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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * AT86RF230/RF231 driver
4 *
5 * Copyright (C) 2009-2012 Siemens AG
6 *
7 * Written by:
8 * Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
9 * Alexander Smirnov <alex.bluesman.smirnov@gmail.com>
10 * Alexander Aring <aar@pengutronix.de>
11 */
12#include <linux/kernel.h>
13#include <linux/module.h>
14#include <linux/hrtimer.h>
15#include <linux/jiffies.h>
16#include <linux/interrupt.h>
17#include <linux/irq.h>
18#include <linux/gpio.h>
19#include <linux/delay.h>
20#include <linux/property.h>
21#include <linux/spi/spi.h>
22#include <linux/regmap.h>
23#include <linux/skbuff.h>
24#include <linux/of_gpio.h>
25#include <linux/ieee802154.h>
26
27#include <net/mac802154.h>
28#include <net/cfg802154.h>
29
30#include "at86rf230.h"
31
32struct at86rf230_local;
33/* at86rf2xx chip depend data.
34 * All timings are in us.
35 */
36struct at86rf2xx_chip_data {
37 u16 t_sleep_cycle;
38 u16 t_channel_switch;
39 u16 t_reset_to_off;
40 u16 t_off_to_aack;
41 u16 t_off_to_tx_on;
42 u16 t_off_to_sleep;
43 u16 t_sleep_to_off;
44 u16 t_frame;
45 u16 t_p_ack;
46 int rssi_base_val;
47
48 int (*set_channel)(struct at86rf230_local *, u8, u8);
49 int (*set_txpower)(struct at86rf230_local *, s32);
50};
51
52#define AT86RF2XX_MAX_BUF (127 + 3)
53/* tx retries to access the TX_ON state
54 * if it's above then force change will be started.
55 *
56 * We assume the max_frame_retries (7) value of 802.15.4 here.
57 */
58#define AT86RF2XX_MAX_TX_RETRIES 7
59/* We use the recommended 5 minutes timeout to recalibrate */
60#define AT86RF2XX_CAL_LOOP_TIMEOUT (5 * 60 * HZ)
61
62struct at86rf230_state_change {
63 struct at86rf230_local *lp;
64 int irq;
65
66 struct hrtimer timer;
67 struct spi_message msg;
68 struct spi_transfer trx;
69 u8 buf[AT86RF2XX_MAX_BUF];
70
71 void (*complete)(void *context);
72 u8 from_state;
73 u8 to_state;
74 int trac;
75
76 bool free;
77};
78
79struct at86rf230_local {
80 struct spi_device *spi;
81
82 struct ieee802154_hw *hw;
83 struct at86rf2xx_chip_data *data;
84 struct regmap *regmap;
85 struct gpio_desc *slp_tr;
86 bool sleep;
87
88 struct completion state_complete;
89 struct at86rf230_state_change state;
90
91 unsigned long cal_timeout;
92 bool is_tx;
93 bool is_tx_from_off;
94 bool was_tx;
95 u8 tx_retry;
96 struct sk_buff *tx_skb;
97 struct at86rf230_state_change tx;
98};
99
100#define AT86RF2XX_NUMREGS 0x3F
101
102static void
103at86rf230_async_state_change(struct at86rf230_local *lp,
104 struct at86rf230_state_change *ctx,
105 const u8 state, void (*complete)(void *context));
106
107static inline void
108at86rf230_sleep(struct at86rf230_local *lp)
109{
110 if (lp->slp_tr) {
111 gpiod_set_value(lp->slp_tr, 1);
112 usleep_range(lp->data->t_off_to_sleep,
113 lp->data->t_off_to_sleep + 10);
114 lp->sleep = true;
115 }
116}
117
118static inline void
119at86rf230_awake(struct at86rf230_local *lp)
120{
121 if (lp->slp_tr) {
122 gpiod_set_value(lp->slp_tr, 0);
123 usleep_range(lp->data->t_sleep_to_off,
124 lp->data->t_sleep_to_off + 100);
125 lp->sleep = false;
126 }
127}
128
129static inline int
130__at86rf230_write(struct at86rf230_local *lp,
131 unsigned int addr, unsigned int data)
132{
133 bool sleep = lp->sleep;
134 int ret;
135
136 /* awake for register setting if sleep */
137 if (sleep)
138 at86rf230_awake(lp);
139
140 ret = regmap_write(lp->regmap, addr, data);
141
142 /* sleep again if was sleeping */
143 if (sleep)
144 at86rf230_sleep(lp);
145
146 return ret;
147}
148
149static inline int
150__at86rf230_read(struct at86rf230_local *lp,
151 unsigned int addr, unsigned int *data)
152{
153 bool sleep = lp->sleep;
154 int ret;
155
156 /* awake for register setting if sleep */
157 if (sleep)
158 at86rf230_awake(lp);
159
160 ret = regmap_read(lp->regmap, addr, data);
161
162 /* sleep again if was sleeping */
163 if (sleep)
164 at86rf230_sleep(lp);
165
166 return ret;
167}
168
169static inline int
170at86rf230_read_subreg(struct at86rf230_local *lp,
171 unsigned int addr, unsigned int mask,
172 unsigned int shift, unsigned int *data)
173{
174 int rc;
175
176 rc = __at86rf230_read(lp, addr, data);
177 if (!rc)
178 *data = (*data & mask) >> shift;
179
180 return rc;
181}
182
183static inline int
184at86rf230_write_subreg(struct at86rf230_local *lp,
185 unsigned int addr, unsigned int mask,
186 unsigned int shift, unsigned int data)
187{
188 bool sleep = lp->sleep;
189 int ret;
190
191 /* awake for register setting if sleep */
192 if (sleep)
193 at86rf230_awake(lp);
194
195 ret = regmap_update_bits(lp->regmap, addr, mask, data << shift);
196
197 /* sleep again if was sleeping */
198 if (sleep)
199 at86rf230_sleep(lp);
200
201 return ret;
202}
203
204static inline void
205at86rf230_slp_tr_rising_edge(struct at86rf230_local *lp)
206{
207 gpiod_set_value(lp->slp_tr, 1);
208 udelay(1);
209 gpiod_set_value(lp->slp_tr, 0);
210}
211
212static bool
213at86rf230_reg_writeable(struct device *dev, unsigned int reg)
214{
215 switch (reg) {
216 case RG_TRX_STATE:
217 case RG_TRX_CTRL_0:
218 case RG_TRX_CTRL_1:
219 case RG_PHY_TX_PWR:
220 case RG_PHY_ED_LEVEL:
221 case RG_PHY_CC_CCA:
222 case RG_CCA_THRES:
223 case RG_RX_CTRL:
224 case RG_SFD_VALUE:
225 case RG_TRX_CTRL_2:
226 case RG_ANT_DIV:
227 case RG_IRQ_MASK:
228 case RG_VREG_CTRL:
229 case RG_BATMON:
230 case RG_XOSC_CTRL:
231 case RG_RX_SYN:
232 case RG_XAH_CTRL_1:
233 case RG_FTN_CTRL:
234 case RG_PLL_CF:
235 case RG_PLL_DCU:
236 case RG_SHORT_ADDR_0:
237 case RG_SHORT_ADDR_1:
238 case RG_PAN_ID_0:
239 case RG_PAN_ID_1:
240 case RG_IEEE_ADDR_0:
241 case RG_IEEE_ADDR_1:
242 case RG_IEEE_ADDR_2:
243 case RG_IEEE_ADDR_3:
244 case RG_IEEE_ADDR_4:
245 case RG_IEEE_ADDR_5:
246 case RG_IEEE_ADDR_6:
247 case RG_IEEE_ADDR_7:
248 case RG_XAH_CTRL_0:
249 case RG_CSMA_SEED_0:
250 case RG_CSMA_SEED_1:
251 case RG_CSMA_BE:
252 return true;
253 default:
254 return false;
255 }
256}
257
258static bool
259at86rf230_reg_readable(struct device *dev, unsigned int reg)
260{
261 bool rc;
262
263 /* all writeable are also readable */
264 rc = at86rf230_reg_writeable(dev, reg);
265 if (rc)
266 return rc;
267
268 /* readonly regs */
269 switch (reg) {
270 case RG_TRX_STATUS:
271 case RG_PHY_RSSI:
272 case RG_IRQ_STATUS:
273 case RG_PART_NUM:
274 case RG_VERSION_NUM:
275 case RG_MAN_ID_1:
276 case RG_MAN_ID_0:
277 return true;
278 default:
279 return false;
280 }
281}
282
283static bool
284at86rf230_reg_volatile(struct device *dev, unsigned int reg)
285{
286 /* can be changed during runtime */
287 switch (reg) {
288 case RG_TRX_STATUS:
289 case RG_TRX_STATE:
290 case RG_PHY_RSSI:
291 case RG_PHY_ED_LEVEL:
292 case RG_IRQ_STATUS:
293 case RG_VREG_CTRL:
294 case RG_PLL_CF:
295 case RG_PLL_DCU:
296 return true;
297 default:
298 return false;
299 }
300}
301
302static bool
303at86rf230_reg_precious(struct device *dev, unsigned int reg)
304{
305 /* don't clear irq line on read */
306 switch (reg) {
307 case RG_IRQ_STATUS:
308 return true;
309 default:
310 return false;
311 }
312}
313
314static const struct regmap_config at86rf230_regmap_spi_config = {
315 .reg_bits = 8,
316 .val_bits = 8,
317 .write_flag_mask = CMD_REG | CMD_WRITE,
318 .read_flag_mask = CMD_REG,
319 .cache_type = REGCACHE_RBTREE,
320 .max_register = AT86RF2XX_NUMREGS,
321 .writeable_reg = at86rf230_reg_writeable,
322 .readable_reg = at86rf230_reg_readable,
323 .volatile_reg = at86rf230_reg_volatile,
324 .precious_reg = at86rf230_reg_precious,
325};
326
327static void
328at86rf230_async_error_recover_complete(void *context)
329{
330 struct at86rf230_state_change *ctx = context;
331 struct at86rf230_local *lp = ctx->lp;
332
333 if (ctx->free)
334 kfree(ctx);
335
336 if (lp->was_tx) {
337 lp->was_tx = 0;
338 ieee802154_xmit_hw_error(lp->hw, lp->tx_skb);
339 }
340}
341
342static void
343at86rf230_async_error_recover(void *context)
344{
345 struct at86rf230_state_change *ctx = context;
346 struct at86rf230_local *lp = ctx->lp;
347
348 if (lp->is_tx) {
349 lp->was_tx = 1;
350 lp->is_tx = 0;
351 }
352
353 at86rf230_async_state_change(lp, ctx, STATE_RX_AACK_ON,
354 at86rf230_async_error_recover_complete);
355}
356
357static inline void
358at86rf230_async_error(struct at86rf230_local *lp,
359 struct at86rf230_state_change *ctx, int rc)
360{
361 dev_err(&lp->spi->dev, "spi_async error %d\n", rc);
362
363 at86rf230_async_state_change(lp, ctx, STATE_FORCE_TRX_OFF,
364 at86rf230_async_error_recover);
365}
366
367/* Generic function to get some register value in async mode */
368static void
369at86rf230_async_read_reg(struct at86rf230_local *lp, u8 reg,
370 struct at86rf230_state_change *ctx,
371 void (*complete)(void *context))
372{
373 int rc;
374
375 u8 *tx_buf = ctx->buf;
376
377 tx_buf[0] = (reg & CMD_REG_MASK) | CMD_REG;
378 ctx->msg.complete = complete;
379 rc = spi_async(lp->spi, &ctx->msg);
380 if (rc)
381 at86rf230_async_error(lp, ctx, rc);
382}
383
384static void
385at86rf230_async_write_reg(struct at86rf230_local *lp, u8 reg, u8 val,
386 struct at86rf230_state_change *ctx,
387 void (*complete)(void *context))
388{
389 int rc;
390
391 ctx->buf[0] = (reg & CMD_REG_MASK) | CMD_REG | CMD_WRITE;
392 ctx->buf[1] = val;
393 ctx->msg.complete = complete;
394 rc = spi_async(lp->spi, &ctx->msg);
395 if (rc)
396 at86rf230_async_error(lp, ctx, rc);
397}
398
399static void
400at86rf230_async_state_assert(void *context)
401{
402 struct at86rf230_state_change *ctx = context;
403 struct at86rf230_local *lp = ctx->lp;
404 const u8 *buf = ctx->buf;
405 const u8 trx_state = buf[1] & TRX_STATE_MASK;
406
407 /* Assert state change */
408 if (trx_state != ctx->to_state) {
409 /* Special handling if transceiver state is in
410 * STATE_BUSY_RX_AACK and a SHR was detected.
411 */
412 if (trx_state == STATE_BUSY_RX_AACK) {
413 /* Undocumented race condition. If we send a state
414 * change to STATE_RX_AACK_ON the transceiver could
415 * change his state automatically to STATE_BUSY_RX_AACK
416 * if a SHR was detected. This is not an error, but we
417 * can't assert this.
418 */
419 if (ctx->to_state == STATE_RX_AACK_ON)
420 goto done;
421
422 /* If we change to STATE_TX_ON without forcing and
423 * transceiver state is STATE_BUSY_RX_AACK, we wait
424 * 'tFrame + tPAck' receiving time. In this time the
425 * PDU should be received. If the transceiver is still
426 * in STATE_BUSY_RX_AACK, we run a force state change
427 * to STATE_TX_ON. This is a timeout handling, if the
428 * transceiver stucks in STATE_BUSY_RX_AACK.
429 *
430 * Additional we do several retries to try to get into
431 * TX_ON state without forcing. If the retries are
432 * higher or equal than AT86RF2XX_MAX_TX_RETRIES we
433 * will do a force change.
434 */
435 if (ctx->to_state == STATE_TX_ON ||
436 ctx->to_state == STATE_TRX_OFF) {
437 u8 state = ctx->to_state;
438
439 if (lp->tx_retry >= AT86RF2XX_MAX_TX_RETRIES)
440 state = STATE_FORCE_TRX_OFF;
441 lp->tx_retry++;
442
443 at86rf230_async_state_change(lp, ctx, state,
444 ctx->complete);
445 return;
446 }
447 }
448
449 dev_warn(&lp->spi->dev, "unexcept state change from 0x%02x to 0x%02x. Actual state: 0x%02x\n",
450 ctx->from_state, ctx->to_state, trx_state);
451 }
452
453done:
454 if (ctx->complete)
455 ctx->complete(context);
456}
457
458static enum hrtimer_restart at86rf230_async_state_timer(struct hrtimer *timer)
459{
460 struct at86rf230_state_change *ctx =
461 container_of(timer, struct at86rf230_state_change, timer);
462 struct at86rf230_local *lp = ctx->lp;
463
464 at86rf230_async_read_reg(lp, RG_TRX_STATUS, ctx,
465 at86rf230_async_state_assert);
466
467 return HRTIMER_NORESTART;
468}
469
470/* Do state change timing delay. */
471static void
472at86rf230_async_state_delay(void *context)
473{
474 struct at86rf230_state_change *ctx = context;
475 struct at86rf230_local *lp = ctx->lp;
476 struct at86rf2xx_chip_data *c = lp->data;
477 bool force = false;
478 ktime_t tim;
479
480 /* The force state changes are will show as normal states in the
481 * state status subregister. We change the to_state to the
482 * corresponding one and remember if it was a force change, this
483 * differs if we do a state change from STATE_BUSY_RX_AACK.
484 */
485 switch (ctx->to_state) {
486 case STATE_FORCE_TX_ON:
487 ctx->to_state = STATE_TX_ON;
488 force = true;
489 break;
490 case STATE_FORCE_TRX_OFF:
491 ctx->to_state = STATE_TRX_OFF;
492 force = true;
493 break;
494 default:
495 break;
496 }
497
498 switch (ctx->from_state) {
499 case STATE_TRX_OFF:
500 switch (ctx->to_state) {
501 case STATE_RX_AACK_ON:
502 tim = c->t_off_to_aack * NSEC_PER_USEC;
503 /* state change from TRX_OFF to RX_AACK_ON to do a
504 * calibration, we need to reset the timeout for the
505 * next one.
506 */
507 lp->cal_timeout = jiffies + AT86RF2XX_CAL_LOOP_TIMEOUT;
508 goto change;
509 case STATE_TX_ARET_ON:
510 case STATE_TX_ON:
511 tim = c->t_off_to_tx_on * NSEC_PER_USEC;
512 /* state change from TRX_OFF to TX_ON or ARET_ON to do
513 * a calibration, we need to reset the timeout for the
514 * next one.
515 */
516 lp->cal_timeout = jiffies + AT86RF2XX_CAL_LOOP_TIMEOUT;
517 goto change;
518 default:
519 break;
520 }
521 break;
522 case STATE_BUSY_RX_AACK:
523 switch (ctx->to_state) {
524 case STATE_TRX_OFF:
525 case STATE_TX_ON:
526 /* Wait for worst case receiving time if we
527 * didn't make a force change from BUSY_RX_AACK
528 * to TX_ON or TRX_OFF.
529 */
530 if (!force) {
531 tim = (c->t_frame + c->t_p_ack) * NSEC_PER_USEC;
532 goto change;
533 }
534 break;
535 default:
536 break;
537 }
538 break;
539 /* Default value, means RESET state */
540 case STATE_P_ON:
541 switch (ctx->to_state) {
542 case STATE_TRX_OFF:
543 tim = c->t_reset_to_off * NSEC_PER_USEC;
544 goto change;
545 default:
546 break;
547 }
548 break;
549 default:
550 break;
551 }
552
553 /* Default delay is 1us in the most cases */
554 udelay(1);
555 at86rf230_async_state_timer(&ctx->timer);
556 return;
557
558change:
559 hrtimer_start(&ctx->timer, tim, HRTIMER_MODE_REL);
560}
561
562static void
563at86rf230_async_state_change_start(void *context)
564{
565 struct at86rf230_state_change *ctx = context;
566 struct at86rf230_local *lp = ctx->lp;
567 u8 *buf = ctx->buf;
568 const u8 trx_state = buf[1] & TRX_STATE_MASK;
569
570 /* Check for "possible" STATE_TRANSITION_IN_PROGRESS */
571 if (trx_state == STATE_TRANSITION_IN_PROGRESS) {
572 udelay(1);
573 at86rf230_async_read_reg(lp, RG_TRX_STATUS, ctx,
574 at86rf230_async_state_change_start);
575 return;
576 }
577
578 /* Check if we already are in the state which we change in */
579 if (trx_state == ctx->to_state) {
580 if (ctx->complete)
581 ctx->complete(context);
582 return;
583 }
584
585 /* Set current state to the context of state change */
586 ctx->from_state = trx_state;
587
588 /* Going into the next step for a state change which do a timing
589 * relevant delay.
590 */
591 at86rf230_async_write_reg(lp, RG_TRX_STATE, ctx->to_state, ctx,
592 at86rf230_async_state_delay);
593}
594
595static void
596at86rf230_async_state_change(struct at86rf230_local *lp,
597 struct at86rf230_state_change *ctx,
598 const u8 state, void (*complete)(void *context))
599{
600 /* Initialization for the state change context */
601 ctx->to_state = state;
602 ctx->complete = complete;
603 at86rf230_async_read_reg(lp, RG_TRX_STATUS, ctx,
604 at86rf230_async_state_change_start);
605}
606
607static void
608at86rf230_sync_state_change_complete(void *context)
609{
610 struct at86rf230_state_change *ctx = context;
611 struct at86rf230_local *lp = ctx->lp;
612
613 complete(&lp->state_complete);
614}
615
616/* This function do a sync framework above the async state change.
617 * Some callbacks of the IEEE 802.15.4 driver interface need to be
618 * handled synchronously.
619 */
620static int
621at86rf230_sync_state_change(struct at86rf230_local *lp, unsigned int state)
622{
623 unsigned long rc;
624
625 at86rf230_async_state_change(lp, &lp->state, state,
626 at86rf230_sync_state_change_complete);
627
628 rc = wait_for_completion_timeout(&lp->state_complete,
629 msecs_to_jiffies(100));
630 if (!rc) {
631 at86rf230_async_error(lp, &lp->state, -ETIMEDOUT);
632 return -ETIMEDOUT;
633 }
634
635 return 0;
636}
637
638static void
639at86rf230_tx_complete(void *context)
640{
641 struct at86rf230_state_change *ctx = context;
642 struct at86rf230_local *lp = ctx->lp;
643
644 if (ctx->trac == IEEE802154_SUCCESS)
645 ieee802154_xmit_complete(lp->hw, lp->tx_skb, false);
646 else
647 ieee802154_xmit_error(lp->hw, lp->tx_skb, ctx->trac);
648
649 kfree(ctx);
650}
651
652static void
653at86rf230_tx_on(void *context)
654{
655 struct at86rf230_state_change *ctx = context;
656 struct at86rf230_local *lp = ctx->lp;
657
658 at86rf230_async_state_change(lp, ctx, STATE_RX_AACK_ON,
659 at86rf230_tx_complete);
660}
661
662static void
663at86rf230_tx_trac_check(void *context)
664{
665 struct at86rf230_state_change *ctx = context;
666 struct at86rf230_local *lp = ctx->lp;
667 u8 trac = TRAC_MASK(ctx->buf[1]);
668
669 switch (trac) {
670 case TRAC_SUCCESS:
671 case TRAC_SUCCESS_DATA_PENDING:
672 ctx->trac = IEEE802154_SUCCESS;
673 break;
674 case TRAC_CHANNEL_ACCESS_FAILURE:
675 ctx->trac = IEEE802154_CHANNEL_ACCESS_FAILURE;
676 break;
677 case TRAC_NO_ACK:
678 ctx->trac = IEEE802154_NO_ACK;
679 break;
680 default:
681 ctx->trac = IEEE802154_SYSTEM_ERROR;
682 }
683
684 at86rf230_async_state_change(lp, ctx, STATE_TX_ON, at86rf230_tx_on);
685}
686
687static void
688at86rf230_rx_read_frame_complete(void *context)
689{
690 struct at86rf230_state_change *ctx = context;
691 struct at86rf230_local *lp = ctx->lp;
692 const u8 *buf = ctx->buf;
693 struct sk_buff *skb;
694 u8 len, lqi;
695
696 len = buf[1];
697 if (!ieee802154_is_valid_psdu_len(len)) {
698 dev_vdbg(&lp->spi->dev, "corrupted frame received\n");
699 len = IEEE802154_MTU;
700 }
701 lqi = buf[2 + len];
702
703 skb = dev_alloc_skb(IEEE802154_MTU);
704 if (!skb) {
705 dev_vdbg(&lp->spi->dev, "failed to allocate sk_buff\n");
706 kfree(ctx);
707 return;
708 }
709
710 skb_put_data(skb, buf + 2, len);
711 ieee802154_rx_irqsafe(lp->hw, skb, lqi);
712 kfree(ctx);
713}
714
715static void
716at86rf230_rx_trac_check(void *context)
717{
718 struct at86rf230_state_change *ctx = context;
719 struct at86rf230_local *lp = ctx->lp;
720 u8 *buf = ctx->buf;
721 int rc;
722
723 buf[0] = CMD_FB;
724 ctx->trx.len = AT86RF2XX_MAX_BUF;
725 ctx->msg.complete = at86rf230_rx_read_frame_complete;
726 rc = spi_async(lp->spi, &ctx->msg);
727 if (rc) {
728 ctx->trx.len = 2;
729 at86rf230_async_error(lp, ctx, rc);
730 }
731}
732
733static void
734at86rf230_irq_trx_end(void *context)
735{
736 struct at86rf230_state_change *ctx = context;
737 struct at86rf230_local *lp = ctx->lp;
738
739 if (lp->is_tx) {
740 lp->is_tx = 0;
741 at86rf230_async_read_reg(lp, RG_TRX_STATE, ctx,
742 at86rf230_tx_trac_check);
743 } else {
744 at86rf230_async_read_reg(lp, RG_TRX_STATE, ctx,
745 at86rf230_rx_trac_check);
746 }
747}
748
749static void
750at86rf230_irq_status(void *context)
751{
752 struct at86rf230_state_change *ctx = context;
753 struct at86rf230_local *lp = ctx->lp;
754 const u8 *buf = ctx->buf;
755 u8 irq = buf[1];
756
757 enable_irq(lp->spi->irq);
758
759 if (irq & IRQ_TRX_END) {
760 at86rf230_irq_trx_end(ctx);
761 } else {
762 dev_err(&lp->spi->dev, "not supported irq %02x received\n",
763 irq);
764 kfree(ctx);
765 }
766}
767
768static void
769at86rf230_setup_spi_messages(struct at86rf230_local *lp,
770 struct at86rf230_state_change *state)
771{
772 state->lp = lp;
773 state->irq = lp->spi->irq;
774 spi_message_init(&state->msg);
775 state->msg.context = state;
776 state->trx.len = 2;
777 state->trx.tx_buf = state->buf;
778 state->trx.rx_buf = state->buf;
779 spi_message_add_tail(&state->trx, &state->msg);
780 hrtimer_init(&state->timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
781 state->timer.function = at86rf230_async_state_timer;
782}
783
784static irqreturn_t at86rf230_isr(int irq, void *data)
785{
786 struct at86rf230_local *lp = data;
787 struct at86rf230_state_change *ctx;
788 int rc;
789
790 disable_irq_nosync(irq);
791
792 ctx = kzalloc(sizeof(*ctx), GFP_ATOMIC);
793 if (!ctx) {
794 enable_irq(irq);
795 return IRQ_NONE;
796 }
797
798 at86rf230_setup_spi_messages(lp, ctx);
799 /* tell on error handling to free ctx */
800 ctx->free = true;
801
802 ctx->buf[0] = (RG_IRQ_STATUS & CMD_REG_MASK) | CMD_REG;
803 ctx->msg.complete = at86rf230_irq_status;
804 rc = spi_async(lp->spi, &ctx->msg);
805 if (rc) {
806 at86rf230_async_error(lp, ctx, rc);
807 enable_irq(irq);
808 return IRQ_NONE;
809 }
810
811 return IRQ_HANDLED;
812}
813
814static void
815at86rf230_write_frame_complete(void *context)
816{
817 struct at86rf230_state_change *ctx = context;
818 struct at86rf230_local *lp = ctx->lp;
819
820 ctx->trx.len = 2;
821
822 if (lp->slp_tr)
823 at86rf230_slp_tr_rising_edge(lp);
824 else
825 at86rf230_async_write_reg(lp, RG_TRX_STATE, STATE_BUSY_TX, ctx,
826 NULL);
827}
828
829static void
830at86rf230_write_frame(void *context)
831{
832 struct at86rf230_state_change *ctx = context;
833 struct at86rf230_local *lp = ctx->lp;
834 struct sk_buff *skb = lp->tx_skb;
835 u8 *buf = ctx->buf;
836 int rc;
837
838 lp->is_tx = 1;
839
840 buf[0] = CMD_FB | CMD_WRITE;
841 buf[1] = skb->len + 2;
842 memcpy(buf + 2, skb->data, skb->len);
843 ctx->trx.len = skb->len + 2;
844 ctx->msg.complete = at86rf230_write_frame_complete;
845 rc = spi_async(lp->spi, &ctx->msg);
846 if (rc) {
847 ctx->trx.len = 2;
848 at86rf230_async_error(lp, ctx, rc);
849 }
850}
851
852static void
853at86rf230_xmit_tx_on(void *context)
854{
855 struct at86rf230_state_change *ctx = context;
856 struct at86rf230_local *lp = ctx->lp;
857
858 at86rf230_async_state_change(lp, ctx, STATE_TX_ARET_ON,
859 at86rf230_write_frame);
860}
861
862static void
863at86rf230_xmit_start(void *context)
864{
865 struct at86rf230_state_change *ctx = context;
866 struct at86rf230_local *lp = ctx->lp;
867
868 /* check if we change from off state */
869 if (lp->is_tx_from_off)
870 at86rf230_async_state_change(lp, ctx, STATE_TX_ARET_ON,
871 at86rf230_write_frame);
872 else
873 at86rf230_async_state_change(lp, ctx, STATE_TX_ON,
874 at86rf230_xmit_tx_on);
875}
876
877static int
878at86rf230_xmit(struct ieee802154_hw *hw, struct sk_buff *skb)
879{
880 struct at86rf230_local *lp = hw->priv;
881 struct at86rf230_state_change *ctx = &lp->tx;
882
883 lp->tx_skb = skb;
884 lp->tx_retry = 0;
885
886 /* After 5 minutes in PLL and the same frequency we run again the
887 * calibration loops which is recommended by at86rf2xx datasheets.
888 *
889 * The calibration is initiate by a state change from TRX_OFF
890 * to TX_ON, the lp->cal_timeout should be reinit by state_delay
891 * function then to start in the next 5 minutes.
892 */
893 if (time_is_before_jiffies(lp->cal_timeout)) {
894 lp->is_tx_from_off = true;
895 at86rf230_async_state_change(lp, ctx, STATE_TRX_OFF,
896 at86rf230_xmit_start);
897 } else {
898 lp->is_tx_from_off = false;
899 at86rf230_xmit_start(ctx);
900 }
901
902 return 0;
903}
904
905static int
906at86rf230_ed(struct ieee802154_hw *hw, u8 *level)
907{
908 WARN_ON(!level);
909 *level = 0xbe;
910 return 0;
911}
912
913static int
914at86rf230_start(struct ieee802154_hw *hw)
915{
916 struct at86rf230_local *lp = hw->priv;
917
918 at86rf230_awake(lp);
919 enable_irq(lp->spi->irq);
920
921 return at86rf230_sync_state_change(lp, STATE_RX_AACK_ON);
922}
923
924static void
925at86rf230_stop(struct ieee802154_hw *hw)
926{
927 struct at86rf230_local *lp = hw->priv;
928 u8 csma_seed[2];
929
930 at86rf230_sync_state_change(lp, STATE_FORCE_TRX_OFF);
931
932 disable_irq(lp->spi->irq);
933
934 /* It's recommended to set random new csma_seeds before sleep state.
935 * Makes only sense in the stop callback, not doing this inside of
936 * at86rf230_sleep, this is also used when we don't transmit afterwards
937 * when calling start callback again.
938 */
939 get_random_bytes(csma_seed, ARRAY_SIZE(csma_seed));
940 at86rf230_write_subreg(lp, SR_CSMA_SEED_0, csma_seed[0]);
941 at86rf230_write_subreg(lp, SR_CSMA_SEED_1, csma_seed[1]);
942
943 at86rf230_sleep(lp);
944}
945
946static int
947at86rf23x_set_channel(struct at86rf230_local *lp, u8 page, u8 channel)
948{
949 return at86rf230_write_subreg(lp, SR_CHANNEL, channel);
950}
951
952#define AT86RF2XX_MAX_ED_LEVELS 0xF
953static const s32 at86rf233_ed_levels[AT86RF2XX_MAX_ED_LEVELS + 1] = {
954 -9400, -9200, -9000, -8800, -8600, -8400, -8200, -8000, -7800, -7600,
955 -7400, -7200, -7000, -6800, -6600, -6400,
956};
957
958static const s32 at86rf231_ed_levels[AT86RF2XX_MAX_ED_LEVELS + 1] = {
959 -9100, -8900, -8700, -8500, -8300, -8100, -7900, -7700, -7500, -7300,
960 -7100, -6900, -6700, -6500, -6300, -6100,
961};
962
963static const s32 at86rf212_ed_levels_100[AT86RF2XX_MAX_ED_LEVELS + 1] = {
964 -10000, -9800, -9600, -9400, -9200, -9000, -8800, -8600, -8400, -8200,
965 -8000, -7800, -7600, -7400, -7200, -7000,
966};
967
968static const s32 at86rf212_ed_levels_98[AT86RF2XX_MAX_ED_LEVELS + 1] = {
969 -9800, -9600, -9400, -9200, -9000, -8800, -8600, -8400, -8200, -8000,
970 -7800, -7600, -7400, -7200, -7000, -6800,
971};
972
973static inline int
974at86rf212_update_cca_ed_level(struct at86rf230_local *lp, int rssi_base_val)
975{
976 unsigned int cca_ed_thres;
977 int rc;
978
979 rc = at86rf230_read_subreg(lp, SR_CCA_ED_THRES, &cca_ed_thres);
980 if (rc < 0)
981 return rc;
982
983 switch (rssi_base_val) {
984 case -98:
985 lp->hw->phy->supported.cca_ed_levels = at86rf212_ed_levels_98;
986 lp->hw->phy->supported.cca_ed_levels_size = ARRAY_SIZE(at86rf212_ed_levels_98);
987 lp->hw->phy->cca_ed_level = at86rf212_ed_levels_98[cca_ed_thres];
988 break;
989 case -100:
990 lp->hw->phy->supported.cca_ed_levels = at86rf212_ed_levels_100;
991 lp->hw->phy->supported.cca_ed_levels_size = ARRAY_SIZE(at86rf212_ed_levels_100);
992 lp->hw->phy->cca_ed_level = at86rf212_ed_levels_100[cca_ed_thres];
993 break;
994 default:
995 WARN_ON(1);
996 }
997
998 return 0;
999}
1000
1001static int
1002at86rf212_set_channel(struct at86rf230_local *lp, u8 page, u8 channel)
1003{
1004 int rc;
1005
1006 if (channel == 0)
1007 rc = at86rf230_write_subreg(lp, SR_SUB_MODE, 0);
1008 else
1009 rc = at86rf230_write_subreg(lp, SR_SUB_MODE, 1);
1010 if (rc < 0)
1011 return rc;
1012
1013 if (page == 0) {
1014 rc = at86rf230_write_subreg(lp, SR_BPSK_QPSK, 0);
1015 lp->data->rssi_base_val = -100;
1016 } else {
1017 rc = at86rf230_write_subreg(lp, SR_BPSK_QPSK, 1);
1018 lp->data->rssi_base_val = -98;
1019 }
1020 if (rc < 0)
1021 return rc;
1022
1023 rc = at86rf212_update_cca_ed_level(lp, lp->data->rssi_base_val);
1024 if (rc < 0)
1025 return rc;
1026
1027 return at86rf230_write_subreg(lp, SR_CHANNEL, channel);
1028}
1029
1030static int
1031at86rf230_channel(struct ieee802154_hw *hw, u8 page, u8 channel)
1032{
1033 struct at86rf230_local *lp = hw->priv;
1034 int rc;
1035
1036 rc = lp->data->set_channel(lp, page, channel);
1037 /* Wait for PLL */
1038 usleep_range(lp->data->t_channel_switch,
1039 lp->data->t_channel_switch + 10);
1040
1041 lp->cal_timeout = jiffies + AT86RF2XX_CAL_LOOP_TIMEOUT;
1042 return rc;
1043}
1044
1045static int
1046at86rf230_set_hw_addr_filt(struct ieee802154_hw *hw,
1047 struct ieee802154_hw_addr_filt *filt,
1048 unsigned long changed)
1049{
1050 struct at86rf230_local *lp = hw->priv;
1051
1052 if (changed & IEEE802154_AFILT_SADDR_CHANGED) {
1053 u16 addr = le16_to_cpu(filt->short_addr);
1054
1055 dev_vdbg(&lp->spi->dev, "%s called for saddr\n", __func__);
1056 __at86rf230_write(lp, RG_SHORT_ADDR_0, addr);
1057 __at86rf230_write(lp, RG_SHORT_ADDR_1, addr >> 8);
1058 }
1059
1060 if (changed & IEEE802154_AFILT_PANID_CHANGED) {
1061 u16 pan = le16_to_cpu(filt->pan_id);
1062
1063 dev_vdbg(&lp->spi->dev, "%s called for pan id\n", __func__);
1064 __at86rf230_write(lp, RG_PAN_ID_0, pan);
1065 __at86rf230_write(lp, RG_PAN_ID_1, pan >> 8);
1066 }
1067
1068 if (changed & IEEE802154_AFILT_IEEEADDR_CHANGED) {
1069 u8 i, addr[8];
1070
1071 memcpy(addr, &filt->ieee_addr, 8);
1072 dev_vdbg(&lp->spi->dev, "%s called for IEEE addr\n", __func__);
1073 for (i = 0; i < 8; i++)
1074 __at86rf230_write(lp, RG_IEEE_ADDR_0 + i, addr[i]);
1075 }
1076
1077 if (changed & IEEE802154_AFILT_PANC_CHANGED) {
1078 dev_vdbg(&lp->spi->dev, "%s called for panc change\n", __func__);
1079 if (filt->pan_coord)
1080 at86rf230_write_subreg(lp, SR_AACK_I_AM_COORD, 1);
1081 else
1082 at86rf230_write_subreg(lp, SR_AACK_I_AM_COORD, 0);
1083 }
1084
1085 return 0;
1086}
1087
1088#define AT86RF23X_MAX_TX_POWERS 0xF
1089static const s32 at86rf233_powers[AT86RF23X_MAX_TX_POWERS + 1] = {
1090 400, 370, 340, 300, 250, 200, 100, 0, -100, -200, -300, -400, -600,
1091 -800, -1200, -1700,
1092};
1093
1094static const s32 at86rf231_powers[AT86RF23X_MAX_TX_POWERS + 1] = {
1095 300, 280, 230, 180, 130, 70, 0, -100, -200, -300, -400, -500, -700,
1096 -900, -1200, -1700,
1097};
1098
1099#define AT86RF212_MAX_TX_POWERS 0x1F
1100static const s32 at86rf212_powers[AT86RF212_MAX_TX_POWERS + 1] = {
1101 500, 400, 300, 200, 100, 0, -100, -200, -300, -400, -500, -600, -700,
1102 -800, -900, -1000, -1100, -1200, -1300, -1400, -1500, -1600, -1700,
1103 -1800, -1900, -2000, -2100, -2200, -2300, -2400, -2500, -2600,
1104};
1105
1106static int
1107at86rf23x_set_txpower(struct at86rf230_local *lp, s32 mbm)
1108{
1109 u32 i;
1110
1111 for (i = 0; i < lp->hw->phy->supported.tx_powers_size; i++) {
1112 if (lp->hw->phy->supported.tx_powers[i] == mbm)
1113 return at86rf230_write_subreg(lp, SR_TX_PWR_23X, i);
1114 }
1115
1116 return -EINVAL;
1117}
1118
1119static int
1120at86rf212_set_txpower(struct at86rf230_local *lp, s32 mbm)
1121{
1122 u32 i;
1123
1124 for (i = 0; i < lp->hw->phy->supported.tx_powers_size; i++) {
1125 if (lp->hw->phy->supported.tx_powers[i] == mbm)
1126 return at86rf230_write_subreg(lp, SR_TX_PWR_212, i);
1127 }
1128
1129 return -EINVAL;
1130}
1131
1132static int
1133at86rf230_set_txpower(struct ieee802154_hw *hw, s32 mbm)
1134{
1135 struct at86rf230_local *lp = hw->priv;
1136
1137 return lp->data->set_txpower(lp, mbm);
1138}
1139
1140static int
1141at86rf230_set_lbt(struct ieee802154_hw *hw, bool on)
1142{
1143 struct at86rf230_local *lp = hw->priv;
1144
1145 return at86rf230_write_subreg(lp, SR_CSMA_LBT_MODE, on);
1146}
1147
1148static int
1149at86rf230_set_cca_mode(struct ieee802154_hw *hw,
1150 const struct wpan_phy_cca *cca)
1151{
1152 struct at86rf230_local *lp = hw->priv;
1153 u8 val;
1154
1155 /* mapping 802.15.4 to driver spec */
1156 switch (cca->mode) {
1157 case NL802154_CCA_ENERGY:
1158 val = 1;
1159 break;
1160 case NL802154_CCA_CARRIER:
1161 val = 2;
1162 break;
1163 case NL802154_CCA_ENERGY_CARRIER:
1164 switch (cca->opt) {
1165 case NL802154_CCA_OPT_ENERGY_CARRIER_AND:
1166 val = 3;
1167 break;
1168 case NL802154_CCA_OPT_ENERGY_CARRIER_OR:
1169 val = 0;
1170 break;
1171 default:
1172 return -EINVAL;
1173 }
1174 break;
1175 default:
1176 return -EINVAL;
1177 }
1178
1179 return at86rf230_write_subreg(lp, SR_CCA_MODE, val);
1180}
1181
1182static int
1183at86rf230_set_cca_ed_level(struct ieee802154_hw *hw, s32 mbm)
1184{
1185 struct at86rf230_local *lp = hw->priv;
1186 u32 i;
1187
1188 for (i = 0; i < hw->phy->supported.cca_ed_levels_size; i++) {
1189 if (hw->phy->supported.cca_ed_levels[i] == mbm)
1190 return at86rf230_write_subreg(lp, SR_CCA_ED_THRES, i);
1191 }
1192
1193 return -EINVAL;
1194}
1195
1196static int
1197at86rf230_set_csma_params(struct ieee802154_hw *hw, u8 min_be, u8 max_be,
1198 u8 retries)
1199{
1200 struct at86rf230_local *lp = hw->priv;
1201 int rc;
1202
1203 rc = at86rf230_write_subreg(lp, SR_MIN_BE, min_be);
1204 if (rc)
1205 return rc;
1206
1207 rc = at86rf230_write_subreg(lp, SR_MAX_BE, max_be);
1208 if (rc)
1209 return rc;
1210
1211 return at86rf230_write_subreg(lp, SR_MAX_CSMA_RETRIES, retries);
1212}
1213
1214static int
1215at86rf230_set_frame_retries(struct ieee802154_hw *hw, s8 retries)
1216{
1217 struct at86rf230_local *lp = hw->priv;
1218
1219 return at86rf230_write_subreg(lp, SR_MAX_FRAME_RETRIES, retries);
1220}
1221
1222static int
1223at86rf230_set_promiscuous_mode(struct ieee802154_hw *hw, const bool on)
1224{
1225 struct at86rf230_local *lp = hw->priv;
1226 int rc;
1227
1228 if (on) {
1229 rc = at86rf230_write_subreg(lp, SR_AACK_DIS_ACK, 1);
1230 if (rc < 0)
1231 return rc;
1232
1233 rc = at86rf230_write_subreg(lp, SR_AACK_PROM_MODE, 1);
1234 if (rc < 0)
1235 return rc;
1236 } else {
1237 rc = at86rf230_write_subreg(lp, SR_AACK_PROM_MODE, 0);
1238 if (rc < 0)
1239 return rc;
1240
1241 rc = at86rf230_write_subreg(lp, SR_AACK_DIS_ACK, 0);
1242 if (rc < 0)
1243 return rc;
1244 }
1245
1246 return 0;
1247}
1248
1249static const struct ieee802154_ops at86rf230_ops = {
1250 .owner = THIS_MODULE,
1251 .xmit_async = at86rf230_xmit,
1252 .ed = at86rf230_ed,
1253 .set_channel = at86rf230_channel,
1254 .start = at86rf230_start,
1255 .stop = at86rf230_stop,
1256 .set_hw_addr_filt = at86rf230_set_hw_addr_filt,
1257 .set_txpower = at86rf230_set_txpower,
1258 .set_lbt = at86rf230_set_lbt,
1259 .set_cca_mode = at86rf230_set_cca_mode,
1260 .set_cca_ed_level = at86rf230_set_cca_ed_level,
1261 .set_csma_params = at86rf230_set_csma_params,
1262 .set_frame_retries = at86rf230_set_frame_retries,
1263 .set_promiscuous_mode = at86rf230_set_promiscuous_mode,
1264};
1265
1266static struct at86rf2xx_chip_data at86rf233_data = {
1267 .t_sleep_cycle = 330,
1268 .t_channel_switch = 11,
1269 .t_reset_to_off = 26,
1270 .t_off_to_aack = 80,
1271 .t_off_to_tx_on = 80,
1272 .t_off_to_sleep = 35,
1273 .t_sleep_to_off = 1000,
1274 .t_frame = 4096,
1275 .t_p_ack = 545,
1276 .rssi_base_val = -94,
1277 .set_channel = at86rf23x_set_channel,
1278 .set_txpower = at86rf23x_set_txpower,
1279};
1280
1281static struct at86rf2xx_chip_data at86rf231_data = {
1282 .t_sleep_cycle = 330,
1283 .t_channel_switch = 24,
1284 .t_reset_to_off = 37,
1285 .t_off_to_aack = 110,
1286 .t_off_to_tx_on = 110,
1287 .t_off_to_sleep = 35,
1288 .t_sleep_to_off = 1000,
1289 .t_frame = 4096,
1290 .t_p_ack = 545,
1291 .rssi_base_val = -91,
1292 .set_channel = at86rf23x_set_channel,
1293 .set_txpower = at86rf23x_set_txpower,
1294};
1295
1296static struct at86rf2xx_chip_data at86rf212_data = {
1297 .t_sleep_cycle = 330,
1298 .t_channel_switch = 11,
1299 .t_reset_to_off = 26,
1300 .t_off_to_aack = 200,
1301 .t_off_to_tx_on = 200,
1302 .t_off_to_sleep = 35,
1303 .t_sleep_to_off = 1000,
1304 .t_frame = 4096,
1305 .t_p_ack = 545,
1306 .rssi_base_val = -100,
1307 .set_channel = at86rf212_set_channel,
1308 .set_txpower = at86rf212_set_txpower,
1309};
1310
1311static int at86rf230_hw_init(struct at86rf230_local *lp, u8 xtal_trim)
1312{
1313 int rc, irq_type, irq_pol = IRQ_ACTIVE_HIGH;
1314 unsigned int dvdd;
1315 u8 csma_seed[2];
1316
1317 rc = at86rf230_sync_state_change(lp, STATE_FORCE_TRX_OFF);
1318 if (rc)
1319 return rc;
1320
1321 irq_type = irq_get_trigger_type(lp->spi->irq);
1322 if (irq_type == IRQ_TYPE_EDGE_FALLING ||
1323 irq_type == IRQ_TYPE_LEVEL_LOW)
1324 irq_pol = IRQ_ACTIVE_LOW;
1325
1326 rc = at86rf230_write_subreg(lp, SR_IRQ_POLARITY, irq_pol);
1327 if (rc)
1328 return rc;
1329
1330 rc = at86rf230_write_subreg(lp, SR_RX_SAFE_MODE, 1);
1331 if (rc)
1332 return rc;
1333
1334 rc = at86rf230_write_subreg(lp, SR_IRQ_MASK, IRQ_TRX_END);
1335 if (rc)
1336 return rc;
1337
1338 /* reset values differs in at86rf231 and at86rf233 */
1339 rc = at86rf230_write_subreg(lp, SR_IRQ_MASK_MODE, 0);
1340 if (rc)
1341 return rc;
1342
1343 get_random_bytes(csma_seed, ARRAY_SIZE(csma_seed));
1344 rc = at86rf230_write_subreg(lp, SR_CSMA_SEED_0, csma_seed[0]);
1345 if (rc)
1346 return rc;
1347 rc = at86rf230_write_subreg(lp, SR_CSMA_SEED_1, csma_seed[1]);
1348 if (rc)
1349 return rc;
1350
1351 /* CLKM changes are applied immediately */
1352 rc = at86rf230_write_subreg(lp, SR_CLKM_SHA_SEL, 0x00);
1353 if (rc)
1354 return rc;
1355
1356 /* Turn CLKM Off */
1357 rc = at86rf230_write_subreg(lp, SR_CLKM_CTRL, 0x00);
1358 if (rc)
1359 return rc;
1360 /* Wait the next SLEEP cycle */
1361 usleep_range(lp->data->t_sleep_cycle,
1362 lp->data->t_sleep_cycle + 100);
1363
1364 /* xtal_trim value is calculated by:
1365 * CL = 0.5 * (CX + CTRIM + CPAR)
1366 *
1367 * whereas:
1368 * CL = capacitor of used crystal
1369 * CX = connected capacitors at xtal pins
1370 * CPAR = in all at86rf2xx datasheets this is a constant value 3 pF,
1371 * but this is different on each board setup. You need to fine
1372 * tuning this value via CTRIM.
1373 * CTRIM = variable capacitor setting. Resolution is 0.3 pF range is
1374 * 0 pF upto 4.5 pF.
1375 *
1376 * Examples:
1377 * atben transceiver:
1378 *
1379 * CL = 8 pF
1380 * CX = 12 pF
1381 * CPAR = 3 pF (We assume the magic constant from datasheet)
1382 * CTRIM = 0.9 pF
1383 *
1384 * (12+0.9+3)/2 = 7.95 which is nearly at 8 pF
1385 *
1386 * xtal_trim = 0x3
1387 *
1388 * openlabs transceiver:
1389 *
1390 * CL = 16 pF
1391 * CX = 22 pF
1392 * CPAR = 3 pF (We assume the magic constant from datasheet)
1393 * CTRIM = 4.5 pF
1394 *
1395 * (22+4.5+3)/2 = 14.75 which is the nearest value to 16 pF
1396 *
1397 * xtal_trim = 0xf
1398 */
1399 rc = at86rf230_write_subreg(lp, SR_XTAL_TRIM, xtal_trim);
1400 if (rc)
1401 return rc;
1402
1403 rc = at86rf230_read_subreg(lp, SR_DVDD_OK, &dvdd);
1404 if (rc)
1405 return rc;
1406 if (!dvdd) {
1407 dev_err(&lp->spi->dev, "DVDD error\n");
1408 return -EINVAL;
1409 }
1410
1411 /* Force setting slotted operation bit to 0. Sometimes the atben
1412 * sets this bit and I don't know why. We set this always force
1413 * to zero while probing.
1414 */
1415 return at86rf230_write_subreg(lp, SR_SLOTTED_OPERATION, 0);
1416}
1417
1418static int
1419at86rf230_detect_device(struct at86rf230_local *lp)
1420{
1421 unsigned int part, version, val;
1422 u16 man_id = 0;
1423 const char *chip;
1424 int rc;
1425
1426 rc = __at86rf230_read(lp, RG_MAN_ID_0, &val);
1427 if (rc)
1428 return rc;
1429 man_id |= val;
1430
1431 rc = __at86rf230_read(lp, RG_MAN_ID_1, &val);
1432 if (rc)
1433 return rc;
1434 man_id |= (val << 8);
1435
1436 rc = __at86rf230_read(lp, RG_PART_NUM, &part);
1437 if (rc)
1438 return rc;
1439
1440 rc = __at86rf230_read(lp, RG_VERSION_NUM, &version);
1441 if (rc)
1442 return rc;
1443
1444 if (man_id != 0x001f) {
1445 dev_err(&lp->spi->dev, "Non-Atmel dev found (MAN_ID %02x %02x)\n",
1446 man_id >> 8, man_id & 0xFF);
1447 return -EINVAL;
1448 }
1449
1450 lp->hw->flags = IEEE802154_HW_TX_OMIT_CKSUM |
1451 IEEE802154_HW_CSMA_PARAMS |
1452 IEEE802154_HW_FRAME_RETRIES | IEEE802154_HW_AFILT |
1453 IEEE802154_HW_PROMISCUOUS;
1454
1455 lp->hw->phy->flags = WPAN_PHY_FLAG_TXPOWER |
1456 WPAN_PHY_FLAG_CCA_ED_LEVEL |
1457 WPAN_PHY_FLAG_CCA_MODE;
1458
1459 lp->hw->phy->supported.cca_modes = BIT(NL802154_CCA_ENERGY) |
1460 BIT(NL802154_CCA_CARRIER) | BIT(NL802154_CCA_ENERGY_CARRIER);
1461 lp->hw->phy->supported.cca_opts = BIT(NL802154_CCA_OPT_ENERGY_CARRIER_AND) |
1462 BIT(NL802154_CCA_OPT_ENERGY_CARRIER_OR);
1463
1464 lp->hw->phy->cca.mode = NL802154_CCA_ENERGY;
1465
1466 switch (part) {
1467 case 2:
1468 chip = "at86rf230";
1469 rc = -ENOTSUPP;
1470 goto not_supp;
1471 case 3:
1472 chip = "at86rf231";
1473 lp->data = &at86rf231_data;
1474 lp->hw->phy->supported.channels[0] = 0x7FFF800;
1475 lp->hw->phy->current_channel = 11;
1476 lp->hw->phy->supported.tx_powers = at86rf231_powers;
1477 lp->hw->phy->supported.tx_powers_size = ARRAY_SIZE(at86rf231_powers);
1478 lp->hw->phy->supported.cca_ed_levels = at86rf231_ed_levels;
1479 lp->hw->phy->supported.cca_ed_levels_size = ARRAY_SIZE(at86rf231_ed_levels);
1480 break;
1481 case 7:
1482 chip = "at86rf212";
1483 lp->data = &at86rf212_data;
1484 lp->hw->flags |= IEEE802154_HW_LBT;
1485 lp->hw->phy->supported.channels[0] = 0x00007FF;
1486 lp->hw->phy->supported.channels[2] = 0x00007FF;
1487 lp->hw->phy->current_channel = 5;
1488 lp->hw->phy->supported.lbt = NL802154_SUPPORTED_BOOL_BOTH;
1489 lp->hw->phy->supported.tx_powers = at86rf212_powers;
1490 lp->hw->phy->supported.tx_powers_size = ARRAY_SIZE(at86rf212_powers);
1491 lp->hw->phy->supported.cca_ed_levels = at86rf212_ed_levels_100;
1492 lp->hw->phy->supported.cca_ed_levels_size = ARRAY_SIZE(at86rf212_ed_levels_100);
1493 break;
1494 case 11:
1495 chip = "at86rf233";
1496 lp->data = &at86rf233_data;
1497 lp->hw->phy->supported.channels[0] = 0x7FFF800;
1498 lp->hw->phy->current_channel = 13;
1499 lp->hw->phy->supported.tx_powers = at86rf233_powers;
1500 lp->hw->phy->supported.tx_powers_size = ARRAY_SIZE(at86rf233_powers);
1501 lp->hw->phy->supported.cca_ed_levels = at86rf233_ed_levels;
1502 lp->hw->phy->supported.cca_ed_levels_size = ARRAY_SIZE(at86rf233_ed_levels);
1503 break;
1504 default:
1505 chip = "unknown";
1506 rc = -ENOTSUPP;
1507 goto not_supp;
1508 }
1509
1510 lp->hw->phy->cca_ed_level = lp->hw->phy->supported.cca_ed_levels[7];
1511 lp->hw->phy->transmit_power = lp->hw->phy->supported.tx_powers[0];
1512
1513not_supp:
1514 dev_info(&lp->spi->dev, "Detected %s chip version %d\n", chip, version);
1515
1516 return rc;
1517}
1518
1519static int at86rf230_probe(struct spi_device *spi)
1520{
1521 struct ieee802154_hw *hw;
1522 struct at86rf230_local *lp;
1523 struct gpio_desc *slp_tr;
1524 struct gpio_desc *rstn;
1525 unsigned int status;
1526 int rc, irq_type;
1527 u8 xtal_trim;
1528
1529 if (!spi->irq) {
1530 dev_err(&spi->dev, "no IRQ specified\n");
1531 return -EINVAL;
1532 }
1533
1534 rc = device_property_read_u8(&spi->dev, "xtal-trim", &xtal_trim);
1535 if (rc < 0) {
1536 if (rc != -EINVAL) {
1537 dev_err(&spi->dev,
1538 "failed to parse xtal-trim: %d\n", rc);
1539 return rc;
1540 }
1541 xtal_trim = 0;
1542 }
1543
1544 rstn = devm_gpiod_get_optional(&spi->dev, "reset", GPIOD_OUT_LOW);
1545 rc = PTR_ERR_OR_ZERO(rstn);
1546 if (rc)
1547 return rc;
1548
1549 gpiod_set_consumer_name(rstn, "rstn");
1550
1551 slp_tr = devm_gpiod_get_optional(&spi->dev, "sleep", GPIOD_OUT_LOW);
1552 rc = PTR_ERR_OR_ZERO(slp_tr);
1553 if (rc)
1554 return rc;
1555
1556 gpiod_set_consumer_name(slp_tr, "slp_tr");
1557
1558 /* Reset */
1559 if (rstn) {
1560 udelay(1);
1561 gpiod_set_value_cansleep(rstn, 1);
1562 udelay(1);
1563 gpiod_set_value_cansleep(rstn, 0);
1564 usleep_range(120, 240);
1565 }
1566
1567 hw = ieee802154_alloc_hw(sizeof(*lp), &at86rf230_ops);
1568 if (!hw)
1569 return -ENOMEM;
1570
1571 lp = hw->priv;
1572 lp->hw = hw;
1573 lp->spi = spi;
1574 lp->slp_tr = slp_tr;
1575 hw->parent = &spi->dev;
1576 ieee802154_random_extended_addr(&hw->phy->perm_extended_addr);
1577
1578 lp->regmap = devm_regmap_init_spi(spi, &at86rf230_regmap_spi_config);
1579 if (IS_ERR(lp->regmap)) {
1580 rc = PTR_ERR(lp->regmap);
1581 dev_err(&spi->dev, "Failed to allocate register map: %d\n",
1582 rc);
1583 goto free_dev;
1584 }
1585
1586 at86rf230_setup_spi_messages(lp, &lp->state);
1587 at86rf230_setup_spi_messages(lp, &lp->tx);
1588
1589 rc = at86rf230_detect_device(lp);
1590 if (rc < 0)
1591 goto free_dev;
1592
1593 init_completion(&lp->state_complete);
1594
1595 spi_set_drvdata(spi, lp);
1596
1597 rc = at86rf230_hw_init(lp, xtal_trim);
1598 if (rc)
1599 goto free_dev;
1600
1601 /* Read irq status register to reset irq line */
1602 rc = at86rf230_read_subreg(lp, RG_IRQ_STATUS, 0xff, 0, &status);
1603 if (rc)
1604 goto free_dev;
1605
1606 irq_type = irq_get_trigger_type(spi->irq);
1607 if (!irq_type)
1608 irq_type = IRQF_TRIGGER_HIGH;
1609
1610 rc = devm_request_irq(&spi->dev, spi->irq, at86rf230_isr,
1611 IRQF_SHARED | irq_type, dev_name(&spi->dev), lp);
1612 if (rc)
1613 goto free_dev;
1614
1615 /* disable_irq by default and wait for starting hardware */
1616 disable_irq(spi->irq);
1617
1618 /* going into sleep by default */
1619 at86rf230_sleep(lp);
1620
1621 rc = ieee802154_register_hw(lp->hw);
1622 if (rc)
1623 goto free_dev;
1624
1625 return rc;
1626
1627free_dev:
1628 ieee802154_free_hw(lp->hw);
1629
1630 return rc;
1631}
1632
1633static void at86rf230_remove(struct spi_device *spi)
1634{
1635 struct at86rf230_local *lp = spi_get_drvdata(spi);
1636
1637 /* mask all at86rf230 irq's */
1638 at86rf230_write_subreg(lp, SR_IRQ_MASK, 0);
1639 ieee802154_unregister_hw(lp->hw);
1640 ieee802154_free_hw(lp->hw);
1641 dev_dbg(&spi->dev, "unregistered at86rf230\n");
1642}
1643
1644static const struct of_device_id at86rf230_of_match[] = {
1645 { .compatible = "atmel,at86rf230", },
1646 { .compatible = "atmel,at86rf231", },
1647 { .compatible = "atmel,at86rf233", },
1648 { .compatible = "atmel,at86rf212", },
1649 { },
1650};
1651MODULE_DEVICE_TABLE(of, at86rf230_of_match);
1652
1653static const struct spi_device_id at86rf230_device_id[] = {
1654 { .name = "at86rf230", },
1655 { .name = "at86rf231", },
1656 { .name = "at86rf233", },
1657 { .name = "at86rf212", },
1658 { },
1659};
1660MODULE_DEVICE_TABLE(spi, at86rf230_device_id);
1661
1662static struct spi_driver at86rf230_driver = {
1663 .id_table = at86rf230_device_id,
1664 .driver = {
1665 .of_match_table = at86rf230_of_match,
1666 .name = "at86rf230",
1667 },
1668 .probe = at86rf230_probe,
1669 .remove = at86rf230_remove,
1670};
1671
1672module_spi_driver(at86rf230_driver);
1673
1674MODULE_DESCRIPTION("AT86RF230 Transceiver Driver");
1675MODULE_LICENSE("GPL v2");
1/*
2 * AT86RF230/RF231 driver
3 *
4 * Copyright (C) 2009-2012 Siemens AG
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2
8 * as published by the Free Software Foundation.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * Written by:
16 * Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
17 * Alexander Smirnov <alex.bluesman.smirnov@gmail.com>
18 * Alexander Aring <aar@pengutronix.de>
19 */
20#include <linux/kernel.h>
21#include <linux/module.h>
22#include <linux/hrtimer.h>
23#include <linux/jiffies.h>
24#include <linux/interrupt.h>
25#include <linux/irq.h>
26#include <linux/gpio.h>
27#include <linux/delay.h>
28#include <linux/spi/spi.h>
29#include <linux/spi/at86rf230.h>
30#include <linux/regmap.h>
31#include <linux/skbuff.h>
32#include <linux/of_gpio.h>
33#include <linux/ieee802154.h>
34#include <linux/debugfs.h>
35
36#include <net/mac802154.h>
37#include <net/cfg802154.h>
38
39#include "at86rf230.h"
40
41struct at86rf230_local;
42/* at86rf2xx chip depend data.
43 * All timings are in us.
44 */
45struct at86rf2xx_chip_data {
46 u16 t_sleep_cycle;
47 u16 t_channel_switch;
48 u16 t_reset_to_off;
49 u16 t_off_to_aack;
50 u16 t_off_to_tx_on;
51 u16 t_off_to_sleep;
52 u16 t_sleep_to_off;
53 u16 t_frame;
54 u16 t_p_ack;
55 int rssi_base_val;
56
57 int (*set_channel)(struct at86rf230_local *, u8, u8);
58 int (*set_txpower)(struct at86rf230_local *, s32);
59};
60
61#define AT86RF2XX_MAX_BUF (127 + 3)
62/* tx retries to access the TX_ON state
63 * if it's above then force change will be started.
64 *
65 * We assume the max_frame_retries (7) value of 802.15.4 here.
66 */
67#define AT86RF2XX_MAX_TX_RETRIES 7
68/* We use the recommended 5 minutes timeout to recalibrate */
69#define AT86RF2XX_CAL_LOOP_TIMEOUT (5 * 60 * HZ)
70
71struct at86rf230_state_change {
72 struct at86rf230_local *lp;
73 int irq;
74
75 struct hrtimer timer;
76 struct spi_message msg;
77 struct spi_transfer trx;
78 u8 buf[AT86RF2XX_MAX_BUF];
79
80 void (*complete)(void *context);
81 u8 from_state;
82 u8 to_state;
83
84 bool free;
85};
86
87struct at86rf230_trac {
88 u64 success;
89 u64 success_data_pending;
90 u64 success_wait_for_ack;
91 u64 channel_access_failure;
92 u64 no_ack;
93 u64 invalid;
94};
95
96struct at86rf230_local {
97 struct spi_device *spi;
98
99 struct ieee802154_hw *hw;
100 struct at86rf2xx_chip_data *data;
101 struct regmap *regmap;
102 int slp_tr;
103 bool sleep;
104
105 struct completion state_complete;
106 struct at86rf230_state_change state;
107
108 unsigned long cal_timeout;
109 bool is_tx;
110 bool is_tx_from_off;
111 u8 tx_retry;
112 struct sk_buff *tx_skb;
113 struct at86rf230_state_change tx;
114
115 struct at86rf230_trac trac;
116};
117
118#define AT86RF2XX_NUMREGS 0x3F
119
120static void
121at86rf230_async_state_change(struct at86rf230_local *lp,
122 struct at86rf230_state_change *ctx,
123 const u8 state, void (*complete)(void *context));
124
125static inline void
126at86rf230_sleep(struct at86rf230_local *lp)
127{
128 if (gpio_is_valid(lp->slp_tr)) {
129 gpio_set_value(lp->slp_tr, 1);
130 usleep_range(lp->data->t_off_to_sleep,
131 lp->data->t_off_to_sleep + 10);
132 lp->sleep = true;
133 }
134}
135
136static inline void
137at86rf230_awake(struct at86rf230_local *lp)
138{
139 if (gpio_is_valid(lp->slp_tr)) {
140 gpio_set_value(lp->slp_tr, 0);
141 usleep_range(lp->data->t_sleep_to_off,
142 lp->data->t_sleep_to_off + 100);
143 lp->sleep = false;
144 }
145}
146
147static inline int
148__at86rf230_write(struct at86rf230_local *lp,
149 unsigned int addr, unsigned int data)
150{
151 bool sleep = lp->sleep;
152 int ret;
153
154 /* awake for register setting if sleep */
155 if (sleep)
156 at86rf230_awake(lp);
157
158 ret = regmap_write(lp->regmap, addr, data);
159
160 /* sleep again if was sleeping */
161 if (sleep)
162 at86rf230_sleep(lp);
163
164 return ret;
165}
166
167static inline int
168__at86rf230_read(struct at86rf230_local *lp,
169 unsigned int addr, unsigned int *data)
170{
171 bool sleep = lp->sleep;
172 int ret;
173
174 /* awake for register setting if sleep */
175 if (sleep)
176 at86rf230_awake(lp);
177
178 ret = regmap_read(lp->regmap, addr, data);
179
180 /* sleep again if was sleeping */
181 if (sleep)
182 at86rf230_sleep(lp);
183
184 return ret;
185}
186
187static inline int
188at86rf230_read_subreg(struct at86rf230_local *lp,
189 unsigned int addr, unsigned int mask,
190 unsigned int shift, unsigned int *data)
191{
192 int rc;
193
194 rc = __at86rf230_read(lp, addr, data);
195 if (!rc)
196 *data = (*data & mask) >> shift;
197
198 return rc;
199}
200
201static inline int
202at86rf230_write_subreg(struct at86rf230_local *lp,
203 unsigned int addr, unsigned int mask,
204 unsigned int shift, unsigned int data)
205{
206 bool sleep = lp->sleep;
207 int ret;
208
209 /* awake for register setting if sleep */
210 if (sleep)
211 at86rf230_awake(lp);
212
213 ret = regmap_update_bits(lp->regmap, addr, mask, data << shift);
214
215 /* sleep again if was sleeping */
216 if (sleep)
217 at86rf230_sleep(lp);
218
219 return ret;
220}
221
222static inline void
223at86rf230_slp_tr_rising_edge(struct at86rf230_local *lp)
224{
225 gpio_set_value(lp->slp_tr, 1);
226 udelay(1);
227 gpio_set_value(lp->slp_tr, 0);
228}
229
230static bool
231at86rf230_reg_writeable(struct device *dev, unsigned int reg)
232{
233 switch (reg) {
234 case RG_TRX_STATE:
235 case RG_TRX_CTRL_0:
236 case RG_TRX_CTRL_1:
237 case RG_PHY_TX_PWR:
238 case RG_PHY_ED_LEVEL:
239 case RG_PHY_CC_CCA:
240 case RG_CCA_THRES:
241 case RG_RX_CTRL:
242 case RG_SFD_VALUE:
243 case RG_TRX_CTRL_2:
244 case RG_ANT_DIV:
245 case RG_IRQ_MASK:
246 case RG_VREG_CTRL:
247 case RG_BATMON:
248 case RG_XOSC_CTRL:
249 case RG_RX_SYN:
250 case RG_XAH_CTRL_1:
251 case RG_FTN_CTRL:
252 case RG_PLL_CF:
253 case RG_PLL_DCU:
254 case RG_SHORT_ADDR_0:
255 case RG_SHORT_ADDR_1:
256 case RG_PAN_ID_0:
257 case RG_PAN_ID_1:
258 case RG_IEEE_ADDR_0:
259 case RG_IEEE_ADDR_1:
260 case RG_IEEE_ADDR_2:
261 case RG_IEEE_ADDR_3:
262 case RG_IEEE_ADDR_4:
263 case RG_IEEE_ADDR_5:
264 case RG_IEEE_ADDR_6:
265 case RG_IEEE_ADDR_7:
266 case RG_XAH_CTRL_0:
267 case RG_CSMA_SEED_0:
268 case RG_CSMA_SEED_1:
269 case RG_CSMA_BE:
270 return true;
271 default:
272 return false;
273 }
274}
275
276static bool
277at86rf230_reg_readable(struct device *dev, unsigned int reg)
278{
279 bool rc;
280
281 /* all writeable are also readable */
282 rc = at86rf230_reg_writeable(dev, reg);
283 if (rc)
284 return rc;
285
286 /* readonly regs */
287 switch (reg) {
288 case RG_TRX_STATUS:
289 case RG_PHY_RSSI:
290 case RG_IRQ_STATUS:
291 case RG_PART_NUM:
292 case RG_VERSION_NUM:
293 case RG_MAN_ID_1:
294 case RG_MAN_ID_0:
295 return true;
296 default:
297 return false;
298 }
299}
300
301static bool
302at86rf230_reg_volatile(struct device *dev, unsigned int reg)
303{
304 /* can be changed during runtime */
305 switch (reg) {
306 case RG_TRX_STATUS:
307 case RG_TRX_STATE:
308 case RG_PHY_RSSI:
309 case RG_PHY_ED_LEVEL:
310 case RG_IRQ_STATUS:
311 case RG_VREG_CTRL:
312 case RG_PLL_CF:
313 case RG_PLL_DCU:
314 return true;
315 default:
316 return false;
317 }
318}
319
320static bool
321at86rf230_reg_precious(struct device *dev, unsigned int reg)
322{
323 /* don't clear irq line on read */
324 switch (reg) {
325 case RG_IRQ_STATUS:
326 return true;
327 default:
328 return false;
329 }
330}
331
332static const struct regmap_config at86rf230_regmap_spi_config = {
333 .reg_bits = 8,
334 .val_bits = 8,
335 .write_flag_mask = CMD_REG | CMD_WRITE,
336 .read_flag_mask = CMD_REG,
337 .cache_type = REGCACHE_RBTREE,
338 .max_register = AT86RF2XX_NUMREGS,
339 .writeable_reg = at86rf230_reg_writeable,
340 .readable_reg = at86rf230_reg_readable,
341 .volatile_reg = at86rf230_reg_volatile,
342 .precious_reg = at86rf230_reg_precious,
343};
344
345static void
346at86rf230_async_error_recover_complete(void *context)
347{
348 struct at86rf230_state_change *ctx = context;
349 struct at86rf230_local *lp = ctx->lp;
350
351 if (ctx->free)
352 kfree(ctx);
353
354 ieee802154_wake_queue(lp->hw);
355}
356
357static void
358at86rf230_async_error_recover(void *context)
359{
360 struct at86rf230_state_change *ctx = context;
361 struct at86rf230_local *lp = ctx->lp;
362
363 lp->is_tx = 0;
364 at86rf230_async_state_change(lp, ctx, STATE_RX_AACK_ON,
365 at86rf230_async_error_recover_complete);
366}
367
368static inline void
369at86rf230_async_error(struct at86rf230_local *lp,
370 struct at86rf230_state_change *ctx, int rc)
371{
372 dev_err(&lp->spi->dev, "spi_async error %d\n", rc);
373
374 at86rf230_async_state_change(lp, ctx, STATE_FORCE_TRX_OFF,
375 at86rf230_async_error_recover);
376}
377
378/* Generic function to get some register value in async mode */
379static void
380at86rf230_async_read_reg(struct at86rf230_local *lp, u8 reg,
381 struct at86rf230_state_change *ctx,
382 void (*complete)(void *context))
383{
384 int rc;
385
386 u8 *tx_buf = ctx->buf;
387
388 tx_buf[0] = (reg & CMD_REG_MASK) | CMD_REG;
389 ctx->msg.complete = complete;
390 rc = spi_async(lp->spi, &ctx->msg);
391 if (rc)
392 at86rf230_async_error(lp, ctx, rc);
393}
394
395static void
396at86rf230_async_write_reg(struct at86rf230_local *lp, u8 reg, u8 val,
397 struct at86rf230_state_change *ctx,
398 void (*complete)(void *context))
399{
400 int rc;
401
402 ctx->buf[0] = (reg & CMD_REG_MASK) | CMD_REG | CMD_WRITE;
403 ctx->buf[1] = val;
404 ctx->msg.complete = complete;
405 rc = spi_async(lp->spi, &ctx->msg);
406 if (rc)
407 at86rf230_async_error(lp, ctx, rc);
408}
409
410static void
411at86rf230_async_state_assert(void *context)
412{
413 struct at86rf230_state_change *ctx = context;
414 struct at86rf230_local *lp = ctx->lp;
415 const u8 *buf = ctx->buf;
416 const u8 trx_state = buf[1] & TRX_STATE_MASK;
417
418 /* Assert state change */
419 if (trx_state != ctx->to_state) {
420 /* Special handling if transceiver state is in
421 * STATE_BUSY_RX_AACK and a SHR was detected.
422 */
423 if (trx_state == STATE_BUSY_RX_AACK) {
424 /* Undocumented race condition. If we send a state
425 * change to STATE_RX_AACK_ON the transceiver could
426 * change his state automatically to STATE_BUSY_RX_AACK
427 * if a SHR was detected. This is not an error, but we
428 * can't assert this.
429 */
430 if (ctx->to_state == STATE_RX_AACK_ON)
431 goto done;
432
433 /* If we change to STATE_TX_ON without forcing and
434 * transceiver state is STATE_BUSY_RX_AACK, we wait
435 * 'tFrame + tPAck' receiving time. In this time the
436 * PDU should be received. If the transceiver is still
437 * in STATE_BUSY_RX_AACK, we run a force state change
438 * to STATE_TX_ON. This is a timeout handling, if the
439 * transceiver stucks in STATE_BUSY_RX_AACK.
440 *
441 * Additional we do several retries to try to get into
442 * TX_ON state without forcing. If the retries are
443 * higher or equal than AT86RF2XX_MAX_TX_RETRIES we
444 * will do a force change.
445 */
446 if (ctx->to_state == STATE_TX_ON ||
447 ctx->to_state == STATE_TRX_OFF) {
448 u8 state = ctx->to_state;
449
450 if (lp->tx_retry >= AT86RF2XX_MAX_TX_RETRIES)
451 state = STATE_FORCE_TRX_OFF;
452 lp->tx_retry++;
453
454 at86rf230_async_state_change(lp, ctx, state,
455 ctx->complete);
456 return;
457 }
458 }
459
460 dev_warn(&lp->spi->dev, "unexcept state change from 0x%02x to 0x%02x. Actual state: 0x%02x\n",
461 ctx->from_state, ctx->to_state, trx_state);
462 }
463
464done:
465 if (ctx->complete)
466 ctx->complete(context);
467}
468
469static enum hrtimer_restart at86rf230_async_state_timer(struct hrtimer *timer)
470{
471 struct at86rf230_state_change *ctx =
472 container_of(timer, struct at86rf230_state_change, timer);
473 struct at86rf230_local *lp = ctx->lp;
474
475 at86rf230_async_read_reg(lp, RG_TRX_STATUS, ctx,
476 at86rf230_async_state_assert);
477
478 return HRTIMER_NORESTART;
479}
480
481/* Do state change timing delay. */
482static void
483at86rf230_async_state_delay(void *context)
484{
485 struct at86rf230_state_change *ctx = context;
486 struct at86rf230_local *lp = ctx->lp;
487 struct at86rf2xx_chip_data *c = lp->data;
488 bool force = false;
489 ktime_t tim;
490
491 /* The force state changes are will show as normal states in the
492 * state status subregister. We change the to_state to the
493 * corresponding one and remember if it was a force change, this
494 * differs if we do a state change from STATE_BUSY_RX_AACK.
495 */
496 switch (ctx->to_state) {
497 case STATE_FORCE_TX_ON:
498 ctx->to_state = STATE_TX_ON;
499 force = true;
500 break;
501 case STATE_FORCE_TRX_OFF:
502 ctx->to_state = STATE_TRX_OFF;
503 force = true;
504 break;
505 default:
506 break;
507 }
508
509 switch (ctx->from_state) {
510 case STATE_TRX_OFF:
511 switch (ctx->to_state) {
512 case STATE_RX_AACK_ON:
513 tim = c->t_off_to_aack * NSEC_PER_USEC;
514 /* state change from TRX_OFF to RX_AACK_ON to do a
515 * calibration, we need to reset the timeout for the
516 * next one.
517 */
518 lp->cal_timeout = jiffies + AT86RF2XX_CAL_LOOP_TIMEOUT;
519 goto change;
520 case STATE_TX_ARET_ON:
521 case STATE_TX_ON:
522 tim = c->t_off_to_tx_on * NSEC_PER_USEC;
523 /* state change from TRX_OFF to TX_ON or ARET_ON to do
524 * a calibration, we need to reset the timeout for the
525 * next one.
526 */
527 lp->cal_timeout = jiffies + AT86RF2XX_CAL_LOOP_TIMEOUT;
528 goto change;
529 default:
530 break;
531 }
532 break;
533 case STATE_BUSY_RX_AACK:
534 switch (ctx->to_state) {
535 case STATE_TRX_OFF:
536 case STATE_TX_ON:
537 /* Wait for worst case receiving time if we
538 * didn't make a force change from BUSY_RX_AACK
539 * to TX_ON or TRX_OFF.
540 */
541 if (!force) {
542 tim = (c->t_frame + c->t_p_ack) * NSEC_PER_USEC;
543 goto change;
544 }
545 break;
546 default:
547 break;
548 }
549 break;
550 /* Default value, means RESET state */
551 case STATE_P_ON:
552 switch (ctx->to_state) {
553 case STATE_TRX_OFF:
554 tim = c->t_reset_to_off * NSEC_PER_USEC;
555 goto change;
556 default:
557 break;
558 }
559 break;
560 default:
561 break;
562 }
563
564 /* Default delay is 1us in the most cases */
565 udelay(1);
566 at86rf230_async_state_timer(&ctx->timer);
567 return;
568
569change:
570 hrtimer_start(&ctx->timer, tim, HRTIMER_MODE_REL);
571}
572
573static void
574at86rf230_async_state_change_start(void *context)
575{
576 struct at86rf230_state_change *ctx = context;
577 struct at86rf230_local *lp = ctx->lp;
578 u8 *buf = ctx->buf;
579 const u8 trx_state = buf[1] & TRX_STATE_MASK;
580
581 /* Check for "possible" STATE_TRANSITION_IN_PROGRESS */
582 if (trx_state == STATE_TRANSITION_IN_PROGRESS) {
583 udelay(1);
584 at86rf230_async_read_reg(lp, RG_TRX_STATUS, ctx,
585 at86rf230_async_state_change_start);
586 return;
587 }
588
589 /* Check if we already are in the state which we change in */
590 if (trx_state == ctx->to_state) {
591 if (ctx->complete)
592 ctx->complete(context);
593 return;
594 }
595
596 /* Set current state to the context of state change */
597 ctx->from_state = trx_state;
598
599 /* Going into the next step for a state change which do a timing
600 * relevant delay.
601 */
602 at86rf230_async_write_reg(lp, RG_TRX_STATE, ctx->to_state, ctx,
603 at86rf230_async_state_delay);
604}
605
606static void
607at86rf230_async_state_change(struct at86rf230_local *lp,
608 struct at86rf230_state_change *ctx,
609 const u8 state, void (*complete)(void *context))
610{
611 /* Initialization for the state change context */
612 ctx->to_state = state;
613 ctx->complete = complete;
614 at86rf230_async_read_reg(lp, RG_TRX_STATUS, ctx,
615 at86rf230_async_state_change_start);
616}
617
618static void
619at86rf230_sync_state_change_complete(void *context)
620{
621 struct at86rf230_state_change *ctx = context;
622 struct at86rf230_local *lp = ctx->lp;
623
624 complete(&lp->state_complete);
625}
626
627/* This function do a sync framework above the async state change.
628 * Some callbacks of the IEEE 802.15.4 driver interface need to be
629 * handled synchronously.
630 */
631static int
632at86rf230_sync_state_change(struct at86rf230_local *lp, unsigned int state)
633{
634 unsigned long rc;
635
636 at86rf230_async_state_change(lp, &lp->state, state,
637 at86rf230_sync_state_change_complete);
638
639 rc = wait_for_completion_timeout(&lp->state_complete,
640 msecs_to_jiffies(100));
641 if (!rc) {
642 at86rf230_async_error(lp, &lp->state, -ETIMEDOUT);
643 return -ETIMEDOUT;
644 }
645
646 return 0;
647}
648
649static void
650at86rf230_tx_complete(void *context)
651{
652 struct at86rf230_state_change *ctx = context;
653 struct at86rf230_local *lp = ctx->lp;
654
655 ieee802154_xmit_complete(lp->hw, lp->tx_skb, false);
656 kfree(ctx);
657}
658
659static void
660at86rf230_tx_on(void *context)
661{
662 struct at86rf230_state_change *ctx = context;
663 struct at86rf230_local *lp = ctx->lp;
664
665 at86rf230_async_state_change(lp, ctx, STATE_RX_AACK_ON,
666 at86rf230_tx_complete);
667}
668
669static void
670at86rf230_tx_trac_check(void *context)
671{
672 struct at86rf230_state_change *ctx = context;
673 struct at86rf230_local *lp = ctx->lp;
674
675 if (IS_ENABLED(CONFIG_IEEE802154_AT86RF230_DEBUGFS)) {
676 u8 trac = TRAC_MASK(ctx->buf[1]);
677
678 switch (trac) {
679 case TRAC_SUCCESS:
680 lp->trac.success++;
681 break;
682 case TRAC_SUCCESS_DATA_PENDING:
683 lp->trac.success_data_pending++;
684 break;
685 case TRAC_CHANNEL_ACCESS_FAILURE:
686 lp->trac.channel_access_failure++;
687 break;
688 case TRAC_NO_ACK:
689 lp->trac.no_ack++;
690 break;
691 case TRAC_INVALID:
692 lp->trac.invalid++;
693 break;
694 default:
695 WARN_ONCE(1, "received tx trac status %d\n", trac);
696 break;
697 }
698 }
699
700 at86rf230_async_state_change(lp, ctx, STATE_TX_ON, at86rf230_tx_on);
701}
702
703static void
704at86rf230_rx_read_frame_complete(void *context)
705{
706 struct at86rf230_state_change *ctx = context;
707 struct at86rf230_local *lp = ctx->lp;
708 const u8 *buf = ctx->buf;
709 struct sk_buff *skb;
710 u8 len, lqi;
711
712 len = buf[1];
713 if (!ieee802154_is_valid_psdu_len(len)) {
714 dev_vdbg(&lp->spi->dev, "corrupted frame received\n");
715 len = IEEE802154_MTU;
716 }
717 lqi = buf[2 + len];
718
719 skb = dev_alloc_skb(IEEE802154_MTU);
720 if (!skb) {
721 dev_vdbg(&lp->spi->dev, "failed to allocate sk_buff\n");
722 kfree(ctx);
723 return;
724 }
725
726 skb_put_data(skb, buf + 2, len);
727 ieee802154_rx_irqsafe(lp->hw, skb, lqi);
728 kfree(ctx);
729}
730
731static void
732at86rf230_rx_trac_check(void *context)
733{
734 struct at86rf230_state_change *ctx = context;
735 struct at86rf230_local *lp = ctx->lp;
736 u8 *buf = ctx->buf;
737 int rc;
738
739 if (IS_ENABLED(CONFIG_IEEE802154_AT86RF230_DEBUGFS)) {
740 u8 trac = TRAC_MASK(buf[1]);
741
742 switch (trac) {
743 case TRAC_SUCCESS:
744 lp->trac.success++;
745 break;
746 case TRAC_SUCCESS_WAIT_FOR_ACK:
747 lp->trac.success_wait_for_ack++;
748 break;
749 case TRAC_INVALID:
750 lp->trac.invalid++;
751 break;
752 default:
753 WARN_ONCE(1, "received rx trac status %d\n", trac);
754 break;
755 }
756 }
757
758 buf[0] = CMD_FB;
759 ctx->trx.len = AT86RF2XX_MAX_BUF;
760 ctx->msg.complete = at86rf230_rx_read_frame_complete;
761 rc = spi_async(lp->spi, &ctx->msg);
762 if (rc) {
763 ctx->trx.len = 2;
764 at86rf230_async_error(lp, ctx, rc);
765 }
766}
767
768static void
769at86rf230_irq_trx_end(void *context)
770{
771 struct at86rf230_state_change *ctx = context;
772 struct at86rf230_local *lp = ctx->lp;
773
774 if (lp->is_tx) {
775 lp->is_tx = 0;
776 at86rf230_async_read_reg(lp, RG_TRX_STATE, ctx,
777 at86rf230_tx_trac_check);
778 } else {
779 at86rf230_async_read_reg(lp, RG_TRX_STATE, ctx,
780 at86rf230_rx_trac_check);
781 }
782}
783
784static void
785at86rf230_irq_status(void *context)
786{
787 struct at86rf230_state_change *ctx = context;
788 struct at86rf230_local *lp = ctx->lp;
789 const u8 *buf = ctx->buf;
790 u8 irq = buf[1];
791
792 enable_irq(lp->spi->irq);
793
794 if (irq & IRQ_TRX_END) {
795 at86rf230_irq_trx_end(ctx);
796 } else {
797 dev_err(&lp->spi->dev, "not supported irq %02x received\n",
798 irq);
799 kfree(ctx);
800 }
801}
802
803static void
804at86rf230_setup_spi_messages(struct at86rf230_local *lp,
805 struct at86rf230_state_change *state)
806{
807 state->lp = lp;
808 state->irq = lp->spi->irq;
809 spi_message_init(&state->msg);
810 state->msg.context = state;
811 state->trx.len = 2;
812 state->trx.tx_buf = state->buf;
813 state->trx.rx_buf = state->buf;
814 spi_message_add_tail(&state->trx, &state->msg);
815 hrtimer_init(&state->timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
816 state->timer.function = at86rf230_async_state_timer;
817}
818
819static irqreturn_t at86rf230_isr(int irq, void *data)
820{
821 struct at86rf230_local *lp = data;
822 struct at86rf230_state_change *ctx;
823 int rc;
824
825 disable_irq_nosync(irq);
826
827 ctx = kzalloc(sizeof(*ctx), GFP_ATOMIC);
828 if (!ctx) {
829 enable_irq(irq);
830 return IRQ_NONE;
831 }
832
833 at86rf230_setup_spi_messages(lp, ctx);
834 /* tell on error handling to free ctx */
835 ctx->free = true;
836
837 ctx->buf[0] = (RG_IRQ_STATUS & CMD_REG_MASK) | CMD_REG;
838 ctx->msg.complete = at86rf230_irq_status;
839 rc = spi_async(lp->spi, &ctx->msg);
840 if (rc) {
841 at86rf230_async_error(lp, ctx, rc);
842 enable_irq(irq);
843 return IRQ_NONE;
844 }
845
846 return IRQ_HANDLED;
847}
848
849static void
850at86rf230_write_frame_complete(void *context)
851{
852 struct at86rf230_state_change *ctx = context;
853 struct at86rf230_local *lp = ctx->lp;
854
855 ctx->trx.len = 2;
856
857 if (gpio_is_valid(lp->slp_tr))
858 at86rf230_slp_tr_rising_edge(lp);
859 else
860 at86rf230_async_write_reg(lp, RG_TRX_STATE, STATE_BUSY_TX, ctx,
861 NULL);
862}
863
864static void
865at86rf230_write_frame(void *context)
866{
867 struct at86rf230_state_change *ctx = context;
868 struct at86rf230_local *lp = ctx->lp;
869 struct sk_buff *skb = lp->tx_skb;
870 u8 *buf = ctx->buf;
871 int rc;
872
873 lp->is_tx = 1;
874
875 buf[0] = CMD_FB | CMD_WRITE;
876 buf[1] = skb->len + 2;
877 memcpy(buf + 2, skb->data, skb->len);
878 ctx->trx.len = skb->len + 2;
879 ctx->msg.complete = at86rf230_write_frame_complete;
880 rc = spi_async(lp->spi, &ctx->msg);
881 if (rc) {
882 ctx->trx.len = 2;
883 at86rf230_async_error(lp, ctx, rc);
884 }
885}
886
887static void
888at86rf230_xmit_tx_on(void *context)
889{
890 struct at86rf230_state_change *ctx = context;
891 struct at86rf230_local *lp = ctx->lp;
892
893 at86rf230_async_state_change(lp, ctx, STATE_TX_ARET_ON,
894 at86rf230_write_frame);
895}
896
897static void
898at86rf230_xmit_start(void *context)
899{
900 struct at86rf230_state_change *ctx = context;
901 struct at86rf230_local *lp = ctx->lp;
902
903 /* check if we change from off state */
904 if (lp->is_tx_from_off)
905 at86rf230_async_state_change(lp, ctx, STATE_TX_ARET_ON,
906 at86rf230_write_frame);
907 else
908 at86rf230_async_state_change(lp, ctx, STATE_TX_ON,
909 at86rf230_xmit_tx_on);
910}
911
912static int
913at86rf230_xmit(struct ieee802154_hw *hw, struct sk_buff *skb)
914{
915 struct at86rf230_local *lp = hw->priv;
916 struct at86rf230_state_change *ctx = &lp->tx;
917
918 lp->tx_skb = skb;
919 lp->tx_retry = 0;
920
921 /* After 5 minutes in PLL and the same frequency we run again the
922 * calibration loops which is recommended by at86rf2xx datasheets.
923 *
924 * The calibration is initiate by a state change from TRX_OFF
925 * to TX_ON, the lp->cal_timeout should be reinit by state_delay
926 * function then to start in the next 5 minutes.
927 */
928 if (time_is_before_jiffies(lp->cal_timeout)) {
929 lp->is_tx_from_off = true;
930 at86rf230_async_state_change(lp, ctx, STATE_TRX_OFF,
931 at86rf230_xmit_start);
932 } else {
933 lp->is_tx_from_off = false;
934 at86rf230_xmit_start(ctx);
935 }
936
937 return 0;
938}
939
940static int
941at86rf230_ed(struct ieee802154_hw *hw, u8 *level)
942{
943 BUG_ON(!level);
944 *level = 0xbe;
945 return 0;
946}
947
948static int
949at86rf230_start(struct ieee802154_hw *hw)
950{
951 struct at86rf230_local *lp = hw->priv;
952
953 /* reset trac stats on start */
954 if (IS_ENABLED(CONFIG_IEEE802154_AT86RF230_DEBUGFS))
955 memset(&lp->trac, 0, sizeof(struct at86rf230_trac));
956
957 at86rf230_awake(lp);
958 enable_irq(lp->spi->irq);
959
960 return at86rf230_sync_state_change(lp, STATE_RX_AACK_ON);
961}
962
963static void
964at86rf230_stop(struct ieee802154_hw *hw)
965{
966 struct at86rf230_local *lp = hw->priv;
967 u8 csma_seed[2];
968
969 at86rf230_sync_state_change(lp, STATE_FORCE_TRX_OFF);
970
971 disable_irq(lp->spi->irq);
972
973 /* It's recommended to set random new csma_seeds before sleep state.
974 * Makes only sense in the stop callback, not doing this inside of
975 * at86rf230_sleep, this is also used when we don't transmit afterwards
976 * when calling start callback again.
977 */
978 get_random_bytes(csma_seed, ARRAY_SIZE(csma_seed));
979 at86rf230_write_subreg(lp, SR_CSMA_SEED_0, csma_seed[0]);
980 at86rf230_write_subreg(lp, SR_CSMA_SEED_1, csma_seed[1]);
981
982 at86rf230_sleep(lp);
983}
984
985static int
986at86rf23x_set_channel(struct at86rf230_local *lp, u8 page, u8 channel)
987{
988 return at86rf230_write_subreg(lp, SR_CHANNEL, channel);
989}
990
991#define AT86RF2XX_MAX_ED_LEVELS 0xF
992static const s32 at86rf233_ed_levels[AT86RF2XX_MAX_ED_LEVELS + 1] = {
993 -9400, -9200, -9000, -8800, -8600, -8400, -8200, -8000, -7800, -7600,
994 -7400, -7200, -7000, -6800, -6600, -6400,
995};
996
997static const s32 at86rf231_ed_levels[AT86RF2XX_MAX_ED_LEVELS + 1] = {
998 -9100, -8900, -8700, -8500, -8300, -8100, -7900, -7700, -7500, -7300,
999 -7100, -6900, -6700, -6500, -6300, -6100,
1000};
1001
1002static const s32 at86rf212_ed_levels_100[AT86RF2XX_MAX_ED_LEVELS + 1] = {
1003 -10000, -9800, -9600, -9400, -9200, -9000, -8800, -8600, -8400, -8200,
1004 -8000, -7800, -7600, -7400, -7200, -7000,
1005};
1006
1007static const s32 at86rf212_ed_levels_98[AT86RF2XX_MAX_ED_LEVELS + 1] = {
1008 -9800, -9600, -9400, -9200, -9000, -8800, -8600, -8400, -8200, -8000,
1009 -7800, -7600, -7400, -7200, -7000, -6800,
1010};
1011
1012static inline int
1013at86rf212_update_cca_ed_level(struct at86rf230_local *lp, int rssi_base_val)
1014{
1015 unsigned int cca_ed_thres;
1016 int rc;
1017
1018 rc = at86rf230_read_subreg(lp, SR_CCA_ED_THRES, &cca_ed_thres);
1019 if (rc < 0)
1020 return rc;
1021
1022 switch (rssi_base_val) {
1023 case -98:
1024 lp->hw->phy->supported.cca_ed_levels = at86rf212_ed_levels_98;
1025 lp->hw->phy->supported.cca_ed_levels_size = ARRAY_SIZE(at86rf212_ed_levels_98);
1026 lp->hw->phy->cca_ed_level = at86rf212_ed_levels_98[cca_ed_thres];
1027 break;
1028 case -100:
1029 lp->hw->phy->supported.cca_ed_levels = at86rf212_ed_levels_100;
1030 lp->hw->phy->supported.cca_ed_levels_size = ARRAY_SIZE(at86rf212_ed_levels_100);
1031 lp->hw->phy->cca_ed_level = at86rf212_ed_levels_100[cca_ed_thres];
1032 break;
1033 default:
1034 WARN_ON(1);
1035 }
1036
1037 return 0;
1038}
1039
1040static int
1041at86rf212_set_channel(struct at86rf230_local *lp, u8 page, u8 channel)
1042{
1043 int rc;
1044
1045 if (channel == 0)
1046 rc = at86rf230_write_subreg(lp, SR_SUB_MODE, 0);
1047 else
1048 rc = at86rf230_write_subreg(lp, SR_SUB_MODE, 1);
1049 if (rc < 0)
1050 return rc;
1051
1052 if (page == 0) {
1053 rc = at86rf230_write_subreg(lp, SR_BPSK_QPSK, 0);
1054 lp->data->rssi_base_val = -100;
1055 } else {
1056 rc = at86rf230_write_subreg(lp, SR_BPSK_QPSK, 1);
1057 lp->data->rssi_base_val = -98;
1058 }
1059 if (rc < 0)
1060 return rc;
1061
1062 rc = at86rf212_update_cca_ed_level(lp, lp->data->rssi_base_val);
1063 if (rc < 0)
1064 return rc;
1065
1066 /* This sets the symbol_duration according frequency on the 212.
1067 * TODO move this handling while set channel and page in cfg802154.
1068 * We can do that, this timings are according 802.15.4 standard.
1069 * If we do that in cfg802154, this is a more generic calculation.
1070 *
1071 * This should also protected from ifs_timer. Means cancel timer and
1072 * init with a new value. For now, this is okay.
1073 */
1074 if (channel == 0) {
1075 if (page == 0) {
1076 /* SUB:0 and BPSK:0 -> BPSK-20 */
1077 lp->hw->phy->symbol_duration = 50;
1078 } else {
1079 /* SUB:1 and BPSK:0 -> BPSK-40 */
1080 lp->hw->phy->symbol_duration = 25;
1081 }
1082 } else {
1083 if (page == 0)
1084 /* SUB:0 and BPSK:1 -> OQPSK-100/200/400 */
1085 lp->hw->phy->symbol_duration = 40;
1086 else
1087 /* SUB:1 and BPSK:1 -> OQPSK-250/500/1000 */
1088 lp->hw->phy->symbol_duration = 16;
1089 }
1090
1091 lp->hw->phy->lifs_period = IEEE802154_LIFS_PERIOD *
1092 lp->hw->phy->symbol_duration;
1093 lp->hw->phy->sifs_period = IEEE802154_SIFS_PERIOD *
1094 lp->hw->phy->symbol_duration;
1095
1096 return at86rf230_write_subreg(lp, SR_CHANNEL, channel);
1097}
1098
1099static int
1100at86rf230_channel(struct ieee802154_hw *hw, u8 page, u8 channel)
1101{
1102 struct at86rf230_local *lp = hw->priv;
1103 int rc;
1104
1105 rc = lp->data->set_channel(lp, page, channel);
1106 /* Wait for PLL */
1107 usleep_range(lp->data->t_channel_switch,
1108 lp->data->t_channel_switch + 10);
1109
1110 lp->cal_timeout = jiffies + AT86RF2XX_CAL_LOOP_TIMEOUT;
1111 return rc;
1112}
1113
1114static int
1115at86rf230_set_hw_addr_filt(struct ieee802154_hw *hw,
1116 struct ieee802154_hw_addr_filt *filt,
1117 unsigned long changed)
1118{
1119 struct at86rf230_local *lp = hw->priv;
1120
1121 if (changed & IEEE802154_AFILT_SADDR_CHANGED) {
1122 u16 addr = le16_to_cpu(filt->short_addr);
1123
1124 dev_vdbg(&lp->spi->dev,
1125 "at86rf230_set_hw_addr_filt called for saddr\n");
1126 __at86rf230_write(lp, RG_SHORT_ADDR_0, addr);
1127 __at86rf230_write(lp, RG_SHORT_ADDR_1, addr >> 8);
1128 }
1129
1130 if (changed & IEEE802154_AFILT_PANID_CHANGED) {
1131 u16 pan = le16_to_cpu(filt->pan_id);
1132
1133 dev_vdbg(&lp->spi->dev,
1134 "at86rf230_set_hw_addr_filt called for pan id\n");
1135 __at86rf230_write(lp, RG_PAN_ID_0, pan);
1136 __at86rf230_write(lp, RG_PAN_ID_1, pan >> 8);
1137 }
1138
1139 if (changed & IEEE802154_AFILT_IEEEADDR_CHANGED) {
1140 u8 i, addr[8];
1141
1142 memcpy(addr, &filt->ieee_addr, 8);
1143 dev_vdbg(&lp->spi->dev,
1144 "at86rf230_set_hw_addr_filt called for IEEE addr\n");
1145 for (i = 0; i < 8; i++)
1146 __at86rf230_write(lp, RG_IEEE_ADDR_0 + i, addr[i]);
1147 }
1148
1149 if (changed & IEEE802154_AFILT_PANC_CHANGED) {
1150 dev_vdbg(&lp->spi->dev,
1151 "at86rf230_set_hw_addr_filt called for panc change\n");
1152 if (filt->pan_coord)
1153 at86rf230_write_subreg(lp, SR_AACK_I_AM_COORD, 1);
1154 else
1155 at86rf230_write_subreg(lp, SR_AACK_I_AM_COORD, 0);
1156 }
1157
1158 return 0;
1159}
1160
1161#define AT86RF23X_MAX_TX_POWERS 0xF
1162static const s32 at86rf233_powers[AT86RF23X_MAX_TX_POWERS + 1] = {
1163 400, 370, 340, 300, 250, 200, 100, 0, -100, -200, -300, -400, -600,
1164 -800, -1200, -1700,
1165};
1166
1167static const s32 at86rf231_powers[AT86RF23X_MAX_TX_POWERS + 1] = {
1168 300, 280, 230, 180, 130, 70, 0, -100, -200, -300, -400, -500, -700,
1169 -900, -1200, -1700,
1170};
1171
1172#define AT86RF212_MAX_TX_POWERS 0x1F
1173static const s32 at86rf212_powers[AT86RF212_MAX_TX_POWERS + 1] = {
1174 500, 400, 300, 200, 100, 0, -100, -200, -300, -400, -500, -600, -700,
1175 -800, -900, -1000, -1100, -1200, -1300, -1400, -1500, -1600, -1700,
1176 -1800, -1900, -2000, -2100, -2200, -2300, -2400, -2500, -2600,
1177};
1178
1179static int
1180at86rf23x_set_txpower(struct at86rf230_local *lp, s32 mbm)
1181{
1182 u32 i;
1183
1184 for (i = 0; i < lp->hw->phy->supported.tx_powers_size; i++) {
1185 if (lp->hw->phy->supported.tx_powers[i] == mbm)
1186 return at86rf230_write_subreg(lp, SR_TX_PWR_23X, i);
1187 }
1188
1189 return -EINVAL;
1190}
1191
1192static int
1193at86rf212_set_txpower(struct at86rf230_local *lp, s32 mbm)
1194{
1195 u32 i;
1196
1197 for (i = 0; i < lp->hw->phy->supported.tx_powers_size; i++) {
1198 if (lp->hw->phy->supported.tx_powers[i] == mbm)
1199 return at86rf230_write_subreg(lp, SR_TX_PWR_212, i);
1200 }
1201
1202 return -EINVAL;
1203}
1204
1205static int
1206at86rf230_set_txpower(struct ieee802154_hw *hw, s32 mbm)
1207{
1208 struct at86rf230_local *lp = hw->priv;
1209
1210 return lp->data->set_txpower(lp, mbm);
1211}
1212
1213static int
1214at86rf230_set_lbt(struct ieee802154_hw *hw, bool on)
1215{
1216 struct at86rf230_local *lp = hw->priv;
1217
1218 return at86rf230_write_subreg(lp, SR_CSMA_LBT_MODE, on);
1219}
1220
1221static int
1222at86rf230_set_cca_mode(struct ieee802154_hw *hw,
1223 const struct wpan_phy_cca *cca)
1224{
1225 struct at86rf230_local *lp = hw->priv;
1226 u8 val;
1227
1228 /* mapping 802.15.4 to driver spec */
1229 switch (cca->mode) {
1230 case NL802154_CCA_ENERGY:
1231 val = 1;
1232 break;
1233 case NL802154_CCA_CARRIER:
1234 val = 2;
1235 break;
1236 case NL802154_CCA_ENERGY_CARRIER:
1237 switch (cca->opt) {
1238 case NL802154_CCA_OPT_ENERGY_CARRIER_AND:
1239 val = 3;
1240 break;
1241 case NL802154_CCA_OPT_ENERGY_CARRIER_OR:
1242 val = 0;
1243 break;
1244 default:
1245 return -EINVAL;
1246 }
1247 break;
1248 default:
1249 return -EINVAL;
1250 }
1251
1252 return at86rf230_write_subreg(lp, SR_CCA_MODE, val);
1253}
1254
1255
1256static int
1257at86rf230_set_cca_ed_level(struct ieee802154_hw *hw, s32 mbm)
1258{
1259 struct at86rf230_local *lp = hw->priv;
1260 u32 i;
1261
1262 for (i = 0; i < hw->phy->supported.cca_ed_levels_size; i++) {
1263 if (hw->phy->supported.cca_ed_levels[i] == mbm)
1264 return at86rf230_write_subreg(lp, SR_CCA_ED_THRES, i);
1265 }
1266
1267 return -EINVAL;
1268}
1269
1270static int
1271at86rf230_set_csma_params(struct ieee802154_hw *hw, u8 min_be, u8 max_be,
1272 u8 retries)
1273{
1274 struct at86rf230_local *lp = hw->priv;
1275 int rc;
1276
1277 rc = at86rf230_write_subreg(lp, SR_MIN_BE, min_be);
1278 if (rc)
1279 return rc;
1280
1281 rc = at86rf230_write_subreg(lp, SR_MAX_BE, max_be);
1282 if (rc)
1283 return rc;
1284
1285 return at86rf230_write_subreg(lp, SR_MAX_CSMA_RETRIES, retries);
1286}
1287
1288static int
1289at86rf230_set_frame_retries(struct ieee802154_hw *hw, s8 retries)
1290{
1291 struct at86rf230_local *lp = hw->priv;
1292
1293 return at86rf230_write_subreg(lp, SR_MAX_FRAME_RETRIES, retries);
1294}
1295
1296static int
1297at86rf230_set_promiscuous_mode(struct ieee802154_hw *hw, const bool on)
1298{
1299 struct at86rf230_local *lp = hw->priv;
1300 int rc;
1301
1302 if (on) {
1303 rc = at86rf230_write_subreg(lp, SR_AACK_DIS_ACK, 1);
1304 if (rc < 0)
1305 return rc;
1306
1307 rc = at86rf230_write_subreg(lp, SR_AACK_PROM_MODE, 1);
1308 if (rc < 0)
1309 return rc;
1310 } else {
1311 rc = at86rf230_write_subreg(lp, SR_AACK_PROM_MODE, 0);
1312 if (rc < 0)
1313 return rc;
1314
1315 rc = at86rf230_write_subreg(lp, SR_AACK_DIS_ACK, 0);
1316 if (rc < 0)
1317 return rc;
1318 }
1319
1320 return 0;
1321}
1322
1323static const struct ieee802154_ops at86rf230_ops = {
1324 .owner = THIS_MODULE,
1325 .xmit_async = at86rf230_xmit,
1326 .ed = at86rf230_ed,
1327 .set_channel = at86rf230_channel,
1328 .start = at86rf230_start,
1329 .stop = at86rf230_stop,
1330 .set_hw_addr_filt = at86rf230_set_hw_addr_filt,
1331 .set_txpower = at86rf230_set_txpower,
1332 .set_lbt = at86rf230_set_lbt,
1333 .set_cca_mode = at86rf230_set_cca_mode,
1334 .set_cca_ed_level = at86rf230_set_cca_ed_level,
1335 .set_csma_params = at86rf230_set_csma_params,
1336 .set_frame_retries = at86rf230_set_frame_retries,
1337 .set_promiscuous_mode = at86rf230_set_promiscuous_mode,
1338};
1339
1340static struct at86rf2xx_chip_data at86rf233_data = {
1341 .t_sleep_cycle = 330,
1342 .t_channel_switch = 11,
1343 .t_reset_to_off = 26,
1344 .t_off_to_aack = 80,
1345 .t_off_to_tx_on = 80,
1346 .t_off_to_sleep = 35,
1347 .t_sleep_to_off = 1000,
1348 .t_frame = 4096,
1349 .t_p_ack = 545,
1350 .rssi_base_val = -94,
1351 .set_channel = at86rf23x_set_channel,
1352 .set_txpower = at86rf23x_set_txpower,
1353};
1354
1355static struct at86rf2xx_chip_data at86rf231_data = {
1356 .t_sleep_cycle = 330,
1357 .t_channel_switch = 24,
1358 .t_reset_to_off = 37,
1359 .t_off_to_aack = 110,
1360 .t_off_to_tx_on = 110,
1361 .t_off_to_sleep = 35,
1362 .t_sleep_to_off = 1000,
1363 .t_frame = 4096,
1364 .t_p_ack = 545,
1365 .rssi_base_val = -91,
1366 .set_channel = at86rf23x_set_channel,
1367 .set_txpower = at86rf23x_set_txpower,
1368};
1369
1370static struct at86rf2xx_chip_data at86rf212_data = {
1371 .t_sleep_cycle = 330,
1372 .t_channel_switch = 11,
1373 .t_reset_to_off = 26,
1374 .t_off_to_aack = 200,
1375 .t_off_to_tx_on = 200,
1376 .t_off_to_sleep = 35,
1377 .t_sleep_to_off = 1000,
1378 .t_frame = 4096,
1379 .t_p_ack = 545,
1380 .rssi_base_val = -100,
1381 .set_channel = at86rf212_set_channel,
1382 .set_txpower = at86rf212_set_txpower,
1383};
1384
1385static int at86rf230_hw_init(struct at86rf230_local *lp, u8 xtal_trim)
1386{
1387 int rc, irq_type, irq_pol = IRQ_ACTIVE_HIGH;
1388 unsigned int dvdd;
1389 u8 csma_seed[2];
1390
1391 rc = at86rf230_sync_state_change(lp, STATE_FORCE_TRX_OFF);
1392 if (rc)
1393 return rc;
1394
1395 irq_type = irq_get_trigger_type(lp->spi->irq);
1396 if (irq_type == IRQ_TYPE_EDGE_FALLING ||
1397 irq_type == IRQ_TYPE_LEVEL_LOW)
1398 irq_pol = IRQ_ACTIVE_LOW;
1399
1400 rc = at86rf230_write_subreg(lp, SR_IRQ_POLARITY, irq_pol);
1401 if (rc)
1402 return rc;
1403
1404 rc = at86rf230_write_subreg(lp, SR_RX_SAFE_MODE, 1);
1405 if (rc)
1406 return rc;
1407
1408 rc = at86rf230_write_subreg(lp, SR_IRQ_MASK, IRQ_TRX_END);
1409 if (rc)
1410 return rc;
1411
1412 /* reset values differs in at86rf231 and at86rf233 */
1413 rc = at86rf230_write_subreg(lp, SR_IRQ_MASK_MODE, 0);
1414 if (rc)
1415 return rc;
1416
1417 get_random_bytes(csma_seed, ARRAY_SIZE(csma_seed));
1418 rc = at86rf230_write_subreg(lp, SR_CSMA_SEED_0, csma_seed[0]);
1419 if (rc)
1420 return rc;
1421 rc = at86rf230_write_subreg(lp, SR_CSMA_SEED_1, csma_seed[1]);
1422 if (rc)
1423 return rc;
1424
1425 /* CLKM changes are applied immediately */
1426 rc = at86rf230_write_subreg(lp, SR_CLKM_SHA_SEL, 0x00);
1427 if (rc)
1428 return rc;
1429
1430 /* Turn CLKM Off */
1431 rc = at86rf230_write_subreg(lp, SR_CLKM_CTRL, 0x00);
1432 if (rc)
1433 return rc;
1434 /* Wait the next SLEEP cycle */
1435 usleep_range(lp->data->t_sleep_cycle,
1436 lp->data->t_sleep_cycle + 100);
1437
1438 /* xtal_trim value is calculated by:
1439 * CL = 0.5 * (CX + CTRIM + CPAR)
1440 *
1441 * whereas:
1442 * CL = capacitor of used crystal
1443 * CX = connected capacitors at xtal pins
1444 * CPAR = in all at86rf2xx datasheets this is a constant value 3 pF,
1445 * but this is different on each board setup. You need to fine
1446 * tuning this value via CTRIM.
1447 * CTRIM = variable capacitor setting. Resolution is 0.3 pF range is
1448 * 0 pF upto 4.5 pF.
1449 *
1450 * Examples:
1451 * atben transceiver:
1452 *
1453 * CL = 8 pF
1454 * CX = 12 pF
1455 * CPAR = 3 pF (We assume the magic constant from datasheet)
1456 * CTRIM = 0.9 pF
1457 *
1458 * (12+0.9+3)/2 = 7.95 which is nearly at 8 pF
1459 *
1460 * xtal_trim = 0x3
1461 *
1462 * openlabs transceiver:
1463 *
1464 * CL = 16 pF
1465 * CX = 22 pF
1466 * CPAR = 3 pF (We assume the magic constant from datasheet)
1467 * CTRIM = 4.5 pF
1468 *
1469 * (22+4.5+3)/2 = 14.75 which is the nearest value to 16 pF
1470 *
1471 * xtal_trim = 0xf
1472 */
1473 rc = at86rf230_write_subreg(lp, SR_XTAL_TRIM, xtal_trim);
1474 if (rc)
1475 return rc;
1476
1477 rc = at86rf230_read_subreg(lp, SR_DVDD_OK, &dvdd);
1478 if (rc)
1479 return rc;
1480 if (!dvdd) {
1481 dev_err(&lp->spi->dev, "DVDD error\n");
1482 return -EINVAL;
1483 }
1484
1485 /* Force setting slotted operation bit to 0. Sometimes the atben
1486 * sets this bit and I don't know why. We set this always force
1487 * to zero while probing.
1488 */
1489 return at86rf230_write_subreg(lp, SR_SLOTTED_OPERATION, 0);
1490}
1491
1492static int
1493at86rf230_get_pdata(struct spi_device *spi, int *rstn, int *slp_tr,
1494 u8 *xtal_trim)
1495{
1496 struct at86rf230_platform_data *pdata = spi->dev.platform_data;
1497 int ret;
1498
1499 if (!IS_ENABLED(CONFIG_OF) || !spi->dev.of_node) {
1500 if (!pdata)
1501 return -ENOENT;
1502
1503 *rstn = pdata->rstn;
1504 *slp_tr = pdata->slp_tr;
1505 *xtal_trim = pdata->xtal_trim;
1506 return 0;
1507 }
1508
1509 *rstn = of_get_named_gpio(spi->dev.of_node, "reset-gpio", 0);
1510 *slp_tr = of_get_named_gpio(spi->dev.of_node, "sleep-gpio", 0);
1511 ret = of_property_read_u8(spi->dev.of_node, "xtal-trim", xtal_trim);
1512 if (ret < 0 && ret != -EINVAL)
1513 return ret;
1514
1515 return 0;
1516}
1517
1518static int
1519at86rf230_detect_device(struct at86rf230_local *lp)
1520{
1521 unsigned int part, version, val;
1522 u16 man_id = 0;
1523 const char *chip;
1524 int rc;
1525
1526 rc = __at86rf230_read(lp, RG_MAN_ID_0, &val);
1527 if (rc)
1528 return rc;
1529 man_id |= val;
1530
1531 rc = __at86rf230_read(lp, RG_MAN_ID_1, &val);
1532 if (rc)
1533 return rc;
1534 man_id |= (val << 8);
1535
1536 rc = __at86rf230_read(lp, RG_PART_NUM, &part);
1537 if (rc)
1538 return rc;
1539
1540 rc = __at86rf230_read(lp, RG_VERSION_NUM, &version);
1541 if (rc)
1542 return rc;
1543
1544 if (man_id != 0x001f) {
1545 dev_err(&lp->spi->dev, "Non-Atmel dev found (MAN_ID %02x %02x)\n",
1546 man_id >> 8, man_id & 0xFF);
1547 return -EINVAL;
1548 }
1549
1550 lp->hw->flags = IEEE802154_HW_TX_OMIT_CKSUM |
1551 IEEE802154_HW_CSMA_PARAMS |
1552 IEEE802154_HW_FRAME_RETRIES | IEEE802154_HW_AFILT |
1553 IEEE802154_HW_PROMISCUOUS;
1554
1555 lp->hw->phy->flags = WPAN_PHY_FLAG_TXPOWER |
1556 WPAN_PHY_FLAG_CCA_ED_LEVEL |
1557 WPAN_PHY_FLAG_CCA_MODE;
1558
1559 lp->hw->phy->supported.cca_modes = BIT(NL802154_CCA_ENERGY) |
1560 BIT(NL802154_CCA_CARRIER) | BIT(NL802154_CCA_ENERGY_CARRIER);
1561 lp->hw->phy->supported.cca_opts = BIT(NL802154_CCA_OPT_ENERGY_CARRIER_AND) |
1562 BIT(NL802154_CCA_OPT_ENERGY_CARRIER_OR);
1563
1564 lp->hw->phy->cca.mode = NL802154_CCA_ENERGY;
1565
1566 switch (part) {
1567 case 2:
1568 chip = "at86rf230";
1569 rc = -ENOTSUPP;
1570 goto not_supp;
1571 case 3:
1572 chip = "at86rf231";
1573 lp->data = &at86rf231_data;
1574 lp->hw->phy->supported.channels[0] = 0x7FFF800;
1575 lp->hw->phy->current_channel = 11;
1576 lp->hw->phy->symbol_duration = 16;
1577 lp->hw->phy->supported.tx_powers = at86rf231_powers;
1578 lp->hw->phy->supported.tx_powers_size = ARRAY_SIZE(at86rf231_powers);
1579 lp->hw->phy->supported.cca_ed_levels = at86rf231_ed_levels;
1580 lp->hw->phy->supported.cca_ed_levels_size = ARRAY_SIZE(at86rf231_ed_levels);
1581 break;
1582 case 7:
1583 chip = "at86rf212";
1584 lp->data = &at86rf212_data;
1585 lp->hw->flags |= IEEE802154_HW_LBT;
1586 lp->hw->phy->supported.channels[0] = 0x00007FF;
1587 lp->hw->phy->supported.channels[2] = 0x00007FF;
1588 lp->hw->phy->current_channel = 5;
1589 lp->hw->phy->symbol_duration = 25;
1590 lp->hw->phy->supported.lbt = NL802154_SUPPORTED_BOOL_BOTH;
1591 lp->hw->phy->supported.tx_powers = at86rf212_powers;
1592 lp->hw->phy->supported.tx_powers_size = ARRAY_SIZE(at86rf212_powers);
1593 lp->hw->phy->supported.cca_ed_levels = at86rf212_ed_levels_100;
1594 lp->hw->phy->supported.cca_ed_levels_size = ARRAY_SIZE(at86rf212_ed_levels_100);
1595 break;
1596 case 11:
1597 chip = "at86rf233";
1598 lp->data = &at86rf233_data;
1599 lp->hw->phy->supported.channels[0] = 0x7FFF800;
1600 lp->hw->phy->current_channel = 13;
1601 lp->hw->phy->symbol_duration = 16;
1602 lp->hw->phy->supported.tx_powers = at86rf233_powers;
1603 lp->hw->phy->supported.tx_powers_size = ARRAY_SIZE(at86rf233_powers);
1604 lp->hw->phy->supported.cca_ed_levels = at86rf233_ed_levels;
1605 lp->hw->phy->supported.cca_ed_levels_size = ARRAY_SIZE(at86rf233_ed_levels);
1606 break;
1607 default:
1608 chip = "unknown";
1609 rc = -ENOTSUPP;
1610 goto not_supp;
1611 }
1612
1613 lp->hw->phy->cca_ed_level = lp->hw->phy->supported.cca_ed_levels[7];
1614 lp->hw->phy->transmit_power = lp->hw->phy->supported.tx_powers[0];
1615
1616not_supp:
1617 dev_info(&lp->spi->dev, "Detected %s chip version %d\n", chip, version);
1618
1619 return rc;
1620}
1621
1622#ifdef CONFIG_IEEE802154_AT86RF230_DEBUGFS
1623static struct dentry *at86rf230_debugfs_root;
1624
1625static int at86rf230_stats_show(struct seq_file *file, void *offset)
1626{
1627 struct at86rf230_local *lp = file->private;
1628
1629 seq_printf(file, "SUCCESS:\t\t%8llu\n", lp->trac.success);
1630 seq_printf(file, "SUCCESS_DATA_PENDING:\t%8llu\n",
1631 lp->trac.success_data_pending);
1632 seq_printf(file, "SUCCESS_WAIT_FOR_ACK:\t%8llu\n",
1633 lp->trac.success_wait_for_ack);
1634 seq_printf(file, "CHANNEL_ACCESS_FAILURE:\t%8llu\n",
1635 lp->trac.channel_access_failure);
1636 seq_printf(file, "NO_ACK:\t\t\t%8llu\n", lp->trac.no_ack);
1637 seq_printf(file, "INVALID:\t\t%8llu\n", lp->trac.invalid);
1638 return 0;
1639}
1640
1641static int at86rf230_stats_open(struct inode *inode, struct file *file)
1642{
1643 return single_open(file, at86rf230_stats_show, inode->i_private);
1644}
1645
1646static const struct file_operations at86rf230_stats_fops = {
1647 .open = at86rf230_stats_open,
1648 .read = seq_read,
1649 .llseek = seq_lseek,
1650 .release = single_release,
1651};
1652
1653static int at86rf230_debugfs_init(struct at86rf230_local *lp)
1654{
1655 char debugfs_dir_name[DNAME_INLINE_LEN + 1] = "at86rf230-";
1656 struct dentry *stats;
1657
1658 strncat(debugfs_dir_name, dev_name(&lp->spi->dev), DNAME_INLINE_LEN);
1659
1660 at86rf230_debugfs_root = debugfs_create_dir(debugfs_dir_name, NULL);
1661 if (!at86rf230_debugfs_root)
1662 return -ENOMEM;
1663
1664 stats = debugfs_create_file("trac_stats", 0444,
1665 at86rf230_debugfs_root, lp,
1666 &at86rf230_stats_fops);
1667 if (!stats)
1668 return -ENOMEM;
1669
1670 return 0;
1671}
1672
1673static void at86rf230_debugfs_remove(void)
1674{
1675 debugfs_remove_recursive(at86rf230_debugfs_root);
1676}
1677#else
1678static int at86rf230_debugfs_init(struct at86rf230_local *lp) { return 0; }
1679static void at86rf230_debugfs_remove(void) { }
1680#endif
1681
1682static int at86rf230_probe(struct spi_device *spi)
1683{
1684 struct ieee802154_hw *hw;
1685 struct at86rf230_local *lp;
1686 unsigned int status;
1687 int rc, irq_type, rstn, slp_tr;
1688 u8 xtal_trim = 0;
1689
1690 if (!spi->irq) {
1691 dev_err(&spi->dev, "no IRQ specified\n");
1692 return -EINVAL;
1693 }
1694
1695 rc = at86rf230_get_pdata(spi, &rstn, &slp_tr, &xtal_trim);
1696 if (rc < 0) {
1697 dev_err(&spi->dev, "failed to parse platform_data: %d\n", rc);
1698 return rc;
1699 }
1700
1701 if (gpio_is_valid(rstn)) {
1702 rc = devm_gpio_request_one(&spi->dev, rstn,
1703 GPIOF_OUT_INIT_HIGH, "rstn");
1704 if (rc)
1705 return rc;
1706 }
1707
1708 if (gpio_is_valid(slp_tr)) {
1709 rc = devm_gpio_request_one(&spi->dev, slp_tr,
1710 GPIOF_OUT_INIT_LOW, "slp_tr");
1711 if (rc)
1712 return rc;
1713 }
1714
1715 /* Reset */
1716 if (gpio_is_valid(rstn)) {
1717 udelay(1);
1718 gpio_set_value_cansleep(rstn, 0);
1719 udelay(1);
1720 gpio_set_value_cansleep(rstn, 1);
1721 usleep_range(120, 240);
1722 }
1723
1724 hw = ieee802154_alloc_hw(sizeof(*lp), &at86rf230_ops);
1725 if (!hw)
1726 return -ENOMEM;
1727
1728 lp = hw->priv;
1729 lp->hw = hw;
1730 lp->spi = spi;
1731 lp->slp_tr = slp_tr;
1732 hw->parent = &spi->dev;
1733 ieee802154_random_extended_addr(&hw->phy->perm_extended_addr);
1734
1735 lp->regmap = devm_regmap_init_spi(spi, &at86rf230_regmap_spi_config);
1736 if (IS_ERR(lp->regmap)) {
1737 rc = PTR_ERR(lp->regmap);
1738 dev_err(&spi->dev, "Failed to allocate register map: %d\n",
1739 rc);
1740 goto free_dev;
1741 }
1742
1743 at86rf230_setup_spi_messages(lp, &lp->state);
1744 at86rf230_setup_spi_messages(lp, &lp->tx);
1745
1746 rc = at86rf230_detect_device(lp);
1747 if (rc < 0)
1748 goto free_dev;
1749
1750 init_completion(&lp->state_complete);
1751
1752 spi_set_drvdata(spi, lp);
1753
1754 rc = at86rf230_hw_init(lp, xtal_trim);
1755 if (rc)
1756 goto free_dev;
1757
1758 /* Read irq status register to reset irq line */
1759 rc = at86rf230_read_subreg(lp, RG_IRQ_STATUS, 0xff, 0, &status);
1760 if (rc)
1761 goto free_dev;
1762
1763 irq_type = irq_get_trigger_type(spi->irq);
1764 if (!irq_type)
1765 irq_type = IRQF_TRIGGER_HIGH;
1766
1767 rc = devm_request_irq(&spi->dev, spi->irq, at86rf230_isr,
1768 IRQF_SHARED | irq_type, dev_name(&spi->dev), lp);
1769 if (rc)
1770 goto free_dev;
1771
1772 /* disable_irq by default and wait for starting hardware */
1773 disable_irq(spi->irq);
1774
1775 /* going into sleep by default */
1776 at86rf230_sleep(lp);
1777
1778 rc = at86rf230_debugfs_init(lp);
1779 if (rc)
1780 goto free_dev;
1781
1782 rc = ieee802154_register_hw(lp->hw);
1783 if (rc)
1784 goto free_debugfs;
1785
1786 return rc;
1787
1788free_debugfs:
1789 at86rf230_debugfs_remove();
1790free_dev:
1791 ieee802154_free_hw(lp->hw);
1792
1793 return rc;
1794}
1795
1796static int at86rf230_remove(struct spi_device *spi)
1797{
1798 struct at86rf230_local *lp = spi_get_drvdata(spi);
1799
1800 /* mask all at86rf230 irq's */
1801 at86rf230_write_subreg(lp, SR_IRQ_MASK, 0);
1802 ieee802154_unregister_hw(lp->hw);
1803 ieee802154_free_hw(lp->hw);
1804 at86rf230_debugfs_remove();
1805 dev_dbg(&spi->dev, "unregistered at86rf230\n");
1806
1807 return 0;
1808}
1809
1810static const struct of_device_id at86rf230_of_match[] = {
1811 { .compatible = "atmel,at86rf230", },
1812 { .compatible = "atmel,at86rf231", },
1813 { .compatible = "atmel,at86rf233", },
1814 { .compatible = "atmel,at86rf212", },
1815 { },
1816};
1817MODULE_DEVICE_TABLE(of, at86rf230_of_match);
1818
1819static const struct spi_device_id at86rf230_device_id[] = {
1820 { .name = "at86rf230", },
1821 { .name = "at86rf231", },
1822 { .name = "at86rf233", },
1823 { .name = "at86rf212", },
1824 { },
1825};
1826MODULE_DEVICE_TABLE(spi, at86rf230_device_id);
1827
1828static struct spi_driver at86rf230_driver = {
1829 .id_table = at86rf230_device_id,
1830 .driver = {
1831 .of_match_table = of_match_ptr(at86rf230_of_match),
1832 .name = "at86rf230",
1833 },
1834 .probe = at86rf230_probe,
1835 .remove = at86rf230_remove,
1836};
1837
1838module_spi_driver(at86rf230_driver);
1839
1840MODULE_DESCRIPTION("AT86RF230 Transceiver Driver");
1841MODULE_LICENSE("GPL v2");