
255 | len = *skb->data; | |
256 | ||
257 | if (urb->actual_length == 1) { | |
258 | atusb_tx_done(atusb, len); | |
259 | return; | |
260 | } | |
261 | ||
262 | if (len + 1 > urb->actual_length - 1) { | |
263 | dev_dbg(&usb_dev->dev, "atusb_in: frame len %d+1 > URB %u-1\n", | |
264 | len, urb->actual_length); | |
265 | return; | |
266 | } | |
267 | ||
268 | if (!ieee802154_is_valid_psdu_len(len)) { | |
269 | dev_dbg(&usb_dev->dev, "atusb_in: frame corrupted\n"); | |
270 | return; | |
271 | } | |
272 | ||
273 | lqi = skb->data[len + 1]; | |
274 | dev_dbg(&usb_dev->dev, "atusb_in: rx len %d lqi 0x%02x\n", len, lqi); | |
275 | skb_pull(skb, 1); /* remove PHR */ | |
276 | skb_trim(skb, len); /* get payload only */ | |
277 | ieee802154_rx_irqsafe(atusb->hw, skb, lqi); | |
278 | urb->context = NULL; /* skb is gone */ | |
279 | } | |
280 | ||
281 | static void atusb_in(struct urb *urb) | |
282 | { | |
283 | struct usb_device *usb_dev = urb->dev; | |
284 | struct sk_buff *skb = urb->context; | |
285 | struct atusb *atusb = SKB_ATUSB(skb); | |
286 | ||
287 | dev_dbg(&usb_dev->dev, "atusb_in: status %d len %d\n", | |
288 | urb->status, urb->actual_length); | |
289 | if (urb->status) { | |
290 | if (urb->status == -ENOENT) { /* being killed */ | |
291 | kfree_skb(skb); | |
292 | urb->context = NULL; | |
293 | return; | |
294 | } | |
295 | dev_dbg(&usb_dev->dev, "atusb_in: URB error %d\n", urb->status); | |
296 | } else { | |
297 | atusb_in_good(urb); | |
298 | } | |
299 | ||
300 | usb_anchor_urb(urb, &atusb->idle_urbs); | |
301 | if (!atusb->shutdown) | |
302 | schedule_delayed_work(&atusb->work, 0); | |
303 | } | |
304 | ||
305 | /* ----- URB allocation/deallocation --------------------------------------- */ | |
306 | ||
307 | static void atusb_free_urbs(struct atusb *atusb) | |
308 | { | |
309 | struct urb *urb; | |
310 | ||
311 | while (1) { | |
312 | urb = usb_get_from_anchor(&atusb->idle_urbs); | |
313 | if (!urb) | |
314 | break; | |
41881465 | 315 | kfree_skb(urb->context); |
7490b008 AA |
316 | usb_free_urb(urb); |
317 | } | |
318 | } | |
319 | ||
320 | static int atusb_alloc_urbs(struct atusb *atusb, int n) | |
321 | { | |
322 | struct urb *urb; | |
323 | ||
324 | while (n) { | |
325 | urb = usb_alloc_urb(0, GFP_KERNEL); | |
326 | if (!urb) { | |
327 | atusb_free_urbs(atusb); | |
328 | return -ENOMEM; | |
329 | } | |
330 | usb_anchor_urb(urb, &atusb->idle_urbs); | |
331 | n--; | |
332 | } | |
333 | return 0; | |
334 | } | |
335 | ||
336 | /* ----- IEEE 802.15.4 interface operations -------------------------------- */ | |
337 | ||
338 | static void atusb_xmit_complete(struct urb *urb) | |
339 | { | |
340 | dev_dbg(&urb->dev->dev, "atusb_xmit urb completed"); | |
341 | } | |
342 | ||
343 | static int atusb_xmit(struct ieee802154_hw *hw, struct sk_buff *skb) | |
344 | { | |
345 | struct atusb *atusb = hw->priv; | |
346 | struct usb_device *usb_dev = atusb->usb_dev; | |
347 | int ret; | |
348 | ||
349 | dev_dbg(&usb_dev->dev, "atusb_xmit (%d)\n", skb->len); | |
350 | atusb->tx_skb = skb; | |
351 | atusb->tx_ack_seq++; | |
352 | atusb->tx_dr.wIndex = cpu_to_le16(atusb->tx_ack_seq); | |
353 | atusb->tx_dr.wLength = cpu_to_le16(skb->len); | |
354 | ||
355 | usb_fill_control_urb(atusb->tx_urb, usb_dev, | |
356 | usb_sndctrlpipe(usb_dev, 0), | |
357 | (unsigned char *)&atusb->tx_dr, skb->data, | |
358 | skb->len, atusb_xmit_complete, NULL); | |
359 | ret = usb_submit_urb(atusb->tx_urb, GFP_ATOMIC); | |
360 | dev_dbg(&usb_dev->dev, "atusb_xmit done (%d)\n", ret); | |
361 | return ret; | |
362 | } | |
363 | ||
364 | static int atusb_channel(struct ieee802154_hw *hw, u8 page, u8 channel) | |
365 | { | |
366 | struct atusb *atusb = hw->priv; | |
367 | int ret; | |
368 | ||
38961294 | 369 | ret = atusb_write_subreg(atusb, SR_CHANNEL, channel); |
7490b008 AA |
370 | if (ret < 0) |
371 | return ret; | |
372 | msleep(1); /* @@@ ugly synchronization */ | |
373 | return 0; | |
374 | } | |
375 | ||
376 | static int atusb_ed(struct ieee802154_hw *hw, u8 *level) | |
377 | { | |
2d8cbd31 SS |
378 | BUG_ON(!level); |
379 | *level = 0xbe; | |
7490b008 AA |
380 | return 0; |
381 | } | |
382 | ||
383 | static int atusb_set_hw_addr_filt(struct ieee802154_hw *hw, | |
384 | struct ieee802154_hw_addr_filt *filt, | |
385 | unsigned long changed) | |
386 | { | |
387 | struct atusb *atusb = hw->priv; | |
388 | struct device *dev = &atusb->usb_dev->dev; | |
7490b008 AA |
389 | |
390 | if (changed & IEEE802154_AFILT_SADDR_CHANGED) { | |
391 | u16 addr = le16_to_cpu(filt->short_addr); | |
392 | ||
393 | dev_vdbg(dev, "atusb_set_hw_addr_filt called for saddr\n"); | |
394 | atusb_write_reg(atusb, RG_SHORT_ADDR_0, addr); | |
395 | atusb_write_reg(atusb, RG_SHORT_ADDR_1, addr >> 8); | |
396 | } | |
397 | ||
398 | if (changed & IEEE802154_AFILT_PANID_CHANGED) { | |
399 | u16 pan = le16_to_cpu(filt->pan_id); | |
400 | ||
401 | dev_vdbg(dev, "atusb_set_hw_addr_filt called for pan id\n"); | |
402 | atusb_write_reg(atusb, RG_PAN_ID_0, pan); | |
403 | atusb_write_reg(atusb, RG_PAN_ID_1, pan >> 8); | |
404 | } | |
405 | ||
406 | if (changed & IEEE802154_AFILT_IEEEADDR_CHANGED) { | |
407 | u8 i, addr[IEEE802154_EXTENDED_ADDR_LEN]; | |
408 | ||
409 | memcpy(addr, &filt->ieee_addr, IEEE802154_EXTENDED_ADDR_LEN); | |
410 | dev_vdbg(dev, "atusb_set_hw_addr_filt called for IEEE addr\n"); | |
411 | for (i = 0; i < 8; i++) | |
412 | atusb_write_reg(atusb, RG_IEEE_ADDR_0 + i, addr[i]); | |
413 | } | |
414 | ||
415 | if (changed & IEEE802154_AFILT_PANC_CHANGED) { | |
416 | dev_vdbg(dev, | |
417 | "atusb_set_hw_addr_filt called for panc change\n"); | |
7490b008 | 418 | if (filt->pan_coord) |
bdc78737 | 419 | atusb_write_subreg(atusb, SR_AACK_I_AM_COORD, 1); |
7490b008 | 420 | else |
bdc78737 | 421 | atusb_write_subreg(atusb, SR_AACK_I_AM_COORD, 0); |
7490b008 AA |
422 | } |
423 | ||
424 | return atusb_get_and_clear_error(atusb); | |
425 | } | |
426 | ||
427 | static int atusb_start(struct ieee802154_hw *hw) | |
428 | { | |
429 | struct atusb *atusb = hw->priv; | |
430 | struct usb_device *usb_dev = atusb->usb_dev; | |
431 | int ret; | |
432 | ||
433 | dev_dbg(&usb_dev->dev, "atusb_start\n"); | |
434 | schedule_delayed_work(&atusb->work, 0); | |
435 | atusb_command(atusb, ATUSB_RX_MODE, 1); | |
436 | ret = atusb_get_and_clear_error(atusb); | |
437 | if (ret < 0) | |
438 | usb_kill_anchored_urbs(&atusb->idle_urbs); | |
439 | return ret; | |
440 | } | |
441 | ||
442 | static void atusb_stop(struct ieee802154_hw *hw) | |
443 | { | |
444 | struct atusb *atusb = hw->priv; | |
445 | struct usb_device *usb_dev = atusb->usb_dev; | |
446 | ||
447 | dev_dbg(&usb_dev->dev, "atusb_stop\n"); | |
448 | usb_kill_anchored_urbs(&atusb->idle_urbs); | |
449 | atusb_command(atusb, ATUSB_RX_MODE, 0); | |
450 | atusb_get_and_clear_error(atusb); | |
451 | } | |
452 | ||
8702cb0f SS |
453 | #define ATUSB_MAX_TX_POWERS 0xF |
454 | static const s32 atusb_powers[ATUSB_MAX_TX_POWERS + 1] = { | |
455 | 300, 280, 230, 180, 130, 70, 0, -100, -200, -300, -400, -500, -700, | |
456 | -900, -1200, -1700, | |
457 | }; | |
458 | ||
459 | static int | |
460 | atusb_set_txpower(struct ieee802154_hw *hw, s32 mbm) | |
461 | { | |
462 | struct atusb *atusb = hw->priv; | |
463 | u32 i; | |
464 | ||
465 | for (i = 0; i < hw->phy->supported.tx_powers_size; i++) { | |
466 | if (hw->phy->supported.tx_powers[i] == mbm) | |
467 | return atusb_write_subreg(atusb, SR_TX_PWR_23X, i); | |
468 | } | |
469 | ||
470 | return -EINVAL; | |
471 | } | |
472 | ||
0f4715c8 SS |
473 | #define ATUSB_MAX_ED_LEVELS 0xF |
474 | static const s32 atusb_ed_levels[ATUSB_MAX_ED_LEVELS + 1] = { | |
475 | -9100, -8900, -8700, -8500, -8300, -8100, -7900, -7700, -7500, -7300, | |
476 | -7100, -6900, -6700, -6500, -6300, -6100, | |
477 | }; | |
478 | ||
308dbb7a SS |
479 | static int |
480 | atusb_set_cca_mode(struct ieee802154_hw *hw, const struct wpan_phy_cca *cca) | |
481 | { | |
482 | struct atusb *atusb = hw->priv; | |
483 | u8 val; | |
484 | ||
485 | /* mapping 802.15.4 to driver spec */ | |
486 | switch (cca->mode) { | |
487 | case NL802154_CCA_ENERGY: | |
488 | val = 1; | |
489 | break; | |
490 | case NL802154_CCA_CARRIER: | |
491 | val = 2; | |
492 | break; | |
493 | case NL802154_CCA_ENERGY_CARRIER: | |
494 | switch (cca->opt) { | |
495 | case NL802154_CCA_OPT_ENERGY_CARRIER_AND: | |
496 | val = 3; | |
497 | break; | |
498 | case NL802154_CCA_OPT_ENERGY_CARRIER_OR: | |
499 | val = 0; | |
500 | break; | |
501 | default: | |
502 | return -EINVAL; | |
503 | } | |
504 | break; | |
505 | default: | |
506 | return -EINVAL; | |
507 | } | |
508 | ||
509 | return atusb_write_subreg(atusb, SR_CCA_MODE, val); | |
510 | } | |
511 | ||
0f4715c8 SS |
512 | static int |
513 | atusb_set_cca_ed_level(struct ieee802154_hw *hw, s32 mbm) | |
514 | { | |
515 | struct atusb *atusb = hw->priv; | |
516 | u32 i; | |
517 | ||
518 | for (i = 0; i < hw->phy->supported.cca_ed_levels_size; i++) { | |
519 | if (hw->phy->supported.cca_ed_levels[i] == mbm) | |
520 | return atusb_write_subreg(atusb, SR_CCA_ED_THRES, i); | |
521 | } | |
522 | ||
523 | return -EINVAL; | |
524 | } | |
525 | ||
fb7c579a SS |
526 | static int |
527 | atusb_set_csma_params(struct ieee802154_hw *hw, u8 min_be, u8 max_be, u8 retries) | |
528 | { | |
529 | struct atusb *atusb = hw->priv; | |
530 | int ret; | |
531 | ||
532 | ret = atusb_write_subreg(atusb, SR_MIN_BE, min_be); | |
533 | if (ret) | |
534 | return ret; | |
535 | ||
536 | ret = atusb_write_subreg(atusb, SR_MAX_BE, max_be); | |
537 | if (ret) | |
538 | return ret; | |
539 | ||
540 | return atusb_write_subreg(atusb, SR_MAX_CSMA_RETRIES, retries); | |
541 | } | |
542 | ||
c61c9bd8 SS |
543 | static int |
544 | atusb_set_promiscuous_mode(struct ieee802154_hw *hw, const bool on) | |
545 | { | |
546 | struct atusb *atusb = hw->priv; | |
547 | int ret; | |
548 | ||
549 | if (on) { | |
550 | ret = atusb_write_subreg(atusb, SR_AACK_DIS_ACK, 1); | |
551 | if (ret < 0) | |
552 | return ret; | |
553 | ||
554 | ret = atusb_write_subreg(atusb, SR_AACK_PROM_MODE, 1); | |
555 | if (ret < 0) | |
556 | return ret; | |
557 | } else { | |
558 | ret = atusb_write_subreg(atusb, SR_AACK_PROM_MODE, 0); | |
559 | if (ret < 0) | |
560 | return ret; | |
561 | ||
562 | ret = atusb_write_subreg(atusb, SR_AACK_DIS_ACK, 0); | |
563 | if (ret < 0) | |
564 | return ret; | |
565 | } | |
566 | ||
567 | return 0; | |
568 | } | |
569 | ||
7490b008 AA |
570 | static struct ieee802154_ops atusb_ops = { |
571 | .owner = THIS_MODULE, | |
572 | .xmit_async = atusb_xmit, | |
573 | .ed = atusb_ed, | |
574 | .set_channel = atusb_channel, | |
575 | .start = atusb_start, | |
576 | .stop = atusb_stop, | |
577 | .set_hw_addr_filt = atusb_set_hw_addr_filt, | |
8702cb0f | 578 | .set_txpower = atusb_set_txpower, |
308dbb7a | 579 | .set_cca_mode = atusb_set_cca_mode, |
0f4715c8 | 580 | .set_cca_ed_level = atusb_set_cca_ed_level, |
fb7c579a | 581 | .set_csma_params = atusb_set_csma_params, |
c61c9bd8 | 582 | .set_promiscuous_mode = atusb_set_promiscuous_mode, |
7490b008 AA |
583 | }; |
584 | ||
585 | /* ----- Firmware and chip version information ----------------------------- */ | |
586 | ||
587 | static int atusb_get_and_show_revision(struct atusb *atusb) | |
588 | { | |
589 | struct usb_device *usb_dev = atusb->usb_dev; | |
590 | unsigned char buffer[3]; | |
591 | int ret; | |
592 | ||
593 | /* Get a couple of the ATMega Firmware values */ | |
594 | ret = atusb_control_msg(atusb, usb_rcvctrlpipe(usb_dev, 0), | |
595 | ATUSB_ID, ATUSB_REQ_FROM_DEV, 0, 0, | |
596 | buffer, 3, 1000); | |
597 | if (ret >= 0) | |
598 | dev_info(&usb_dev->dev, | |
599 | "Firmware: major: %u, minor: %u, hardware type: %u\n", | |
600 | buffer[0], buffer[1], buffer[2]); | |
33a238ae SS |
601 | if (buffer[0] == 0 && buffer[1] < 2) { |
602 | dev_info(&usb_dev->dev, | |
603 | "Firmware version (%u.%u) is predates our first public release.", | |
604 | buffer[0], buffer[1]); | |
605 | dev_info(&usb_dev->dev, "Please update to version 0.2 or newer"); | |
606 | } | |
7490b008 AA |
607 | |
608 | return ret; | |
609 | } | |
610 | ||
611 | static int atusb_get_and_show_build(struct atusb *atusb) | |
612 | { | |
613 | struct usb_device *usb_dev = atusb->usb_dev; | |
614 | char build[ATUSB_BUILD_SIZE + 1]; | |
615 | int ret; | |
616 | ||
617 | ret = atusb_control_msg(atusb, usb_rcvctrlpipe(usb_dev, 0), | |
618 | ATUSB_BUILD, ATUSB_REQ_FROM_DEV, 0, 0, | |
619 | build, ATUSB_BUILD_SIZE, 1000); | |
620 | if (ret >= 0) { | |
621 | build[ret] = 0; | |
622 | dev_info(&usb_dev->dev, "Firmware: build %s\n", build); | |
623 | } | |
624 | ||
625 | return ret; | |
626 | } | |
627 | ||
628 | static int atusb_get_and_show_chip(struct atusb *atusb) | |
629 | { | |
630 | struct usb_device *usb_dev = atusb->usb_dev; | |
631 | uint8_t man_id_0, man_id_1, part_num, version_num; | |
9def9afd | 632 | const char *chip; |
7490b008 AA |
633 | |
634 | man_id_0 = atusb_read_reg(atusb, RG_MAN_ID_0); | |
635 | man_id_1 = atusb_read_reg(atusb, RG_MAN_ID_1); | |
636 | part_num = atusb_read_reg(atusb, RG_PART_NUM); | |
637 | version_num = atusb_read_reg(atusb, RG_VERSION_NUM); | |
638 | ||
639 | if (atusb->err) | |
640 | return atusb->err; | |
641 | ||
642 | if ((man_id_1 << 8 | man_id_0) != ATUSB_JEDEC_ATMEL) { | |
643 | dev_err(&usb_dev->dev, | |
644 | "non-Atmel transceiver xxxx%02x%02x\n", | |
645 | man_id_1, man_id_0); | |
646 | goto fail; | |
647 | } | |
9def9afd AA |
648 | |
649 | switch (part_num) { | |
650 | case 2: | |
651 | chip = "AT86RF230"; | |
652 | break; | |
653 | case 3: | |
654 | chip = "AT86RF231"; | |
655 | break; | |
656 | default: | |
7490b008 AA |
657 | dev_err(&usb_dev->dev, |
658 | "unexpected transceiver, part 0x%02x version 0x%02x\n", | |
659 | part_num, version_num); | |
660 | goto fail; | |
661 | } | |
662 | ||
9def9afd | 663 | dev_info(&usb_dev->dev, "ATUSB: %s version %d\n", chip, version_num); |
7490b008 AA |
664 | |
665 | return 0; | |
666 | ||
667 | fail: | |
668 | atusb->err = -ENODEV; | |
669 | return -ENODEV; | |
670 | } | |
671 | ||
672 | /* ----- Setup ------------------------------------------------------------- */ | |
673 | ||
674 | static int atusb_probe(struct usb_interface *interface, | |
675 | const struct usb_device_id *id) | |
676 | { | |
677 | struct usb_device *usb_dev = interface_to_usbdev(interface); | |
678 | struct ieee802154_hw *hw; | |
679 | struct atusb *atusb = NULL; | |
680 | int ret = -ENOMEM; | |
681 | ||
682 | hw = ieee802154_alloc_hw(sizeof(struct atusb), &atusb_ops); | |
683 | if (!hw) | |
684 | return -ENOMEM; | |
685 | ||
686 | atusb = hw->priv; | |
687 | atusb->hw = hw; | |
688 | atusb->usb_dev = usb_get_dev(usb_dev); | |
689 | usb_set_intfdata(interface, atusb); | |
690 | ||
691 | atusb->shutdown = 0; | |
692 | atusb->err = 0; | |
693 | INIT_DELAYED_WORK(&atusb->work, atusb_work_urbs); | |
694 | init_usb_anchor(&atusb->idle_urbs); | |
695 | init_usb_anchor(&atusb->rx_urbs); | |
696 | ||
697 | if (atusb_alloc_urbs(atusb, ATUSB_NUM_RX_URBS)) | |
698 | goto fail; | |
699 | ||
700 | atusb->tx_dr.bRequestType = ATUSB_REQ_TO_DEV; | |
701 | atusb->tx_dr.bRequest = ATUSB_TX; | |
702 | atusb->tx_dr.wValue = cpu_to_le16(0); | |
703 | ||
704 | atusb->tx_urb = usb_alloc_urb(0, GFP_ATOMIC); | |
705 | if (!atusb->tx_urb) | |
706 | goto fail; | |
707 | ||
708 | hw->parent = &usb_dev->dev; | |
f1a71886 | 709 | hw->flags = IEEE802154_HW_TX_OMIT_CKSUM | IEEE802154_HW_AFILT | |
fb7c579a | 710 | IEEE802154_HW_PROMISCUOUS | IEEE802154_HW_CSMA_PARAMS; |
7490b008 | 711 | |
308dbb7a SS |
712 | hw->phy->flags = WPAN_PHY_FLAG_TXPOWER | WPAN_PHY_FLAG_CCA_ED_LEVEL | |
713 | WPAN_PHY_FLAG_CCA_MODE; | |
714 | ||
715 | hw->phy->supported.cca_modes = BIT(NL802154_CCA_ENERGY) | | |
716 | BIT(NL802154_CCA_CARRIER) | BIT(NL802154_CCA_ENERGY_CARRIER); | |
717 | hw->phy->supported.cca_opts = BIT(NL802154_CCA_OPT_ENERGY_CARRIER_AND) | | |
718 | BIT(NL802154_CCA_OPT_ENERGY_CARRIER_OR); | |
0f4715c8 SS |
719 | |
720 | hw->phy->supported.cca_ed_levels = atusb_ed_levels; | |
721 | hw->phy->supported.cca_ed_levels_size = ARRAY_SIZE(atusb_ed_levels); | |
8702cb0f | 722 | |
308dbb7a SS |
723 | hw->phy->cca.mode = NL802154_CCA_ENERGY; |
724 | ||
7490b008 AA |
725 | hw->phy->current_page = 0; |
726 | hw->phy->current_channel = 11; /* reset default */ | |
727 | hw->phy->supported.channels[0] = 0x7FFF800; | |
8702cb0f SS |
728 | hw->phy->supported.tx_powers = atusb_powers; |
729 | hw->phy->supported.tx_powers_size = ARRAY_SIZE(atusb_powers); | |
730 | hw->phy->transmit_power = hw->phy->supported.tx_powers[0]; | |
7490b008 | 731 | ieee802154_random_extended_addr(&hw->phy->perm_extended_addr); |
0f4715c8 | 732 | hw->phy->cca_ed_level = hw->phy->supported.cca_ed_levels[7]; |
7490b008 AA |
733 | |
734 | atusb_command(atusb, ATUSB_RF_RESET, 0); | |
735 | atusb_get_and_show_chip(atusb); | |
736 | atusb_get_and_show_revision(atusb); | |
737 | atusb_get_and_show_build(atusb); | |
738 | ret = atusb_get_and_clear_error(atusb); | |
739 | if (ret) { | |
740 | dev_err(&atusb->usb_dev->dev, | |
741 | "%s: initialization failed, error = %d\n", | |
742 | __func__, ret); | |
743 | goto fail; | |
744 | } | |
745 | ||
746 | ret = ieee802154_register_hw(hw); | |
747 | if (ret) | |
748 | goto fail; | |
749 | ||
750 | /* If we just powered on, we're now in P_ON and need to enter TRX_OFF | |
751 | * explicitly. Any resets after that will send us straight to TRX_OFF, | |
752 | * making the command below redundant. | |
753 | */ | |
754 | atusb_write_reg(atusb, RG_TRX_STATE, STATE_FORCE_TRX_OFF); | |
755 | msleep(1); /* reset => TRX_OFF, tTR13 = 37 us */ | |
756 | ||
757 | #if 0 | |
758 | /* Calculating the maximum time available to empty the frame buffer | |
759 | * on reception: | |
760 | * | |
761 | * According to [1], the inter-frame gap is | |
762 | * R * 20 * 16 us + 128 us | |
763 | * where R is a random number from 0 to 7. Furthermore, we have 20 bit | |
764 | * times (80 us at 250 kbps) of SHR of the next frame before the | |
765 | * transceiver begins storing data in the frame buffer. | |
766 | * | |
767 | * This yields a minimum time of 208 us between the last data of a | |
768 | * frame and the first data of the next frame. This time is further | |
769 | * reduced by interrupt latency in the atusb firmware. | |
770 | * | |
771 | * atusb currently needs about 500 us to retrieve a maximum-sized | |
772 | * frame. We therefore have to allow reception of a new frame to begin | |
773 | * while we retrieve the previous frame. | |
774 | * | |
775 | * [1] "JN-AN-1035 Calculating data rates in an IEEE 802.15.4-based | |
776 | * network", Jennic 2006. | |
777 | * http://www.jennic.com/download_file.php?supportFile=JN-AN-1035%20Calculating%20802-15-4%20Data%20Rates-1v0.pdf | |
778 | */ | |
779 | ||
bdc78737 | 780 | atusb_write_subreg(atusb, SR_RX_SAFE_MODE, 1); |
7490b008 AA |
781 | #endif |
782 | atusb_write_reg(atusb, RG_IRQ_MASK, 0xff); | |
783 | ||
784 | ret = atusb_get_and_clear_error(atusb); | |
785 | if (!ret) | |
786 | return 0; | |
787 | ||
788 | dev_err(&atusb->usb_dev->dev, | |
789 | "%s: setup failed, error = %d\n", | |
790 | __func__, ret); | |
791 | ||
792 | ieee802154_unregister_hw(hw); | |
793 | fail: | |
794 | atusb_free_urbs(atusb); | |
795 | usb_kill_urb(atusb->tx_urb); | |
796 | usb_free_urb(atusb->tx_urb); | |
797 | usb_put_dev(usb_dev); | |
798 | ieee802154_free_hw(hw); | |
799 | return ret; | |
800 | } | |
801 | ||
802 | static void atusb_disconnect(struct usb_interface *interface) | |
803 | { | |
804 | struct atusb *atusb = usb_get_intfdata(interface); | |
805 | ||
806 | dev_dbg(&atusb->usb_dev->dev, "atusb_disconnect\n"); | |
807 | ||
808 | atusb->shutdown = 1; | |
809 | cancel_delayed_work_sync(&atusb->work); | |
810 | ||
811 | usb_kill_anchored_urbs(&atusb->rx_urbs); | |
812 | atusb_free_urbs(atusb); | |
813 | usb_kill_urb(atusb->tx_urb); | |
814 | usb_free_urb(atusb->tx_urb); | |
815 | ||
816 | ieee802154_unregister_hw(atusb->hw); | |
817 | ||
818 | ieee802154_free_hw(atusb->hw); | |
819 | ||
820 | usb_set_intfdata(interface, NULL); | |
821 | usb_put_dev(atusb->usb_dev); | |
822 | ||
823 | pr_debug("atusb_disconnect done\n"); | |
824 | } | |
825 | ||
826 | /* The devices we work with */ | |
827 | static const struct usb_device_id atusb_device_table[] = { | |
828 | { | |
829 | .match_flags = USB_DEVICE_ID_MATCH_DEVICE | | |
830 | USB_DEVICE_ID_MATCH_INT_INFO, | |
831 | .idVendor = ATUSB_VENDOR_ID, | |
832 | .idProduct = ATUSB_PRODUCT_ID, | |
833 | .bInterfaceClass = USB_CLASS_VENDOR_SPEC | |
834 | }, | |
835 | /* end with null element */ | |
836 | {} | |
837 | }; | |
838 | MODULE_DEVICE_TABLE(usb, atusb_device_table); | |
839 | ||
840 | static struct usb_driver atusb_driver = { | |
841 | .name = "atusb", | |
842 | .probe = atusb_probe, | |
843 | .disconnect = atusb_disconnect, | |
844 | .id_table = atusb_device_table, | |
845 | }; | |
846 | module_usb_driver(atusb_driver); | |
847 | ||
848 | MODULE_AUTHOR("Alexander Aring <alex.aring@gmail.com>"); | |
849 | MODULE_AUTHOR("Richard Sharpe <realrichardsharpe@gmail.com>"); | |
850 | MODULE_AUTHOR("Stefan Schmidt <stefan@datenfreihafen.org>"); | |
851 | MODULE_AUTHOR("Werner Almesberger <werner@almesberger.net>"); | |
852 | MODULE_DESCRIPTION("ATUSB IEEE 802.15.4 Driver"); | |
853 | MODULE_LICENSE("GPL"); |