Version:  2.0.40 2.2.26 2.4.37 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18 3.19 4.0 4.1 4.2 4.3 4.4 4.5

Linux/drivers/net/ieee802154/at86rf230.c

  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 
 41 struct at86rf230_local;
 42 /* at86rf2xx chip depend data.
 43  * All timings are in us.
 44  */
 45 struct 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 
 71 struct 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 
 87 struct 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 
 96 struct 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 
120 static void
121 at86rf230_async_state_change(struct at86rf230_local *lp,
122                              struct at86rf230_state_change *ctx,
123                              const u8 state, void (*complete)(void *context));
124 
125 static inline void
126 at86rf230_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 
136 static inline void
137 at86rf230_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 
147 static 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 
167 static 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 
187 static inline int
188 at86rf230_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 
201 static inline int
202 at86rf230_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 
222 static inline void
223 at86rf230_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 
230 static bool
231 at86rf230_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 
276 static bool
277 at86rf230_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 
301 static bool
302 at86rf230_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 
320 static bool
321 at86rf230_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 
332 static 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 
345 static void
346 at86rf230_async_error_recover(void *context)
347 {
348         struct at86rf230_state_change *ctx = context;
349         struct at86rf230_local *lp = ctx->lp;
350 
351         lp->is_tx = 0;
352         at86rf230_async_state_change(lp, ctx, STATE_RX_AACK_ON, NULL);
353         ieee802154_wake_queue(lp->hw);
354         if (ctx->free)
355                 kfree(ctx);
356 }
357 
358 static inline void
359 at86rf230_async_error(struct at86rf230_local *lp,
360                       struct at86rf230_state_change *ctx, int rc)
361 {
362         dev_err(&lp->spi->dev, "spi_async error %d\n", rc);
363 
364         at86rf230_async_state_change(lp, ctx, STATE_FORCE_TRX_OFF,
365                                      at86rf230_async_error_recover);
366 }
367 
368 /* Generic function to get some register value in async mode */
369 static void
370 at86rf230_async_read_reg(struct at86rf230_local *lp, u8 reg,
371                          struct at86rf230_state_change *ctx,
372                          void (*complete)(void *context))
373 {
374         int rc;
375 
376         u8 *tx_buf = ctx->buf;
377 
378         tx_buf[0] = (reg & CMD_REG_MASK) | CMD_REG;
379         ctx->msg.complete = complete;
380         rc = spi_async(lp->spi, &ctx->msg);
381         if (rc)
382                 at86rf230_async_error(lp, ctx, rc);
383 }
384 
385 static void
386 at86rf230_async_write_reg(struct at86rf230_local *lp, u8 reg, u8 val,
387                           struct at86rf230_state_change *ctx,
388                           void (*complete)(void *context))
389 {
390         int rc;
391 
392         ctx->buf[0] = (reg & CMD_REG_MASK) | CMD_REG | CMD_WRITE;
393         ctx->buf[1] = val;
394         ctx->msg.complete = complete;
395         rc = spi_async(lp->spi, &ctx->msg);
396         if (rc)
397                 at86rf230_async_error(lp, ctx, rc);
398 }
399 
400 static void
401 at86rf230_async_state_assert(void *context)
402 {
403         struct at86rf230_state_change *ctx = context;
404         struct at86rf230_local *lp = ctx->lp;
405         const u8 *buf = ctx->buf;
406         const u8 trx_state = buf[1] & TRX_STATE_MASK;
407 
408         /* Assert state change */
409         if (trx_state != ctx->to_state) {
410                 /* Special handling if transceiver state is in
411                  * STATE_BUSY_RX_AACK and a SHR was detected.
412                  */
413                 if  (trx_state == STATE_BUSY_RX_AACK) {
414                         /* Undocumented race condition. If we send a state
415                          * change to STATE_RX_AACK_ON the transceiver could
416                          * change his state automatically to STATE_BUSY_RX_AACK
417                          * if a SHR was detected. This is not an error, but we
418                          * can't assert this.
419                          */
420                         if (ctx->to_state == STATE_RX_AACK_ON)
421                                 goto done;
422 
423                         /* If we change to STATE_TX_ON without forcing and
424                          * transceiver state is STATE_BUSY_RX_AACK, we wait
425                          * 'tFrame + tPAck' receiving time. In this time the
426                          * PDU should be received. If the transceiver is still
427                          * in STATE_BUSY_RX_AACK, we run a force state change
428                          * to STATE_TX_ON. This is a timeout handling, if the
429                          * transceiver stucks in STATE_BUSY_RX_AACK.
430                          *
431                          * Additional we do several retries to try to get into
432                          * TX_ON state without forcing. If the retries are
433                          * higher or equal than AT86RF2XX_MAX_TX_RETRIES we
434                          * will do a force change.
435                          */
436                         if (ctx->to_state == STATE_TX_ON ||
437                             ctx->to_state == STATE_TRX_OFF) {
438                                 u8 state = ctx->to_state;
439 
440                                 if (lp->tx_retry >= AT86RF2XX_MAX_TX_RETRIES)
441                                         state = STATE_FORCE_TRX_OFF;
442                                 lp->tx_retry++;
443 
444                                 at86rf230_async_state_change(lp, ctx, state,
445                                                              ctx->complete);
446                                 return;
447                         }
448                 }
449 
450                 dev_warn(&lp->spi->dev, "unexcept state change from 0x%02x to 0x%02x. Actual state: 0x%02x\n",
451                          ctx->from_state, ctx->to_state, trx_state);
452         }
453 
454 done:
455         if (ctx->complete)
456                 ctx->complete(context);
457 }
458 
459 static enum hrtimer_restart at86rf230_async_state_timer(struct hrtimer *timer)
460 {
461         struct at86rf230_state_change *ctx =
462                 container_of(timer, struct at86rf230_state_change, timer);
463         struct at86rf230_local *lp = ctx->lp;
464 
465         at86rf230_async_read_reg(lp, RG_TRX_STATUS, ctx,
466                                  at86rf230_async_state_assert);
467 
468         return HRTIMER_NORESTART;
469 }
470 
471 /* Do state change timing delay. */
472 static void
473 at86rf230_async_state_delay(void *context)
474 {
475         struct at86rf230_state_change *ctx = context;
476         struct at86rf230_local *lp = ctx->lp;
477         struct at86rf2xx_chip_data *c = lp->data;
478         bool force = false;
479         ktime_t tim;
480 
481         /* The force state changes are will show as normal states in the
482          * state status subregister. We change the to_state to the
483          * corresponding one and remember if it was a force change, this
484          * differs if we do a state change from STATE_BUSY_RX_AACK.
485          */
486         switch (ctx->to_state) {
487         case STATE_FORCE_TX_ON:
488                 ctx->to_state = STATE_TX_ON;
489                 force = true;
490                 break;
491         case STATE_FORCE_TRX_OFF:
492                 ctx->to_state = STATE_TRX_OFF;
493                 force = true;
494                 break;
495         default:
496                 break;
497         }
498 
499         switch (ctx->from_state) {
500         case STATE_TRX_OFF:
501                 switch (ctx->to_state) {
502                 case STATE_RX_AACK_ON:
503                         tim = ktime_set(0, c->t_off_to_aack * NSEC_PER_USEC);
504                         /* state change from TRX_OFF to RX_AACK_ON to do a
505                          * calibration, we need to reset the timeout for the
506                          * next one.
507                          */
508                         lp->cal_timeout = jiffies + AT86RF2XX_CAL_LOOP_TIMEOUT;
509                         goto change;
510                 case STATE_TX_ARET_ON:
511                 case STATE_TX_ON:
512                         tim = ktime_set(0, c->t_off_to_tx_on * NSEC_PER_USEC);
513                         /* state change from TRX_OFF to TX_ON or ARET_ON to do
514                          * a calibration, we need to reset the timeout for the
515                          * next one.
516                          */
517                         lp->cal_timeout = jiffies + AT86RF2XX_CAL_LOOP_TIMEOUT;
518                         goto change;
519                 default:
520                         break;
521                 }
522                 break;
523         case STATE_BUSY_RX_AACK:
524                 switch (ctx->to_state) {
525                 case STATE_TRX_OFF:
526                 case STATE_TX_ON:
527                         /* Wait for worst case receiving time if we
528                          * didn't make a force change from BUSY_RX_AACK
529                          * to TX_ON or TRX_OFF.
530                          */
531                         if (!force) {
532                                 tim = ktime_set(0, (c->t_frame + c->t_p_ack) *
533                                                    NSEC_PER_USEC);
534                                 goto change;
535                         }
536                         break;
537                 default:
538                         break;
539                 }
540                 break;
541         /* Default value, means RESET state */
542         case STATE_P_ON:
543                 switch (ctx->to_state) {
544                 case STATE_TRX_OFF:
545                         tim = ktime_set(0, c->t_reset_to_off * NSEC_PER_USEC);
546                         goto change;
547                 default:
548                         break;
549                 }
550                 break;
551         default:
552                 break;
553         }
554 
555         /* Default delay is 1us in the most cases */
556         udelay(1);
557         at86rf230_async_state_timer(&ctx->timer);
558         return;
559 
560 change:
561         hrtimer_start(&ctx->timer, tim, HRTIMER_MODE_REL);
562 }
563 
564 static void
565 at86rf230_async_state_change_start(void *context)
566 {
567         struct at86rf230_state_change *ctx = context;
568         struct at86rf230_local *lp = ctx->lp;
569         u8 *buf = ctx->buf;
570         const u8 trx_state = buf[1] & TRX_STATE_MASK;
571 
572         /* Check for "possible" STATE_TRANSITION_IN_PROGRESS */
573         if (trx_state == STATE_TRANSITION_IN_PROGRESS) {
574                 udelay(1);
575                 at86rf230_async_read_reg(lp, RG_TRX_STATUS, ctx,
576                                          at86rf230_async_state_change_start);
577                 return;
578         }
579 
580         /* Check if we already are in the state which we change in */
581         if (trx_state == ctx->to_state) {
582                 if (ctx->complete)
583                         ctx->complete(context);
584                 return;
585         }
586 
587         /* Set current state to the context of state change */
588         ctx->from_state = trx_state;
589 
590         /* Going into the next step for a state change which do a timing
591          * relevant delay.
592          */
593         at86rf230_async_write_reg(lp, RG_TRX_STATE, ctx->to_state, ctx,
594                                   at86rf230_async_state_delay);
595 }
596 
597 static void
598 at86rf230_async_state_change(struct at86rf230_local *lp,
599                              struct at86rf230_state_change *ctx,
600                              const u8 state, void (*complete)(void *context))
601 {
602         /* Initialization for the state change context */
603         ctx->to_state = state;
604         ctx->complete = complete;
605         at86rf230_async_read_reg(lp, RG_TRX_STATUS, ctx,
606                                  at86rf230_async_state_change_start);
607 }
608 
609 static void
610 at86rf230_sync_state_change_complete(void *context)
611 {
612         struct at86rf230_state_change *ctx = context;
613         struct at86rf230_local *lp = ctx->lp;
614 
615         complete(&lp->state_complete);
616 }
617 
618 /* This function do a sync framework above the async state change.
619  * Some callbacks of the IEEE 802.15.4 driver interface need to be
620  * handled synchronously.
621  */
622 static int
623 at86rf230_sync_state_change(struct at86rf230_local *lp, unsigned int state)
624 {
625         unsigned long rc;
626 
627         at86rf230_async_state_change(lp, &lp->state, state,
628                                      at86rf230_sync_state_change_complete);
629 
630         rc = wait_for_completion_timeout(&lp->state_complete,
631                                          msecs_to_jiffies(100));
632         if (!rc) {
633                 at86rf230_async_error(lp, &lp->state, -ETIMEDOUT);
634                 return -ETIMEDOUT;
635         }
636 
637         return 0;
638 }
639 
640 static void
641 at86rf230_tx_complete(void *context)
642 {
643         struct at86rf230_state_change *ctx = context;
644         struct at86rf230_local *lp = ctx->lp;
645 
646         ieee802154_xmit_complete(lp->hw, lp->tx_skb, false);
647         kfree(ctx);
648 }
649 
650 static void
651 at86rf230_tx_on(void *context)
652 {
653         struct at86rf230_state_change *ctx = context;
654         struct at86rf230_local *lp = ctx->lp;
655 
656         at86rf230_async_state_change(lp, ctx, STATE_RX_AACK_ON,
657                                      at86rf230_tx_complete);
658 }
659 
660 static void
661 at86rf230_tx_trac_check(void *context)
662 {
663         struct at86rf230_state_change *ctx = context;
664         struct at86rf230_local *lp = ctx->lp;
665 
666         if (IS_ENABLED(CONFIG_IEEE802154_AT86RF230_DEBUGFS)) {
667                 u8 trac = TRAC_MASK(ctx->buf[1]);
668 
669                 switch (trac) {
670                 case TRAC_SUCCESS:
671                         lp->trac.success++;
672                         break;
673                 case TRAC_SUCCESS_DATA_PENDING:
674                         lp->trac.success_data_pending++;
675                         break;
676                 case TRAC_CHANNEL_ACCESS_FAILURE:
677                         lp->trac.channel_access_failure++;
678                         break;
679                 case TRAC_NO_ACK:
680                         lp->trac.no_ack++;
681                         break;
682                 case TRAC_INVALID:
683                         lp->trac.invalid++;
684                         break;
685                 default:
686                         WARN_ONCE(1, "received tx trac status %d\n", trac);
687                         break;
688                 }
689         }
690 
691         at86rf230_async_state_change(lp, ctx, STATE_TX_ON, at86rf230_tx_on);
692 }
693 
694 static void
695 at86rf230_rx_read_frame_complete(void *context)
696 {
697         struct at86rf230_state_change *ctx = context;
698         struct at86rf230_local *lp = ctx->lp;
699         const u8 *buf = ctx->buf;
700         struct sk_buff *skb;
701         u8 len, lqi;
702 
703         len = buf[1];
704         if (!ieee802154_is_valid_psdu_len(len)) {
705                 dev_vdbg(&lp->spi->dev, "corrupted frame received\n");
706                 len = IEEE802154_MTU;
707         }
708         lqi = buf[2 + len];
709 
710         skb = dev_alloc_skb(IEEE802154_MTU);
711         if (!skb) {
712                 dev_vdbg(&lp->spi->dev, "failed to allocate sk_buff\n");
713                 kfree(ctx);
714                 return;
715         }
716 
717         memcpy(skb_put(skb, len), buf + 2, len);
718         ieee802154_rx_irqsafe(lp->hw, skb, lqi);
719         kfree(ctx);
720 }
721 
722 static void
723 at86rf230_rx_trac_check(void *context)
724 {
725         struct at86rf230_state_change *ctx = context;
726         struct at86rf230_local *lp = ctx->lp;
727         u8 *buf = ctx->buf;
728         int rc;
729 
730         if (IS_ENABLED(CONFIG_IEEE802154_AT86RF230_DEBUGFS)) {
731                 u8 trac = TRAC_MASK(buf[1]);
732 
733                 switch (trac) {
734                 case TRAC_SUCCESS:
735                         lp->trac.success++;
736                         break;
737                 case TRAC_SUCCESS_WAIT_FOR_ACK:
738                         lp->trac.success_wait_for_ack++;
739                         break;
740                 case TRAC_INVALID:
741                         lp->trac.invalid++;
742                         break;
743                 default:
744                         WARN_ONCE(1, "received rx trac status %d\n", trac);
745                         break;
746                 }
747         }
748 
749         buf[0] = CMD_FB;
750         ctx->trx.len = AT86RF2XX_MAX_BUF;
751         ctx->msg.complete = at86rf230_rx_read_frame_complete;
752         rc = spi_async(lp->spi, &ctx->msg);
753         if (rc) {
754                 ctx->trx.len = 2;
755                 at86rf230_async_error(lp, ctx, rc);
756         }
757 }
758 
759 static void
760 at86rf230_irq_trx_end(void *context)
761 {
762         struct at86rf230_state_change *ctx = context;
763         struct at86rf230_local *lp = ctx->lp;
764 
765         if (lp->is_tx) {
766                 lp->is_tx = 0;
767                 at86rf230_async_read_reg(lp, RG_TRX_STATE, ctx,
768                                          at86rf230_tx_trac_check);
769         } else {
770                 at86rf230_async_read_reg(lp, RG_TRX_STATE, ctx,
771                                          at86rf230_rx_trac_check);
772         }
773 }
774 
775 static void
776 at86rf230_irq_status(void *context)
777 {
778         struct at86rf230_state_change *ctx = context;
779         struct at86rf230_local *lp = ctx->lp;
780         const u8 *buf = ctx->buf;
781         u8 irq = buf[1];
782 
783         enable_irq(lp->spi->irq);
784 
785         if (irq & IRQ_TRX_END) {
786                 at86rf230_irq_trx_end(ctx);
787         } else {
788                 dev_err(&lp->spi->dev, "not supported irq %02x received\n",
789                         irq);
790                 kfree(ctx);
791         }
792 }
793 
794 static void
795 at86rf230_setup_spi_messages(struct at86rf230_local *lp,
796                              struct at86rf230_state_change *state)
797 {
798         state->lp = lp;
799         state->irq = lp->spi->irq;
800         spi_message_init(&state->msg);
801         state->msg.context = state;
802         state->trx.len = 2;
803         state->trx.tx_buf = state->buf;
804         state->trx.rx_buf = state->buf;
805         spi_message_add_tail(&state->trx, &state->msg);
806         hrtimer_init(&state->timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
807         state->timer.function = at86rf230_async_state_timer;
808 }
809 
810 static irqreturn_t at86rf230_isr(int irq, void *data)
811 {
812         struct at86rf230_local *lp = data;
813         struct at86rf230_state_change *ctx;
814         int rc;
815 
816         disable_irq_nosync(irq);
817 
818         ctx = kzalloc(sizeof(*ctx), GFP_ATOMIC);
819         if (!ctx) {
820                 enable_irq(irq);
821                 return IRQ_NONE;
822         }
823 
824         at86rf230_setup_spi_messages(lp, ctx);
825         /* tell on error handling to free ctx */
826         ctx->free = true;
827 
828         ctx->buf[0] = (RG_IRQ_STATUS & CMD_REG_MASK) | CMD_REG;
829         ctx->msg.complete = at86rf230_irq_status;
830         rc = spi_async(lp->spi, &ctx->msg);
831         if (rc) {
832                 at86rf230_async_error(lp, ctx, rc);
833                 enable_irq(irq);
834                 return IRQ_NONE;
835         }
836 
837         return IRQ_HANDLED;
838 }
839 
840 static void
841 at86rf230_write_frame_complete(void *context)
842 {
843         struct at86rf230_state_change *ctx = context;
844         struct at86rf230_local *lp = ctx->lp;
845 
846         ctx->trx.len = 2;
847 
848         if (gpio_is_valid(lp->slp_tr))
849                 at86rf230_slp_tr_rising_edge(lp);
850         else
851                 at86rf230_async_write_reg(lp, RG_TRX_STATE, STATE_BUSY_TX, ctx,
852                                           NULL);
853 }
854 
855 static void
856 at86rf230_write_frame(void *context)
857 {
858         struct at86rf230_state_change *ctx = context;
859         struct at86rf230_local *lp = ctx->lp;
860         struct sk_buff *skb = lp->tx_skb;
861         u8 *buf = ctx->buf;
862         int rc;
863 
864         lp->is_tx = 1;
865 
866         buf[0] = CMD_FB | CMD_WRITE;
867         buf[1] = skb->len + 2;
868         memcpy(buf + 2, skb->data, skb->len);
869         ctx->trx.len = skb->len + 2;
870         ctx->msg.complete = at86rf230_write_frame_complete;
871         rc = spi_async(lp->spi, &ctx->msg);
872         if (rc) {
873                 ctx->trx.len = 2;
874                 at86rf230_async_error(lp, ctx, rc);
875         }
876 }
877 
878 static void
879 at86rf230_xmit_tx_on(void *context)
880 {
881         struct at86rf230_state_change *ctx = context;
882         struct at86rf230_local *lp = ctx->lp;
883 
884         at86rf230_async_state_change(lp, ctx, STATE_TX_ARET_ON,
885                                      at86rf230_write_frame);
886 }
887 
888 static void
889 at86rf230_xmit_start(void *context)
890 {
891         struct at86rf230_state_change *ctx = context;
892         struct at86rf230_local *lp = ctx->lp;
893 
894         /* check if we change from off state */
895         if (lp->is_tx_from_off) {
896                 lp->is_tx_from_off = false;
897                 at86rf230_async_state_change(lp, ctx, STATE_TX_ARET_ON,
898                                              at86rf230_write_frame);
899         } else {
900                 at86rf230_async_state_change(lp, ctx, STATE_TX_ON,
901                                              at86rf230_xmit_tx_on);
902         }
903 }
904 
905 static int
906 at86rf230_xmit(struct ieee802154_hw *hw, struct sk_buff *skb)
907 {
908         struct at86rf230_local *lp = hw->priv;
909         struct at86rf230_state_change *ctx = &lp->tx;
910 
911         lp->tx_skb = skb;
912         lp->tx_retry = 0;
913 
914         /* After 5 minutes in PLL and the same frequency we run again the
915          * calibration loops which is recommended by at86rf2xx datasheets.
916          *
917          * The calibration is initiate by a state change from TRX_OFF
918          * to TX_ON, the lp->cal_timeout should be reinit by state_delay
919          * function then to start in the next 5 minutes.
920          */
921         if (time_is_before_jiffies(lp->cal_timeout)) {
922                 lp->is_tx_from_off = true;
923                 at86rf230_async_state_change(lp, ctx, STATE_TRX_OFF,
924                                              at86rf230_xmit_start);
925         } else {
926                 at86rf230_xmit_start(ctx);
927         }
928 
929         return 0;
930 }
931 
932 static int
933 at86rf230_ed(struct ieee802154_hw *hw, u8 *level)
934 {
935         BUG_ON(!level);
936         *level = 0xbe;
937         return 0;
938 }
939 
940 static int
941 at86rf230_start(struct ieee802154_hw *hw)
942 {
943         struct at86rf230_local *lp = hw->priv;
944 
945         /* reset trac stats on start */
946         if (IS_ENABLED(CONFIG_IEEE802154_AT86RF230_DEBUGFS))
947                 memset(&lp->trac, 0, sizeof(struct at86rf230_trac));
948 
949         at86rf230_awake(lp);
950         enable_irq(lp->spi->irq);
951 
952         return at86rf230_sync_state_change(lp, STATE_RX_AACK_ON);
953 }
954 
955 static void
956 at86rf230_stop(struct ieee802154_hw *hw)
957 {
958         struct at86rf230_local *lp = hw->priv;
959         u8 csma_seed[2];
960 
961         at86rf230_sync_state_change(lp, STATE_FORCE_TRX_OFF);
962 
963         disable_irq(lp->spi->irq);
964 
965         /* It's recommended to set random new csma_seeds before sleep state.
966          * Makes only sense in the stop callback, not doing this inside of
967          * at86rf230_sleep, this is also used when we don't transmit afterwards
968          * when calling start callback again.
969          */
970         get_random_bytes(csma_seed, ARRAY_SIZE(csma_seed));
971         at86rf230_write_subreg(lp, SR_CSMA_SEED_0, csma_seed[0]);
972         at86rf230_write_subreg(lp, SR_CSMA_SEED_1, csma_seed[1]);
973 
974         at86rf230_sleep(lp);
975 }
976 
977 static int
978 at86rf23x_set_channel(struct at86rf230_local *lp, u8 page, u8 channel)
979 {
980         return at86rf230_write_subreg(lp, SR_CHANNEL, channel);
981 }
982 
983 #define AT86RF2XX_MAX_ED_LEVELS 0xF
984 static const s32 at86rf23x_ed_levels[AT86RF2XX_MAX_ED_LEVELS + 1] = {
985         -9100, -8900, -8700, -8500, -8300, -8100, -7900, -7700, -7500, -7300,
986         -7100, -6900, -6700, -6500, -6300, -6100,
987 };
988 
989 static const s32 at86rf212_ed_levels_100[AT86RF2XX_MAX_ED_LEVELS + 1] = {
990         -10000, -9800, -9600, -9400, -9200, -9000, -8800, -8600, -8400, -8200,
991         -8000, -7800, -7600, -7400, -7200, -7000,
992 };
993 
994 static const s32 at86rf212_ed_levels_98[AT86RF2XX_MAX_ED_LEVELS + 1] = {
995         -9800, -9600, -9400, -9200, -9000, -8800, -8600, -8400, -8200, -8000,
996         -7800, -7600, -7400, -7200, -7000, -6800,
997 };
998 
999 static inline int
1000 at86rf212_update_cca_ed_level(struct at86rf230_local *lp, int rssi_base_val)
1001 {
1002         unsigned int cca_ed_thres;
1003         int rc;
1004 
1005         rc = at86rf230_read_subreg(lp, SR_CCA_ED_THRES, &cca_ed_thres);
1006         if (rc < 0)
1007                 return rc;
1008 
1009         switch (rssi_base_val) {
1010         case -98:
1011                 lp->hw->phy->supported.cca_ed_levels = at86rf212_ed_levels_98;
1012                 lp->hw->phy->supported.cca_ed_levels_size = ARRAY_SIZE(at86rf212_ed_levels_98);
1013                 lp->hw->phy->cca_ed_level = at86rf212_ed_levels_98[cca_ed_thres];
1014                 break;
1015         case -100:
1016                 lp->hw->phy->supported.cca_ed_levels = at86rf212_ed_levels_100;
1017                 lp->hw->phy->supported.cca_ed_levels_size = ARRAY_SIZE(at86rf212_ed_levels_100);
1018                 lp->hw->phy->cca_ed_level = at86rf212_ed_levels_100[cca_ed_thres];
1019                 break;
1020         default:
1021                 WARN_ON(1);
1022         }
1023 
1024         return 0;
1025 }
1026 
1027 static int
1028 at86rf212_set_channel(struct at86rf230_local *lp, u8 page, u8 channel)
1029 {
1030         int rc;
1031 
1032         if (channel == 0)
1033                 rc = at86rf230_write_subreg(lp, SR_SUB_MODE, 0);
1034         else
1035                 rc = at86rf230_write_subreg(lp, SR_SUB_MODE, 1);
1036         if (rc < 0)
1037                 return rc;
1038 
1039         if (page == 0) {
1040                 rc = at86rf230_write_subreg(lp, SR_BPSK_QPSK, 0);
1041                 lp->data->rssi_base_val = -100;
1042         } else {
1043                 rc = at86rf230_write_subreg(lp, SR_BPSK_QPSK, 1);
1044                 lp->data->rssi_base_val = -98;
1045         }
1046         if (rc < 0)
1047                 return rc;
1048 
1049         rc = at86rf212_update_cca_ed_level(lp, lp->data->rssi_base_val);
1050         if (rc < 0)
1051                 return rc;
1052 
1053         /* This sets the symbol_duration according frequency on the 212.
1054          * TODO move this handling while set channel and page in cfg802154.
1055          * We can do that, this timings are according 802.15.4 standard.
1056          * If we do that in cfg802154, this is a more generic calculation.
1057          *
1058          * This should also protected from ifs_timer. Means cancel timer and
1059          * init with a new value. For now, this is okay.
1060          */
1061         if (channel == 0) {
1062                 if (page == 0) {
1063                         /* SUB:0 and BPSK:0 -> BPSK-20 */
1064                         lp->hw->phy->symbol_duration = 50;
1065                 } else {
1066                         /* SUB:1 and BPSK:0 -> BPSK-40 */
1067                         lp->hw->phy->symbol_duration = 25;
1068                 }
1069         } else {
1070                 if (page == 0)
1071                         /* SUB:0 and BPSK:1 -> OQPSK-100/200/400 */
1072                         lp->hw->phy->symbol_duration = 40;
1073                 else
1074                         /* SUB:1 and BPSK:1 -> OQPSK-250/500/1000 */
1075                         lp->hw->phy->symbol_duration = 16;
1076         }
1077 
1078         lp->hw->phy->lifs_period = IEEE802154_LIFS_PERIOD *
1079                                    lp->hw->phy->symbol_duration;
1080         lp->hw->phy->sifs_period = IEEE802154_SIFS_PERIOD *
1081                                    lp->hw->phy->symbol_duration;
1082 
1083         return at86rf230_write_subreg(lp, SR_CHANNEL, channel);
1084 }
1085 
1086 static int
1087 at86rf230_channel(struct ieee802154_hw *hw, u8 page, u8 channel)
1088 {
1089         struct at86rf230_local *lp = hw->priv;
1090         int rc;
1091 
1092         rc = lp->data->set_channel(lp, page, channel);
1093         /* Wait for PLL */
1094         usleep_range(lp->data->t_channel_switch,
1095                      lp->data->t_channel_switch + 10);
1096 
1097         lp->cal_timeout = jiffies + AT86RF2XX_CAL_LOOP_TIMEOUT;
1098         return rc;
1099 }
1100 
1101 static int
1102 at86rf230_set_hw_addr_filt(struct ieee802154_hw *hw,
1103                            struct ieee802154_hw_addr_filt *filt,
1104                            unsigned long changed)
1105 {
1106         struct at86rf230_local *lp = hw->priv;
1107 
1108         if (changed & IEEE802154_AFILT_SADDR_CHANGED) {
1109                 u16 addr = le16_to_cpu(filt->short_addr);
1110 
1111                 dev_vdbg(&lp->spi->dev,
1112                          "at86rf230_set_hw_addr_filt called for saddr\n");
1113                 __at86rf230_write(lp, RG_SHORT_ADDR_0, addr);
1114                 __at86rf230_write(lp, RG_SHORT_ADDR_1, addr >> 8);
1115         }
1116 
1117         if (changed & IEEE802154_AFILT_PANID_CHANGED) {
1118                 u16 pan = le16_to_cpu(filt->pan_id);
1119 
1120                 dev_vdbg(&lp->spi->dev,
1121                          "at86rf230_set_hw_addr_filt called for pan id\n");
1122                 __at86rf230_write(lp, RG_PAN_ID_0, pan);
1123                 __at86rf230_write(lp, RG_PAN_ID_1, pan >> 8);
1124         }
1125 
1126         if (changed & IEEE802154_AFILT_IEEEADDR_CHANGED) {
1127                 u8 i, addr[8];
1128 
1129                 memcpy(addr, &filt->ieee_addr, 8);
1130                 dev_vdbg(&lp->spi->dev,
1131                          "at86rf230_set_hw_addr_filt called for IEEE addr\n");
1132                 for (i = 0; i < 8; i++)
1133                         __at86rf230_write(lp, RG_IEEE_ADDR_0 + i, addr[i]);
1134         }
1135 
1136         if (changed & IEEE802154_AFILT_PANC_CHANGED) {
1137                 dev_vdbg(&lp->spi->dev,
1138                          "at86rf230_set_hw_addr_filt called for panc change\n");
1139                 if (filt->pan_coord)
1140                         at86rf230_write_subreg(lp, SR_AACK_I_AM_COORD, 1);
1141                 else
1142                         at86rf230_write_subreg(lp, SR_AACK_I_AM_COORD, 0);
1143         }
1144 
1145         return 0;
1146 }
1147 
1148 #define AT86RF23X_MAX_TX_POWERS 0xF
1149 static const s32 at86rf233_powers[AT86RF23X_MAX_TX_POWERS + 1] = {
1150         400, 370, 340, 300, 250, 200, 100, 0, -100, -200, -300, -400, -600,
1151         -800, -1200, -1700,
1152 };
1153 
1154 static const s32 at86rf231_powers[AT86RF23X_MAX_TX_POWERS + 1] = {
1155         300, 280, 230, 180, 130, 70, 0, -100, -200, -300, -400, -500, -700,
1156         -900, -1200, -1700,
1157 };
1158 
1159 #define AT86RF212_MAX_TX_POWERS 0x1F
1160 static const s32 at86rf212_powers[AT86RF212_MAX_TX_POWERS + 1] = {
1161         500, 400, 300, 200, 100, 0, -100, -200, -300, -400, -500, -600, -700,
1162         -800, -900, -1000, -1100, -1200, -1300, -1400, -1500, -1600, -1700,
1163         -1800, -1900, -2000, -2100, -2200, -2300, -2400, -2500, -2600,
1164 };
1165 
1166 static int
1167 at86rf23x_set_txpower(struct at86rf230_local *lp, s32 mbm)
1168 {
1169         u32 i;
1170 
1171         for (i = 0; i < lp->hw->phy->supported.tx_powers_size; i++) {
1172                 if (lp->hw->phy->supported.tx_powers[i] == mbm)
1173                         return at86rf230_write_subreg(lp, SR_TX_PWR_23X, i);
1174         }
1175 
1176         return -EINVAL;
1177 }
1178 
1179 static int
1180 at86rf212_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_212, i);
1187         }
1188 
1189         return -EINVAL;
1190 }
1191 
1192 static int
1193 at86rf230_set_txpower(struct ieee802154_hw *hw, s32 mbm)
1194 {
1195         struct at86rf230_local *lp = hw->priv;
1196 
1197         return lp->data->set_txpower(lp, mbm);
1198 }
1199 
1200 static int
1201 at86rf230_set_lbt(struct ieee802154_hw *hw, bool on)
1202 {
1203         struct at86rf230_local *lp = hw->priv;
1204 
1205         return at86rf230_write_subreg(lp, SR_CSMA_LBT_MODE, on);
1206 }
1207 
1208 static int
1209 at86rf230_set_cca_mode(struct ieee802154_hw *hw,
1210                        const struct wpan_phy_cca *cca)
1211 {
1212         struct at86rf230_local *lp = hw->priv;
1213         u8 val;
1214 
1215         /* mapping 802.15.4 to driver spec */
1216         switch (cca->mode) {
1217         case NL802154_CCA_ENERGY:
1218                 val = 1;
1219                 break;
1220         case NL802154_CCA_CARRIER:
1221                 val = 2;
1222                 break;
1223         case NL802154_CCA_ENERGY_CARRIER:
1224                 switch (cca->opt) {
1225                 case NL802154_CCA_OPT_ENERGY_CARRIER_AND:
1226                         val = 3;
1227                         break;
1228                 case NL802154_CCA_OPT_ENERGY_CARRIER_OR:
1229                         val = 0;
1230                         break;
1231                 default:
1232                         return -EINVAL;
1233                 }
1234                 break;
1235         default:
1236                 return -EINVAL;
1237         }
1238 
1239         return at86rf230_write_subreg(lp, SR_CCA_MODE, val);
1240 }
1241 
1242 
1243 static int
1244 at86rf230_set_cca_ed_level(struct ieee802154_hw *hw, s32 mbm)
1245 {
1246         struct at86rf230_local *lp = hw->priv;
1247         u32 i;
1248 
1249         for (i = 0; i < hw->phy->supported.cca_ed_levels_size; i++) {
1250                 if (hw->phy->supported.cca_ed_levels[i] == mbm)
1251                         return at86rf230_write_subreg(lp, SR_CCA_ED_THRES, i);
1252         }
1253 
1254         return -EINVAL;
1255 }
1256 
1257 static int
1258 at86rf230_set_csma_params(struct ieee802154_hw *hw, u8 min_be, u8 max_be,
1259                           u8 retries)
1260 {
1261         struct at86rf230_local *lp = hw->priv;
1262         int rc;
1263 
1264         rc = at86rf230_write_subreg(lp, SR_MIN_BE, min_be);
1265         if (rc)
1266                 return rc;
1267 
1268         rc = at86rf230_write_subreg(lp, SR_MAX_BE, max_be);
1269         if (rc)
1270                 return rc;
1271 
1272         return at86rf230_write_subreg(lp, SR_MAX_CSMA_RETRIES, retries);
1273 }
1274 
1275 static int
1276 at86rf230_set_frame_retries(struct ieee802154_hw *hw, s8 retries)
1277 {
1278         struct at86rf230_local *lp = hw->priv;
1279 
1280         return at86rf230_write_subreg(lp, SR_MAX_FRAME_RETRIES, retries);
1281 }
1282 
1283 static int
1284 at86rf230_set_promiscuous_mode(struct ieee802154_hw *hw, const bool on)
1285 {
1286         struct at86rf230_local *lp = hw->priv;
1287         int rc;
1288 
1289         if (on) {
1290                 rc = at86rf230_write_subreg(lp, SR_AACK_DIS_ACK, 1);
1291                 if (rc < 0)
1292                         return rc;
1293 
1294                 rc = at86rf230_write_subreg(lp, SR_AACK_PROM_MODE, 1);
1295                 if (rc < 0)
1296                         return rc;
1297         } else {
1298                 rc = at86rf230_write_subreg(lp, SR_AACK_PROM_MODE, 0);
1299                 if (rc < 0)
1300                         return rc;
1301 
1302                 rc = at86rf230_write_subreg(lp, SR_AACK_DIS_ACK, 0);
1303                 if (rc < 0)
1304                         return rc;
1305         }
1306 
1307         return 0;
1308 }
1309 
1310 static const struct ieee802154_ops at86rf230_ops = {
1311         .owner = THIS_MODULE,
1312         .xmit_async = at86rf230_xmit,
1313         .ed = at86rf230_ed,
1314         .set_channel = at86rf230_channel,
1315         .start = at86rf230_start,
1316         .stop = at86rf230_stop,
1317         .set_hw_addr_filt = at86rf230_set_hw_addr_filt,
1318         .set_txpower = at86rf230_set_txpower,
1319         .set_lbt = at86rf230_set_lbt,
1320         .set_cca_mode = at86rf230_set_cca_mode,
1321         .set_cca_ed_level = at86rf230_set_cca_ed_level,
1322         .set_csma_params = at86rf230_set_csma_params,
1323         .set_frame_retries = at86rf230_set_frame_retries,
1324         .set_promiscuous_mode = at86rf230_set_promiscuous_mode,
1325 };
1326 
1327 static struct at86rf2xx_chip_data at86rf233_data = {
1328         .t_sleep_cycle = 330,
1329         .t_channel_switch = 11,
1330         .t_reset_to_off = 26,
1331         .t_off_to_aack = 80,
1332         .t_off_to_tx_on = 80,
1333         .t_off_to_sleep = 35,
1334         .t_sleep_to_off = 210,
1335         .t_frame = 4096,
1336         .t_p_ack = 545,
1337         .rssi_base_val = -91,
1338         .set_channel = at86rf23x_set_channel,
1339         .set_txpower = at86rf23x_set_txpower,
1340 };
1341 
1342 static struct at86rf2xx_chip_data at86rf231_data = {
1343         .t_sleep_cycle = 330,
1344         .t_channel_switch = 24,
1345         .t_reset_to_off = 37,
1346         .t_off_to_aack = 110,
1347         .t_off_to_tx_on = 110,
1348         .t_off_to_sleep = 35,
1349         .t_sleep_to_off = 380,
1350         .t_frame = 4096,
1351         .t_p_ack = 545,
1352         .rssi_base_val = -91,
1353         .set_channel = at86rf23x_set_channel,
1354         .set_txpower = at86rf23x_set_txpower,
1355 };
1356 
1357 static struct at86rf2xx_chip_data at86rf212_data = {
1358         .t_sleep_cycle = 330,
1359         .t_channel_switch = 11,
1360         .t_reset_to_off = 26,
1361         .t_off_to_aack = 200,
1362         .t_off_to_tx_on = 200,
1363         .t_off_to_sleep = 35,
1364         .t_sleep_to_off = 380,
1365         .t_frame = 4096,
1366         .t_p_ack = 545,
1367         .rssi_base_val = -100,
1368         .set_channel = at86rf212_set_channel,
1369         .set_txpower = at86rf212_set_txpower,
1370 };
1371 
1372 static int at86rf230_hw_init(struct at86rf230_local *lp, u8 xtal_trim)
1373 {
1374         int rc, irq_type, irq_pol = IRQ_ACTIVE_HIGH;
1375         unsigned int dvdd;
1376         u8 csma_seed[2];
1377 
1378         rc = at86rf230_sync_state_change(lp, STATE_FORCE_TRX_OFF);
1379         if (rc)
1380                 return rc;
1381 
1382         irq_type = irq_get_trigger_type(lp->spi->irq);
1383         if (irq_type == IRQ_TYPE_EDGE_FALLING ||
1384             irq_type == IRQ_TYPE_LEVEL_LOW)
1385                 irq_pol = IRQ_ACTIVE_LOW;
1386 
1387         rc = at86rf230_write_subreg(lp, SR_IRQ_POLARITY, irq_pol);
1388         if (rc)
1389                 return rc;
1390 
1391         rc = at86rf230_write_subreg(lp, SR_RX_SAFE_MODE, 1);
1392         if (rc)
1393                 return rc;
1394 
1395         rc = at86rf230_write_subreg(lp, SR_IRQ_MASK, IRQ_TRX_END);
1396         if (rc)
1397                 return rc;
1398 
1399         /* reset values differs in at86rf231 and at86rf233 */
1400         rc = at86rf230_write_subreg(lp, SR_IRQ_MASK_MODE, 0);
1401         if (rc)
1402                 return rc;
1403 
1404         get_random_bytes(csma_seed, ARRAY_SIZE(csma_seed));
1405         rc = at86rf230_write_subreg(lp, SR_CSMA_SEED_0, csma_seed[0]);
1406         if (rc)
1407                 return rc;
1408         rc = at86rf230_write_subreg(lp, SR_CSMA_SEED_1, csma_seed[1]);
1409         if (rc)
1410                 return rc;
1411 
1412         /* CLKM changes are applied immediately */
1413         rc = at86rf230_write_subreg(lp, SR_CLKM_SHA_SEL, 0x00);
1414         if (rc)
1415                 return rc;
1416 
1417         /* Turn CLKM Off */
1418         rc = at86rf230_write_subreg(lp, SR_CLKM_CTRL, 0x00);
1419         if (rc)
1420                 return rc;
1421         /* Wait the next SLEEP cycle */
1422         usleep_range(lp->data->t_sleep_cycle,
1423                      lp->data->t_sleep_cycle + 100);
1424 
1425         /* xtal_trim value is calculated by:
1426          * CL = 0.5 * (CX + CTRIM + CPAR)
1427          *
1428          * whereas:
1429          * CL = capacitor of used crystal
1430          * CX = connected capacitors at xtal pins
1431          * CPAR = in all at86rf2xx datasheets this is a constant value 3 pF,
1432          *        but this is different on each board setup. You need to fine
1433          *        tuning this value via CTRIM.
1434          * CTRIM = variable capacitor setting. Resolution is 0.3 pF range is
1435          *         0 pF upto 4.5 pF.
1436          *
1437          * Examples:
1438          * atben transceiver:
1439          *
1440          * CL = 8 pF
1441          * CX = 12 pF
1442          * CPAR = 3 pF (We assume the magic constant from datasheet)
1443          * CTRIM = 0.9 pF
1444          *
1445          * (12+0.9+3)/2 = 7.95 which is nearly at 8 pF
1446          *
1447          * xtal_trim = 0x3
1448          *
1449          * openlabs transceiver:
1450          *
1451          * CL = 16 pF
1452          * CX = 22 pF
1453          * CPAR = 3 pF (We assume the magic constant from datasheet)
1454          * CTRIM = 4.5 pF
1455          *
1456          * (22+4.5+3)/2 = 14.75 which is the nearest value to 16 pF
1457          *
1458          * xtal_trim = 0xf
1459          */
1460         rc = at86rf230_write_subreg(lp, SR_XTAL_TRIM, xtal_trim);
1461         if (rc)
1462                 return rc;
1463 
1464         rc = at86rf230_read_subreg(lp, SR_DVDD_OK, &dvdd);
1465         if (rc)
1466                 return rc;
1467         if (!dvdd) {
1468                 dev_err(&lp->spi->dev, "DVDD error\n");
1469                 return -EINVAL;
1470         }
1471 
1472         /* Force setting slotted operation bit to 0. Sometimes the atben
1473          * sets this bit and I don't know why. We set this always force
1474          * to zero while probing.
1475          */
1476         return at86rf230_write_subreg(lp, SR_SLOTTED_OPERATION, 0);
1477 }
1478 
1479 static int
1480 at86rf230_get_pdata(struct spi_device *spi, int *rstn, int *slp_tr,
1481                     u8 *xtal_trim)
1482 {
1483         struct at86rf230_platform_data *pdata = spi->dev.platform_data;
1484         int ret;
1485 
1486         if (!IS_ENABLED(CONFIG_OF) || !spi->dev.of_node) {
1487                 if (!pdata)
1488                         return -ENOENT;
1489 
1490                 *rstn = pdata->rstn;
1491                 *slp_tr = pdata->slp_tr;
1492                 *xtal_trim = pdata->xtal_trim;
1493                 return 0;
1494         }
1495 
1496         *rstn = of_get_named_gpio(spi->dev.of_node, "reset-gpio", 0);
1497         *slp_tr = of_get_named_gpio(spi->dev.of_node, "sleep-gpio", 0);
1498         ret = of_property_read_u8(spi->dev.of_node, "xtal-trim", xtal_trim);
1499         if (ret < 0 && ret != -EINVAL)
1500                 return ret;
1501 
1502         return 0;
1503 }
1504 
1505 static int
1506 at86rf230_detect_device(struct at86rf230_local *lp)
1507 {
1508         unsigned int part, version, val;
1509         u16 man_id = 0;
1510         const char *chip;
1511         int rc;
1512 
1513         rc = __at86rf230_read(lp, RG_MAN_ID_0, &val);
1514         if (rc)
1515                 return rc;
1516         man_id |= val;
1517 
1518         rc = __at86rf230_read(lp, RG_MAN_ID_1, &val);
1519         if (rc)
1520                 return rc;
1521         man_id |= (val << 8);
1522 
1523         rc = __at86rf230_read(lp, RG_PART_NUM, &part);
1524         if (rc)
1525                 return rc;
1526 
1527         rc = __at86rf230_read(lp, RG_VERSION_NUM, &version);
1528         if (rc)
1529                 return rc;
1530 
1531         if (man_id != 0x001f) {
1532                 dev_err(&lp->spi->dev, "Non-Atmel dev found (MAN_ID %02x %02x)\n",
1533                         man_id >> 8, man_id & 0xFF);
1534                 return -EINVAL;
1535         }
1536 
1537         lp->hw->flags = IEEE802154_HW_TX_OMIT_CKSUM |
1538                         IEEE802154_HW_CSMA_PARAMS |
1539                         IEEE802154_HW_FRAME_RETRIES | IEEE802154_HW_AFILT |
1540                         IEEE802154_HW_PROMISCUOUS;
1541 
1542         lp->hw->phy->flags = WPAN_PHY_FLAG_TXPOWER |
1543                              WPAN_PHY_FLAG_CCA_ED_LEVEL |
1544                              WPAN_PHY_FLAG_CCA_MODE;
1545 
1546         lp->hw->phy->supported.cca_modes = BIT(NL802154_CCA_ENERGY) |
1547                 BIT(NL802154_CCA_CARRIER) | BIT(NL802154_CCA_ENERGY_CARRIER);
1548         lp->hw->phy->supported.cca_opts = BIT(NL802154_CCA_OPT_ENERGY_CARRIER_AND) |
1549                 BIT(NL802154_CCA_OPT_ENERGY_CARRIER_OR);
1550 
1551         lp->hw->phy->supported.cca_ed_levels = at86rf23x_ed_levels;
1552         lp->hw->phy->supported.cca_ed_levels_size = ARRAY_SIZE(at86rf23x_ed_levels);
1553 
1554         lp->hw->phy->cca.mode = NL802154_CCA_ENERGY;
1555 
1556         switch (part) {
1557         case 2:
1558                 chip = "at86rf230";
1559                 rc = -ENOTSUPP;
1560                 goto not_supp;
1561         case 3:
1562                 chip = "at86rf231";
1563                 lp->data = &at86rf231_data;
1564                 lp->hw->phy->supported.channels[0] = 0x7FFF800;
1565                 lp->hw->phy->current_channel = 11;
1566                 lp->hw->phy->symbol_duration = 16;
1567                 lp->hw->phy->supported.tx_powers = at86rf231_powers;
1568                 lp->hw->phy->supported.tx_powers_size = ARRAY_SIZE(at86rf231_powers);
1569                 break;
1570         case 7:
1571                 chip = "at86rf212";
1572                 lp->data = &at86rf212_data;
1573                 lp->hw->flags |= IEEE802154_HW_LBT;
1574                 lp->hw->phy->supported.channels[0] = 0x00007FF;
1575                 lp->hw->phy->supported.channels[2] = 0x00007FF;
1576                 lp->hw->phy->current_channel = 5;
1577                 lp->hw->phy->symbol_duration = 25;
1578                 lp->hw->phy->supported.lbt = NL802154_SUPPORTED_BOOL_BOTH;
1579                 lp->hw->phy->supported.tx_powers = at86rf212_powers;
1580                 lp->hw->phy->supported.tx_powers_size = ARRAY_SIZE(at86rf212_powers);
1581                 lp->hw->phy->supported.cca_ed_levels = at86rf212_ed_levels_100;
1582                 lp->hw->phy->supported.cca_ed_levels_size = ARRAY_SIZE(at86rf212_ed_levels_100);
1583                 break;
1584         case 11:
1585                 chip = "at86rf233";
1586                 lp->data = &at86rf233_data;
1587                 lp->hw->phy->supported.channels[0] = 0x7FFF800;
1588                 lp->hw->phy->current_channel = 13;
1589                 lp->hw->phy->symbol_duration = 16;
1590                 lp->hw->phy->supported.tx_powers = at86rf233_powers;
1591                 lp->hw->phy->supported.tx_powers_size = ARRAY_SIZE(at86rf233_powers);
1592                 break;
1593         default:
1594                 chip = "unknown";
1595                 rc = -ENOTSUPP;
1596                 goto not_supp;
1597         }
1598 
1599         lp->hw->phy->cca_ed_level = lp->hw->phy->supported.cca_ed_levels[7];
1600         lp->hw->phy->transmit_power = lp->hw->phy->supported.tx_powers[0];
1601 
1602 not_supp:
1603         dev_info(&lp->spi->dev, "Detected %s chip version %d\n", chip, version);
1604 
1605         return rc;
1606 }
1607 
1608 #ifdef CONFIG_IEEE802154_AT86RF230_DEBUGFS
1609 static struct dentry *at86rf230_debugfs_root;
1610 
1611 static int at86rf230_stats_show(struct seq_file *file, void *offset)
1612 {
1613         struct at86rf230_local *lp = file->private;
1614 
1615         seq_printf(file, "SUCCESS:\t\t%8llu\n", lp->trac.success);
1616         seq_printf(file, "SUCCESS_DATA_PENDING:\t%8llu\n",
1617                    lp->trac.success_data_pending);
1618         seq_printf(file, "SUCCESS_WAIT_FOR_ACK:\t%8llu\n",
1619                    lp->trac.success_wait_for_ack);
1620         seq_printf(file, "CHANNEL_ACCESS_FAILURE:\t%8llu\n",
1621                    lp->trac.channel_access_failure);
1622         seq_printf(file, "NO_ACK:\t\t\t%8llu\n", lp->trac.no_ack);
1623         seq_printf(file, "INVALID:\t\t%8llu\n", lp->trac.invalid);
1624         return 0;
1625 }
1626 
1627 static int at86rf230_stats_open(struct inode *inode, struct file *file)
1628 {
1629         return single_open(file, at86rf230_stats_show, inode->i_private);
1630 }
1631 
1632 static const struct file_operations at86rf230_stats_fops = {
1633         .open           = at86rf230_stats_open,
1634         .read           = seq_read,
1635         .llseek         = seq_lseek,
1636         .release        = single_release,
1637 };
1638 
1639 static int at86rf230_debugfs_init(struct at86rf230_local *lp)
1640 {
1641         char debugfs_dir_name[DNAME_INLINE_LEN + 1] = "at86rf230-";
1642         struct dentry *stats;
1643 
1644         strncat(debugfs_dir_name, dev_name(&lp->spi->dev), DNAME_INLINE_LEN);
1645 
1646         at86rf230_debugfs_root = debugfs_create_dir(debugfs_dir_name, NULL);
1647         if (!at86rf230_debugfs_root)
1648                 return -ENOMEM;
1649 
1650         stats = debugfs_create_file("trac_stats", S_IRUGO,
1651                                     at86rf230_debugfs_root, lp,
1652                                     &at86rf230_stats_fops);
1653         if (!stats)
1654                 return -ENOMEM;
1655 
1656         return 0;
1657 }
1658 
1659 static void at86rf230_debugfs_remove(void)
1660 {
1661         debugfs_remove_recursive(at86rf230_debugfs_root);
1662 }
1663 #else
1664 static int at86rf230_debugfs_init(struct at86rf230_local *lp) { return 0; }
1665 static void at86rf230_debugfs_remove(void) { }
1666 #endif
1667 
1668 static int at86rf230_probe(struct spi_device *spi)
1669 {
1670         struct ieee802154_hw *hw;
1671         struct at86rf230_local *lp;
1672         unsigned int status;
1673         int rc, irq_type, rstn, slp_tr;
1674         u8 xtal_trim = 0;
1675 
1676         if (!spi->irq) {
1677                 dev_err(&spi->dev, "no IRQ specified\n");
1678                 return -EINVAL;
1679         }
1680 
1681         rc = at86rf230_get_pdata(spi, &rstn, &slp_tr, &xtal_trim);
1682         if (rc < 0) {
1683                 dev_err(&spi->dev, "failed to parse platform_data: %d\n", rc);
1684                 return rc;
1685         }
1686 
1687         if (gpio_is_valid(rstn)) {
1688                 rc = devm_gpio_request_one(&spi->dev, rstn,
1689                                            GPIOF_OUT_INIT_HIGH, "rstn");
1690                 if (rc)
1691                         return rc;
1692         }
1693 
1694         if (gpio_is_valid(slp_tr)) {
1695                 rc = devm_gpio_request_one(&spi->dev, slp_tr,
1696                                            GPIOF_OUT_INIT_LOW, "slp_tr");
1697                 if (rc)
1698                         return rc;
1699         }
1700 
1701         /* Reset */
1702         if (gpio_is_valid(rstn)) {
1703                 udelay(1);
1704                 gpio_set_value(rstn, 0);
1705                 udelay(1);
1706                 gpio_set_value(rstn, 1);
1707                 usleep_range(120, 240);
1708         }
1709 
1710         hw = ieee802154_alloc_hw(sizeof(*lp), &at86rf230_ops);
1711         if (!hw)
1712                 return -ENOMEM;
1713 
1714         lp = hw->priv;
1715         lp->hw = hw;
1716         lp->spi = spi;
1717         lp->slp_tr = slp_tr;
1718         hw->parent = &spi->dev;
1719         ieee802154_random_extended_addr(&hw->phy->perm_extended_addr);
1720 
1721         lp->regmap = devm_regmap_init_spi(spi, &at86rf230_regmap_spi_config);
1722         if (IS_ERR(lp->regmap)) {
1723                 rc = PTR_ERR(lp->regmap);
1724                 dev_err(&spi->dev, "Failed to allocate register map: %d\n",
1725                         rc);
1726                 goto free_dev;
1727         }
1728 
1729         at86rf230_setup_spi_messages(lp, &lp->state);
1730         at86rf230_setup_spi_messages(lp, &lp->tx);
1731 
1732         rc = at86rf230_detect_device(lp);
1733         if (rc < 0)
1734                 goto free_dev;
1735 
1736         init_completion(&lp->state_complete);
1737 
1738         spi_set_drvdata(spi, lp);
1739 
1740         rc = at86rf230_hw_init(lp, xtal_trim);
1741         if (rc)
1742                 goto free_dev;
1743 
1744         /* Read irq status register to reset irq line */
1745         rc = at86rf230_read_subreg(lp, RG_IRQ_STATUS, 0xff, 0, &status);
1746         if (rc)
1747                 goto free_dev;
1748 
1749         irq_type = irq_get_trigger_type(spi->irq);
1750         if (!irq_type)
1751                 irq_type = IRQF_TRIGGER_HIGH;
1752 
1753         rc = devm_request_irq(&spi->dev, spi->irq, at86rf230_isr,
1754                               IRQF_SHARED | irq_type, dev_name(&spi->dev), lp);
1755         if (rc)
1756                 goto free_dev;
1757 
1758         /* disable_irq by default and wait for starting hardware */
1759         disable_irq(spi->irq);
1760 
1761         /* going into sleep by default */
1762         at86rf230_sleep(lp);
1763 
1764         rc = at86rf230_debugfs_init(lp);
1765         if (rc)
1766                 goto free_dev;
1767 
1768         rc = ieee802154_register_hw(lp->hw);
1769         if (rc)
1770                 goto free_debugfs;
1771 
1772         return rc;
1773 
1774 free_debugfs:
1775         at86rf230_debugfs_remove();
1776 free_dev:
1777         ieee802154_free_hw(lp->hw);
1778 
1779         return rc;
1780 }
1781 
1782 static int at86rf230_remove(struct spi_device *spi)
1783 {
1784         struct at86rf230_local *lp = spi_get_drvdata(spi);
1785 
1786         /* mask all at86rf230 irq's */
1787         at86rf230_write_subreg(lp, SR_IRQ_MASK, 0);
1788         ieee802154_unregister_hw(lp->hw);
1789         ieee802154_free_hw(lp->hw);
1790         at86rf230_debugfs_remove();
1791         dev_dbg(&spi->dev, "unregistered at86rf230\n");
1792 
1793         return 0;
1794 }
1795 
1796 static const struct of_device_id at86rf230_of_match[] = {
1797         { .compatible = "atmel,at86rf230", },
1798         { .compatible = "atmel,at86rf231", },
1799         { .compatible = "atmel,at86rf233", },
1800         { .compatible = "atmel,at86rf212", },
1801         { },
1802 };
1803 MODULE_DEVICE_TABLE(of, at86rf230_of_match);
1804 
1805 static const struct spi_device_id at86rf230_device_id[] = {
1806         { .name = "at86rf230", },
1807         { .name = "at86rf231", },
1808         { .name = "at86rf233", },
1809         { .name = "at86rf212", },
1810         { },
1811 };
1812 MODULE_DEVICE_TABLE(spi, at86rf230_device_id);
1813 
1814 static struct spi_driver at86rf230_driver = {
1815         .id_table = at86rf230_device_id,
1816         .driver = {
1817                 .of_match_table = of_match_ptr(at86rf230_of_match),
1818                 .name   = "at86rf230",
1819         },
1820         .probe      = at86rf230_probe,
1821         .remove     = at86rf230_remove,
1822 };
1823 
1824 module_spi_driver(at86rf230_driver);
1825 
1826 MODULE_DESCRIPTION("AT86RF230 Transceiver Driver");
1827 MODULE_LICENSE("GPL v2");
1828 

This page was automatically generated by LXR 0.3.1 (source).  •  Linux is a registered trademark of Linus Torvalds  •  Contact us