1
2
3
4
5
6
7#include <linux/kernel.h>
8#include <linux/module.h>
9#include <linux/gpio/consumer.h>
10#include <linux/spi/spi.h>
11#include <linux/workqueue.h>
12#include <linux/interrupt.h>
13#include <linux/irq.h>
14#include <linux/skbuff.h>
15#include <linux/of_gpio.h>
16#include <linux/regmap.h>
17#include <linux/ieee802154.h>
18#include <linux/debugfs.h>
19
20#include <net/mac802154.h>
21#include <net/cfg802154.h>
22
23#include <linux/device.h>
24
25#include "mcr20a.h"
26
27#define SPI_COMMAND_BUFFER 3
28
29#define REGISTER_READ BIT(7)
30#define REGISTER_WRITE (0 << 7)
31#define REGISTER_ACCESS (0 << 6)
32#define PACKET_BUFF_BURST_ACCESS BIT(6)
33#define PACKET_BUFF_BYTE_ACCESS BIT(5)
34
35#define MCR20A_WRITE_REG(x) (x)
36#define MCR20A_READ_REG(x) (REGISTER_READ | (x))
37#define MCR20A_BURST_READ_PACKET_BUF (0xC0)
38#define MCR20A_BURST_WRITE_PACKET_BUF (0x40)
39
40#define MCR20A_CMD_REG 0x80
41#define MCR20A_CMD_REG_MASK 0x3f
42#define MCR20A_CMD_WRITE 0x40
43#define MCR20A_CMD_FB 0x20
44
45
46#define MCR20A_IRQSTS_NUM 2
47
48
49enum {
50 MCR20A_CCA_ED,
51
52 MCR20A_CCA_MODE1,
53 MCR20A_CCA_MODE2,
54 MCR20A_CCA_MODE3
55};
56
57enum {
58 MCR20A_XCVSEQ_IDLE = 0x00,
59 MCR20A_XCVSEQ_RX = 0x01,
60 MCR20A_XCVSEQ_TX = 0x02,
61 MCR20A_XCVSEQ_CCA = 0x03,
62 MCR20A_XCVSEQ_TR = 0x04,
63 MCR20A_XCVSEQ_CCCA = 0x05,
64};
65
66
67#define MCR20A_MIN_CHANNEL (11)
68#define MCR20A_MAX_CHANNEL (26)
69#define MCR20A_CHANNEL_SPACING (5)
70
71
72#define MCR20A_MIN_CCA_THRESHOLD (0x6EU)
73#define MCR20A_MAX_CCA_THRESHOLD (0x00U)
74
75
76#define MCR20A_OVERWRITE_VERSION (0x0C)
77
78
79static const u8 PLL_INT[16] = {
80 0x0B, 0x0B, 0x0B,
81 0x0B, 0x0B, 0x0B,
82 0x0C, 0x0C, 0x0C,
83 0x0C, 0x0C, 0x0C,
84 0x0D, 0x0D, 0x0D,
85 0x0D
86};
87
88static const u8 PLL_FRAC[16] = {
89 0x28, 0x50, 0x78,
90 0xA0, 0xC8, 0xF0,
91 0x18, 0x40, 0x68,
92 0x90, 0xB8, 0xE0,
93 0x08, 0x30, 0x58,
94 0x80
95};
96
97static const struct reg_sequence mar20a_iar_overwrites[] = {
98 { IAR_MISC_PAD_CTRL, 0x02 },
99 { IAR_VCO_CTRL1, 0xB3 },
100 { IAR_VCO_CTRL2, 0x07 },
101 { IAR_PA_TUNING, 0x71 },
102 { IAR_CHF_IBUF, 0x2F },
103 { IAR_CHF_QBUF, 0x2F },
104 { IAR_CHF_IRIN, 0x24 },
105 { IAR_CHF_QRIN, 0x24 },
106 { IAR_CHF_IL, 0x24 },
107 { IAR_CHF_QL, 0x24 },
108 { IAR_CHF_CC1, 0x32 },
109 { IAR_CHF_CCL, 0x1D },
110 { IAR_CHF_CC2, 0x2D },
111 { IAR_CHF_IROUT, 0x24 },
112 { IAR_CHF_QROUT, 0x24 },
113 { IAR_PA_CAL, 0x28 },
114 { IAR_AGC_THR1, 0x55 },
115 { IAR_AGC_THR2, 0x2D },
116 { IAR_ATT_RSSI1, 0x5F },
117 { IAR_ATT_RSSI2, 0x8F },
118 { IAR_RSSI_OFFSET, 0x61 },
119 { IAR_CHF_PMA_GAIN, 0x03 },
120 { IAR_CCA1_THRESH, 0x50 },
121 { IAR_CORR_NVAL, 0x13 },
122 { IAR_ACKDELAY, 0x3D },
123};
124
125#define MCR20A_VALID_CHANNELS (0x07FFF800)
126#define MCR20A_MAX_BUF (127)
127
128#define printdev(X) (&X->spi->dev)
129
130
131#define MCR20A_DAR_WRITE 0x01
132#define MCR20A_DAR_READ 0x00
133#define MCR20A_DAR_NUMREGS 0x3F
134
135
136#define MCR20A_IAR_ACCESS 0x80
137#define MCR20A_IAR_NUMREGS 0xBEFF
138
139
140#define MCR20A_READSHORT(reg) ((reg) << 1)
141#define MCR20A_WRITESHORT(reg) ((reg) << 1 | 1)
142#define MCR20A_READLONG(reg) (1 << 15 | (reg) << 5)
143#define MCR20A_WRITELONG(reg) (1 << 15 | (reg) << 5 | 1 << 4)
144
145
146#define MCR20A_PHY_INDIRECT_QUEUE_SIZE (12)
147
148static bool
149mcr20a_dar_writeable(struct device *dev, unsigned int reg)
150{
151 switch (reg) {
152 case DAR_IRQ_STS1:
153 case DAR_IRQ_STS2:
154 case DAR_IRQ_STS3:
155 case DAR_PHY_CTRL1:
156 case DAR_PHY_CTRL2:
157 case DAR_PHY_CTRL3:
158 case DAR_PHY_CTRL4:
159 case DAR_SRC_CTRL:
160 case DAR_SRC_ADDRS_SUM_LSB:
161 case DAR_SRC_ADDRS_SUM_MSB:
162 case DAR_T3CMP_LSB:
163 case DAR_T3CMP_MSB:
164 case DAR_T3CMP_USB:
165 case DAR_T2PRIMECMP_LSB:
166 case DAR_T2PRIMECMP_MSB:
167 case DAR_T1CMP_LSB:
168 case DAR_T1CMP_MSB:
169 case DAR_T1CMP_USB:
170 case DAR_T2CMP_LSB:
171 case DAR_T2CMP_MSB:
172 case DAR_T2CMP_USB:
173 case DAR_T4CMP_LSB:
174 case DAR_T4CMP_MSB:
175 case DAR_T4CMP_USB:
176 case DAR_PLL_INT0:
177 case DAR_PLL_FRAC0_LSB:
178 case DAR_PLL_FRAC0_MSB:
179 case DAR_PA_PWR:
180
181 case DAR_OVERWRITE_VER:
182 case DAR_CLK_OUT_CTRL:
183 case DAR_PWR_MODES:
184 return true;
185 default:
186 return false;
187 }
188}
189
190static bool
191mcr20a_dar_readable(struct device *dev, unsigned int reg)
192{
193 bool rc;
194
195
196 rc = mcr20a_dar_writeable(dev, reg);
197 if (rc)
198 return rc;
199
200
201 switch (reg) {
202 case DAR_RX_FRM_LEN:
203 case DAR_CCA1_ED_FNL:
204 case DAR_EVENT_TMR_LSB:
205 case DAR_EVENT_TMR_MSB:
206 case DAR_EVENT_TMR_USB:
207 case DAR_TIMESTAMP_LSB:
208 case DAR_TIMESTAMP_MSB:
209 case DAR_TIMESTAMP_USB:
210 case DAR_SEQ_STATE:
211 case DAR_LQI_VALUE:
212 case DAR_RSSI_CCA_CONT:
213 return true;
214 default:
215 return false;
216 }
217}
218
219static bool
220mcr20a_dar_volatile(struct device *dev, unsigned int reg)
221{
222
223 switch (reg) {
224 case DAR_IRQ_STS1:
225 case DAR_IRQ_STS2:
226 case DAR_IRQ_STS3:
227
228 return true;
229 default:
230 return false;
231 }
232}
233
234static bool
235mcr20a_dar_precious(struct device *dev, unsigned int reg)
236{
237
238 switch (reg) {
239 case DAR_IRQ_STS1:
240 case DAR_IRQ_STS2:
241 case DAR_IRQ_STS3:
242 return true;
243 default:
244 return false;
245 }
246}
247
248static const struct regmap_config mcr20a_dar_regmap = {
249 .name = "mcr20a_dar",
250 .reg_bits = 8,
251 .val_bits = 8,
252 .write_flag_mask = REGISTER_ACCESS | REGISTER_WRITE,
253 .read_flag_mask = REGISTER_ACCESS | REGISTER_READ,
254 .cache_type = REGCACHE_RBTREE,
255 .writeable_reg = mcr20a_dar_writeable,
256 .readable_reg = mcr20a_dar_readable,
257 .volatile_reg = mcr20a_dar_volatile,
258 .precious_reg = mcr20a_dar_precious,
259 .fast_io = true,
260 .can_multi_write = true,
261};
262
263static bool
264mcr20a_iar_writeable(struct device *dev, unsigned int reg)
265{
266 switch (reg) {
267 case IAR_XTAL_TRIM:
268 case IAR_PMC_LP_TRIM:
269 case IAR_MACPANID0_LSB:
270 case IAR_MACPANID0_MSB:
271 case IAR_MACSHORTADDRS0_LSB:
272 case IAR_MACSHORTADDRS0_MSB:
273 case IAR_MACLONGADDRS0_0:
274 case IAR_MACLONGADDRS0_8:
275 case IAR_MACLONGADDRS0_16:
276 case IAR_MACLONGADDRS0_24:
277 case IAR_MACLONGADDRS0_32:
278 case IAR_MACLONGADDRS0_40:
279 case IAR_MACLONGADDRS0_48:
280 case IAR_MACLONGADDRS0_56:
281 case IAR_RX_FRAME_FILTER:
282 case IAR_PLL_INT1:
283 case IAR_PLL_FRAC1_LSB:
284 case IAR_PLL_FRAC1_MSB:
285 case IAR_MACPANID1_LSB:
286 case IAR_MACPANID1_MSB:
287 case IAR_MACSHORTADDRS1_LSB:
288 case IAR_MACSHORTADDRS1_MSB:
289 case IAR_MACLONGADDRS1_0:
290 case IAR_MACLONGADDRS1_8:
291 case IAR_MACLONGADDRS1_16:
292 case IAR_MACLONGADDRS1_24:
293 case IAR_MACLONGADDRS1_32:
294 case IAR_MACLONGADDRS1_40:
295 case IAR_MACLONGADDRS1_48:
296 case IAR_MACLONGADDRS1_56:
297 case IAR_DUAL_PAN_CTRL:
298 case IAR_DUAL_PAN_DWELL:
299 case IAR_CCA1_THRESH:
300 case IAR_CCA1_ED_OFFSET_COMP:
301 case IAR_LQI_OFFSET_COMP:
302 case IAR_CCA_CTRL:
303 case IAR_CCA2_CORR_PEAKS:
304 case IAR_CCA2_CORR_THRESH:
305 case IAR_TMR_PRESCALE:
306 case IAR_ANT_PAD_CTRL:
307 case IAR_MISC_PAD_CTRL:
308 case IAR_BSM_CTRL:
309 case IAR_RNG:
310 case IAR_RX_WTR_MARK:
311 case IAR_SOFT_RESET:
312 case IAR_TXDELAY:
313 case IAR_ACKDELAY:
314 case IAR_CORR_NVAL:
315 case IAR_ANT_AGC_CTRL:
316 case IAR_AGC_THR1:
317 case IAR_AGC_THR2:
318 case IAR_PA_CAL:
319 case IAR_ATT_RSSI1:
320 case IAR_ATT_RSSI2:
321 case IAR_RSSI_OFFSET:
322 case IAR_XTAL_CTRL:
323 case IAR_CHF_PMA_GAIN:
324 case IAR_CHF_IBUF:
325 case IAR_CHF_QBUF:
326 case IAR_CHF_IRIN:
327 case IAR_CHF_QRIN:
328 case IAR_CHF_IL:
329 case IAR_CHF_QL:
330 case IAR_CHF_CC1:
331 case IAR_CHF_CCL:
332 case IAR_CHF_CC2:
333 case IAR_CHF_IROUT:
334 case IAR_CHF_QROUT:
335 case IAR_PA_TUNING:
336 case IAR_VCO_CTRL1:
337 case IAR_VCO_CTRL2:
338 return true;
339 default:
340 return false;
341 }
342}
343
344static bool
345mcr20a_iar_readable(struct device *dev, unsigned int reg)
346{
347 bool rc;
348
349
350 rc = mcr20a_iar_writeable(dev, reg);
351 if (rc)
352 return rc;
353
354
355 switch (reg) {
356 case IAR_PART_ID:
357 case IAR_DUAL_PAN_STS:
358 case IAR_RX_BYTE_COUNT:
359 case IAR_FILTERFAIL_CODE1:
360 case IAR_FILTERFAIL_CODE2:
361 case IAR_RSSI:
362 return true;
363 default:
364 return false;
365 }
366}
367
368static bool
369mcr20a_iar_volatile(struct device *dev, unsigned int reg)
370{
371
372 switch (reg) {
373 case IAR_DUAL_PAN_STS:
374 case IAR_RX_BYTE_COUNT:
375 case IAR_FILTERFAIL_CODE1:
376 case IAR_FILTERFAIL_CODE2:
377 case IAR_RSSI:
378 return true;
379 default:
380 return false;
381 }
382}
383
384static const struct regmap_config mcr20a_iar_regmap = {
385 .name = "mcr20a_iar",
386 .reg_bits = 16,
387 .val_bits = 8,
388 .write_flag_mask = REGISTER_ACCESS | REGISTER_WRITE | IAR_INDEX,
389 .read_flag_mask = REGISTER_ACCESS | REGISTER_READ | IAR_INDEX,
390 .cache_type = REGCACHE_RBTREE,
391 .writeable_reg = mcr20a_iar_writeable,
392 .readable_reg = mcr20a_iar_readable,
393 .volatile_reg = mcr20a_iar_volatile,
394 .fast_io = true,
395};
396
397struct mcr20a_local {
398 struct spi_device *spi;
399
400 struct ieee802154_hw *hw;
401 struct regmap *regmap_dar;
402 struct regmap *regmap_iar;
403
404 u8 *buf;
405
406 bool is_tx;
407
408
409 struct spi_message tx_buf_msg;
410 u8 tx_header[1];
411
412 struct spi_transfer tx_xfer_header;
413 u8 tx_len[1];
414
415 struct spi_transfer tx_xfer_len;
416
417 struct spi_transfer tx_xfer_buf;
418 struct sk_buff *tx_skb;
419
420
421 struct spi_message reg_msg;
422 u8 reg_cmd[1];
423 u8 reg_data[MCR20A_IRQSTS_NUM];
424 struct spi_transfer reg_xfer_cmd;
425 struct spi_transfer reg_xfer_data;
426
427
428 struct spi_message rx_buf_msg;
429 u8 rx_header[1];
430 struct spi_transfer rx_xfer_header;
431 u8 rx_lqi[1];
432 struct spi_transfer rx_xfer_lqi;
433 u8 rx_buf[MCR20A_MAX_BUF];
434 struct spi_transfer rx_xfer_buf;
435
436
437 struct spi_message irq_msg;
438 u8 irq_header[1];
439 u8 irq_data[MCR20A_IRQSTS_NUM];
440 struct spi_transfer irq_xfer_data;
441 struct spi_transfer irq_xfer_header;
442};
443
444static void
445mcr20a_write_tx_buf_complete(void *context)
446{
447 struct mcr20a_local *lp = context;
448 int ret;
449
450 dev_dbg(printdev(lp), "%s\n", __func__);
451
452 lp->reg_msg.complete = NULL;
453 lp->reg_cmd[0] = MCR20A_WRITE_REG(DAR_PHY_CTRL1);
454 lp->reg_data[0] = MCR20A_XCVSEQ_TX;
455 lp->reg_xfer_data.len = 1;
456
457 ret = spi_async(lp->spi, &lp->reg_msg);
458 if (ret)
459 dev_err(printdev(lp), "failed to set SEQ TX\n");
460}
461
462static int
463mcr20a_xmit(struct ieee802154_hw *hw, struct sk_buff *skb)
464{
465 struct mcr20a_local *lp = hw->priv;
466
467 dev_dbg(printdev(lp), "%s\n", __func__);
468
469 lp->tx_skb = skb;
470
471 print_hex_dump_debug("mcr20a tx: ", DUMP_PREFIX_OFFSET, 16, 1,
472 skb->data, skb->len, 0);
473
474 lp->is_tx = 1;
475
476 lp->reg_msg.complete = NULL;
477 lp->reg_cmd[0] = MCR20A_WRITE_REG(DAR_PHY_CTRL1);
478 lp->reg_data[0] = MCR20A_XCVSEQ_IDLE;
479 lp->reg_xfer_data.len = 1;
480
481 return spi_async(lp->spi, &lp->reg_msg);
482}
483
484static int
485mcr20a_ed(struct ieee802154_hw *hw, u8 *level)
486{
487 WARN_ON(!level);
488 *level = 0xbe;
489 return 0;
490}
491
492static int
493mcr20a_set_channel(struct ieee802154_hw *hw, u8 page, u8 channel)
494{
495 struct mcr20a_local *lp = hw->priv;
496 int ret;
497
498 dev_dbg(printdev(lp), "%s\n", __func__);
499
500
501 ret = regmap_write(lp->regmap_dar, DAR_PLL_INT0, PLL_INT[channel - 11]);
502 if (ret)
503 return ret;
504 ret = regmap_write(lp->regmap_dar, DAR_PLL_FRAC0_LSB, 0x00);
505 if (ret)
506 return ret;
507 ret = regmap_write(lp->regmap_dar, DAR_PLL_FRAC0_MSB,
508 PLL_FRAC[channel - 11]);
509 if (ret)
510 return ret;
511
512 return 0;
513}
514
515static int
516mcr20a_start(struct ieee802154_hw *hw)
517{
518 struct mcr20a_local *lp = hw->priv;
519 int ret;
520
521 dev_dbg(printdev(lp), "%s\n", __func__);
522
523
524 dev_dbg(printdev(lp), "no slotted operation\n");
525 ret = regmap_update_bits(lp->regmap_dar, DAR_PHY_CTRL1,
526 DAR_PHY_CTRL1_SLOTTED, 0x0);
527 if (ret < 0)
528 return ret;
529
530
531 enable_irq(lp->spi->irq);
532
533
534 ret = regmap_update_bits(lp->regmap_dar, DAR_PHY_CTRL2,
535 DAR_PHY_CTRL2_SEQMSK, 0x0);
536 if (ret < 0)
537 return ret;
538
539
540 dev_dbg(printdev(lp), "start the RX sequence\n");
541 ret = regmap_update_bits(lp->regmap_dar, DAR_PHY_CTRL1,
542 DAR_PHY_CTRL1_XCVSEQ_MASK, MCR20A_XCVSEQ_RX);
543 if (ret < 0)
544 return ret;
545
546 return 0;
547}
548
549static void
550mcr20a_stop(struct ieee802154_hw *hw)
551{
552 struct mcr20a_local *lp = hw->priv;
553
554 dev_dbg(printdev(lp), "%s\n", __func__);
555
556
557 regmap_update_bits(lp->regmap_dar, DAR_PHY_CTRL1,
558 DAR_PHY_CTRL1_XCVSEQ_MASK, MCR20A_XCVSEQ_IDLE);
559
560
561 disable_irq(lp->spi->irq);
562}
563
564static int
565mcr20a_set_hw_addr_filt(struct ieee802154_hw *hw,
566 struct ieee802154_hw_addr_filt *filt,
567 unsigned long changed)
568{
569 struct mcr20a_local *lp = hw->priv;
570
571 dev_dbg(printdev(lp), "%s\n", __func__);
572
573 if (changed & IEEE802154_AFILT_SADDR_CHANGED) {
574 u16 addr = le16_to_cpu(filt->short_addr);
575
576 regmap_write(lp->regmap_iar, IAR_MACSHORTADDRS0_LSB, addr);
577 regmap_write(lp->regmap_iar, IAR_MACSHORTADDRS0_MSB, addr >> 8);
578 }
579
580 if (changed & IEEE802154_AFILT_PANID_CHANGED) {
581 u16 pan = le16_to_cpu(filt->pan_id);
582
583 regmap_write(lp->regmap_iar, IAR_MACPANID0_LSB, pan);
584 regmap_write(lp->regmap_iar, IAR_MACPANID0_MSB, pan >> 8);
585 }
586
587 if (changed & IEEE802154_AFILT_IEEEADDR_CHANGED) {
588 u8 addr[8], i;
589
590 memcpy(addr, &filt->ieee_addr, 8);
591 for (i = 0; i < 8; i++)
592 regmap_write(lp->regmap_iar,
593 IAR_MACLONGADDRS0_0 + i, addr[i]);
594 }
595
596 if (changed & IEEE802154_AFILT_PANC_CHANGED) {
597 if (filt->pan_coord) {
598 regmap_update_bits(lp->regmap_dar, DAR_PHY_CTRL4,
599 DAR_PHY_CTRL4_PANCORDNTR0, 0x10);
600 } else {
601 regmap_update_bits(lp->regmap_dar, DAR_PHY_CTRL4,
602 DAR_PHY_CTRL4_PANCORDNTR0, 0x00);
603 }
604 }
605
606 return 0;
607}
608
609
610#define MCR20A_MAX_TX_POWERS 0x14
611static const s32 mcr20a_powers[MCR20A_MAX_TX_POWERS + 1] = {
612 -3000, -2800, -2600, -2400, -2200, -2000, -1800, -1600, -1400,
613 -1200, -1000, -800, -600, -400, -200, 0, 200, 400, 600, 800, 1000
614};
615
616static int
617mcr20a_set_txpower(struct ieee802154_hw *hw, s32 mbm)
618{
619 struct mcr20a_local *lp = hw->priv;
620 u32 i;
621
622 dev_dbg(printdev(lp), "%s(%d)\n", __func__, mbm);
623
624 for (i = 0; i < lp->hw->phy->supported.tx_powers_size; i++) {
625 if (lp->hw->phy->supported.tx_powers[i] == mbm)
626 return regmap_write(lp->regmap_dar, DAR_PA_PWR,
627 ((i + 8) & 0x1F));
628 }
629
630 return -EINVAL;
631}
632
633#define MCR20A_MAX_ED_LEVELS MCR20A_MIN_CCA_THRESHOLD
634static s32 mcr20a_ed_levels[MCR20A_MAX_ED_LEVELS + 1];
635
636static int
637mcr20a_set_cca_mode(struct ieee802154_hw *hw,
638 const struct wpan_phy_cca *cca)
639{
640 struct mcr20a_local *lp = hw->priv;
641 unsigned int cca_mode = 0xff;
642 bool cca_mode_and = false;
643 int ret;
644
645 dev_dbg(printdev(lp), "%s\n", __func__);
646
647
648 switch (cca->mode) {
649 case NL802154_CCA_ENERGY:
650 cca_mode = MCR20A_CCA_MODE1;
651 break;
652 case NL802154_CCA_CARRIER:
653 cca_mode = MCR20A_CCA_MODE2;
654 break;
655 case NL802154_CCA_ENERGY_CARRIER:
656 switch (cca->opt) {
657 case NL802154_CCA_OPT_ENERGY_CARRIER_AND:
658 cca_mode = MCR20A_CCA_MODE3;
659 cca_mode_and = true;
660 break;
661 case NL802154_CCA_OPT_ENERGY_CARRIER_OR:
662 cca_mode = MCR20A_CCA_MODE3;
663 cca_mode_and = false;
664 break;
665 default:
666 return -EINVAL;
667 }
668 break;
669 default:
670 return -EINVAL;
671 }
672 ret = regmap_update_bits(lp->regmap_dar, DAR_PHY_CTRL4,
673 DAR_PHY_CTRL4_CCATYPE_MASK,
674 cca_mode << DAR_PHY_CTRL4_CCATYPE_SHIFT);
675 if (ret < 0)
676 return ret;
677
678 if (cca_mode == MCR20A_CCA_MODE3) {
679 if (cca_mode_and) {
680 ret = regmap_update_bits(lp->regmap_iar, IAR_CCA_CTRL,
681 IAR_CCA_CTRL_CCA3_AND_NOT_OR,
682 0x08);
683 } else {
684 ret = regmap_update_bits(lp->regmap_iar,
685 IAR_CCA_CTRL,
686 IAR_CCA_CTRL_CCA3_AND_NOT_OR,
687 0x00);
688 }
689 if (ret < 0)
690 return ret;
691 }
692
693 return ret;
694}
695
696static int
697mcr20a_set_cca_ed_level(struct ieee802154_hw *hw, s32 mbm)
698{
699 struct mcr20a_local *lp = hw->priv;
700 u32 i;
701
702 dev_dbg(printdev(lp), "%s\n", __func__);
703
704 for (i = 0; i < hw->phy->supported.cca_ed_levels_size; i++) {
705 if (hw->phy->supported.cca_ed_levels[i] == mbm)
706 return regmap_write(lp->regmap_iar, IAR_CCA1_THRESH, i);
707 }
708
709 return 0;
710}
711
712static int
713mcr20a_set_promiscuous_mode(struct ieee802154_hw *hw, const bool on)
714{
715 struct mcr20a_local *lp = hw->priv;
716 int ret;
717 u8 rx_frame_filter_reg = 0x0;
718
719 dev_dbg(printdev(lp), "%s(%d)\n", __func__, on);
720
721 if (on) {
722
723 rx_frame_filter_reg &= ~(IAR_RX_FRAME_FLT_FRM_VER);
724 rx_frame_filter_reg |= (IAR_RX_FRAME_FLT_ACK_FT |
725 IAR_RX_FRAME_FLT_NS_FT);
726
727 ret = regmap_update_bits(lp->regmap_dar, DAR_PHY_CTRL4,
728 DAR_PHY_CTRL4_PROMISCUOUS,
729 DAR_PHY_CTRL4_PROMISCUOUS);
730 if (ret < 0)
731 return ret;
732
733 ret = regmap_write(lp->regmap_iar, IAR_RX_FRAME_FILTER,
734 rx_frame_filter_reg);
735 if (ret < 0)
736 return ret;
737 } else {
738 ret = regmap_update_bits(lp->regmap_dar, DAR_PHY_CTRL4,
739 DAR_PHY_CTRL4_PROMISCUOUS, 0x0);
740 if (ret < 0)
741 return ret;
742
743 ret = regmap_write(lp->regmap_iar, IAR_RX_FRAME_FILTER,
744 IAR_RX_FRAME_FLT_FRM_VER |
745 IAR_RX_FRAME_FLT_BEACON_FT |
746 IAR_RX_FRAME_FLT_DATA_FT |
747 IAR_RX_FRAME_FLT_CMD_FT);
748 if (ret < 0)
749 return ret;
750 }
751
752 return 0;
753}
754
755static const struct ieee802154_ops mcr20a_hw_ops = {
756 .owner = THIS_MODULE,
757 .xmit_async = mcr20a_xmit,
758 .ed = mcr20a_ed,
759 .set_channel = mcr20a_set_channel,
760 .start = mcr20a_start,
761 .stop = mcr20a_stop,
762 .set_hw_addr_filt = mcr20a_set_hw_addr_filt,
763 .set_txpower = mcr20a_set_txpower,
764 .set_cca_mode = mcr20a_set_cca_mode,
765 .set_cca_ed_level = mcr20a_set_cca_ed_level,
766 .set_promiscuous_mode = mcr20a_set_promiscuous_mode,
767};
768
769static int
770mcr20a_request_rx(struct mcr20a_local *lp)
771{
772 dev_dbg(printdev(lp), "%s\n", __func__);
773
774
775 regmap_update_bits_async(lp->regmap_dar, DAR_PHY_CTRL1,
776 DAR_PHY_CTRL1_XCVSEQ_MASK, MCR20A_XCVSEQ_RX);
777
778 return 0;
779}
780
781static void
782mcr20a_handle_rx_read_buf_complete(void *context)
783{
784 struct mcr20a_local *lp = context;
785 u8 len = lp->reg_data[0] & DAR_RX_FRAME_LENGTH_MASK;
786 struct sk_buff *skb;
787
788 dev_dbg(printdev(lp), "%s\n", __func__);
789
790 dev_dbg(printdev(lp), "RX is done\n");
791
792 if (!ieee802154_is_valid_psdu_len(len)) {
793 dev_vdbg(&lp->spi->dev, "corrupted frame received\n");
794 len = IEEE802154_MTU;
795 }
796
797 len = len - 2;
798
799 skb = dev_alloc_skb(len);
800 if (!skb)
801 return;
802
803 __skb_put_data(skb, lp->rx_buf, len);
804 ieee802154_rx_irqsafe(lp->hw, skb, lp->rx_lqi[0]);
805
806 print_hex_dump_debug("mcr20a rx: ", DUMP_PREFIX_OFFSET, 16, 1,
807 lp->rx_buf, len, 0);
808 pr_debug("mcr20a rx: lqi: %02hhx\n", lp->rx_lqi[0]);
809
810
811 mcr20a_request_rx(lp);
812}
813
814static void
815mcr20a_handle_rx_read_len_complete(void *context)
816{
817 struct mcr20a_local *lp = context;
818 u8 len;
819 int ret;
820
821 dev_dbg(printdev(lp), "%s\n", __func__);
822
823
824 len = lp->reg_data[0] & DAR_RX_FRAME_LENGTH_MASK;
825 dev_dbg(printdev(lp), "frame len : %d\n", len);
826
827
828 lp->rx_buf_msg.complete = mcr20a_handle_rx_read_buf_complete;
829 lp->rx_header[0] = MCR20A_BURST_READ_PACKET_BUF;
830 lp->rx_xfer_buf.len = len;
831
832 ret = spi_async(lp->spi, &lp->rx_buf_msg);
833 if (ret)
834 dev_err(printdev(lp), "failed to read rx buffer length\n");
835}
836
837static int
838mcr20a_handle_rx(struct mcr20a_local *lp)
839{
840 dev_dbg(printdev(lp), "%s\n", __func__);
841 lp->reg_msg.complete = mcr20a_handle_rx_read_len_complete;
842 lp->reg_cmd[0] = MCR20A_READ_REG(DAR_RX_FRM_LEN);
843 lp->reg_xfer_data.len = 1;
844
845 return spi_async(lp->spi, &lp->reg_msg);
846}
847
848static int
849mcr20a_handle_tx_complete(struct mcr20a_local *lp)
850{
851 dev_dbg(printdev(lp), "%s\n", __func__);
852
853 ieee802154_xmit_complete(lp->hw, lp->tx_skb, false);
854
855 return mcr20a_request_rx(lp);
856}
857
858static int
859mcr20a_handle_tx(struct mcr20a_local *lp)
860{
861 int ret;
862
863 dev_dbg(printdev(lp), "%s\n", __func__);
864
865
866 lp->tx_header[0] = MCR20A_BURST_WRITE_PACKET_BUF;
867
868 lp->tx_len[0] = lp->tx_skb->len + 2;
869 lp->tx_xfer_buf.tx_buf = lp->tx_skb->data;
870
871 lp->tx_xfer_buf.len = lp->tx_skb->len + 1;
872
873 ret = spi_async(lp->spi, &lp->tx_buf_msg);
874 if (ret) {
875 dev_err(printdev(lp), "SPI write Failed for TX buf\n");
876 return ret;
877 }
878
879 return 0;
880}
881
882static void
883mcr20a_irq_clean_complete(void *context)
884{
885 struct mcr20a_local *lp = context;
886 u8 seq_state = lp->irq_data[DAR_IRQ_STS1] & DAR_PHY_CTRL1_XCVSEQ_MASK;
887
888 dev_dbg(printdev(lp), "%s\n", __func__);
889
890 enable_irq(lp->spi->irq);
891
892 dev_dbg(printdev(lp), "IRQ STA1 (%02x) STA2 (%02x)\n",
893 lp->irq_data[DAR_IRQ_STS1], lp->irq_data[DAR_IRQ_STS2]);
894
895 switch (seq_state) {
896
897 case (DAR_IRQSTS1_TXIRQ | DAR_IRQSTS1_SEQIRQ):
898 if (lp->is_tx) {
899 lp->is_tx = 0;
900 dev_dbg(printdev(lp), "TX is done. No ACK\n");
901 mcr20a_handle_tx_complete(lp);
902 }
903 break;
904 case (DAR_IRQSTS1_RXIRQ | DAR_IRQSTS1_SEQIRQ):
905
906 dev_dbg(printdev(lp), "RX is starting\n");
907 mcr20a_handle_rx(lp);
908 break;
909 case (DAR_IRQSTS1_RXIRQ | DAR_IRQSTS1_TXIRQ | DAR_IRQSTS1_SEQIRQ):
910 if (lp->is_tx) {
911
912 lp->is_tx = 0;
913 dev_dbg(printdev(lp), "TX is done. Get ACK\n");
914 mcr20a_handle_tx_complete(lp);
915 } else {
916
917 dev_dbg(printdev(lp), "RX is starting\n");
918 mcr20a_handle_rx(lp);
919 }
920 break;
921 case (DAR_IRQSTS1_SEQIRQ):
922 if (lp->is_tx) {
923 dev_dbg(printdev(lp), "TX is starting\n");
924 mcr20a_handle_tx(lp);
925 } else {
926 dev_dbg(printdev(lp), "MCR20A is stop\n");
927 }
928 break;
929 }
930}
931
932static void mcr20a_irq_status_complete(void *context)
933{
934 int ret;
935 struct mcr20a_local *lp = context;
936
937 dev_dbg(printdev(lp), "%s\n", __func__);
938 regmap_update_bits_async(lp->regmap_dar, DAR_PHY_CTRL1,
939 DAR_PHY_CTRL1_XCVSEQ_MASK, MCR20A_XCVSEQ_IDLE);
940
941 lp->reg_msg.complete = mcr20a_irq_clean_complete;
942 lp->reg_cmd[0] = MCR20A_WRITE_REG(DAR_IRQ_STS1);
943 memcpy(lp->reg_data, lp->irq_data, MCR20A_IRQSTS_NUM);
944 lp->reg_xfer_data.len = MCR20A_IRQSTS_NUM;
945
946 ret = spi_async(lp->spi, &lp->reg_msg);
947
948 if (ret)
949 dev_err(printdev(lp), "failed to clean irq status\n");
950}
951
952static irqreturn_t mcr20a_irq_isr(int irq, void *data)
953{
954 struct mcr20a_local *lp = data;
955 int ret;
956
957 disable_irq_nosync(irq);
958
959 lp->irq_header[0] = MCR20A_READ_REG(DAR_IRQ_STS1);
960
961 ret = spi_async(lp->spi, &lp->irq_msg);
962 if (ret) {
963 enable_irq(irq);
964 return IRQ_NONE;
965 }
966
967 return IRQ_HANDLED;
968}
969
970static void mcr20a_hw_setup(struct mcr20a_local *lp)
971{
972 u8 i;
973 struct ieee802154_hw *hw = lp->hw;
974 struct wpan_phy *phy = lp->hw->phy;
975
976 dev_dbg(printdev(lp), "%s\n", __func__);
977
978 phy->symbol_duration = 16;
979 phy->lifs_period = 40;
980 phy->sifs_period = 12;
981
982 hw->flags = IEEE802154_HW_TX_OMIT_CKSUM |
983 IEEE802154_HW_AFILT |
984 IEEE802154_HW_PROMISCUOUS;
985
986 phy->flags = WPAN_PHY_FLAG_TXPOWER | WPAN_PHY_FLAG_CCA_ED_LEVEL |
987 WPAN_PHY_FLAG_CCA_MODE;
988
989 phy->supported.cca_modes = BIT(NL802154_CCA_ENERGY) |
990 BIT(NL802154_CCA_CARRIER) | BIT(NL802154_CCA_ENERGY_CARRIER);
991 phy->supported.cca_opts = BIT(NL802154_CCA_OPT_ENERGY_CARRIER_AND) |
992 BIT(NL802154_CCA_OPT_ENERGY_CARRIER_OR);
993
994
995 for (i = MCR20A_MAX_CCA_THRESHOLD; i < MCR20A_MIN_CCA_THRESHOLD + 1;
996 ++i) {
997 mcr20a_ed_levels[i] = -i * 100;
998 }
999
1000 phy->supported.cca_ed_levels = mcr20a_ed_levels;
1001 phy->supported.cca_ed_levels_size = ARRAY_SIZE(mcr20a_ed_levels);
1002
1003 phy->cca.mode = NL802154_CCA_ENERGY;
1004
1005 phy->supported.channels[0] = MCR20A_VALID_CHANNELS;
1006 phy->current_page = 0;
1007
1008 phy->current_channel = 20;
1009 phy->symbol_duration = 16;
1010 phy->supported.tx_powers = mcr20a_powers;
1011 phy->supported.tx_powers_size = ARRAY_SIZE(mcr20a_powers);
1012 phy->cca_ed_level = phy->supported.cca_ed_levels[75];
1013 phy->transmit_power = phy->supported.tx_powers[0x0F];
1014}
1015
1016static void
1017mcr20a_setup_tx_spi_messages(struct mcr20a_local *lp)
1018{
1019 spi_message_init(&lp->tx_buf_msg);
1020 lp->tx_buf_msg.context = lp;
1021 lp->tx_buf_msg.complete = mcr20a_write_tx_buf_complete;
1022
1023 lp->tx_xfer_header.len = 1;
1024 lp->tx_xfer_header.tx_buf = lp->tx_header;
1025
1026 lp->tx_xfer_len.len = 1;
1027 lp->tx_xfer_len.tx_buf = lp->tx_len;
1028
1029 spi_message_add_tail(&lp->tx_xfer_header, &lp->tx_buf_msg);
1030 spi_message_add_tail(&lp->tx_xfer_len, &lp->tx_buf_msg);
1031 spi_message_add_tail(&lp->tx_xfer_buf, &lp->tx_buf_msg);
1032}
1033
1034static void
1035mcr20a_setup_rx_spi_messages(struct mcr20a_local *lp)
1036{
1037 spi_message_init(&lp->reg_msg);
1038 lp->reg_msg.context = lp;
1039
1040 lp->reg_xfer_cmd.len = 1;
1041 lp->reg_xfer_cmd.tx_buf = lp->reg_cmd;
1042 lp->reg_xfer_cmd.rx_buf = lp->reg_cmd;
1043
1044 lp->reg_xfer_data.rx_buf = lp->reg_data;
1045 lp->reg_xfer_data.tx_buf = lp->reg_data;
1046
1047 spi_message_add_tail(&lp->reg_xfer_cmd, &lp->reg_msg);
1048 spi_message_add_tail(&lp->reg_xfer_data, &lp->reg_msg);
1049
1050 spi_message_init(&lp->rx_buf_msg);
1051 lp->rx_buf_msg.context = lp;
1052 lp->rx_buf_msg.complete = mcr20a_handle_rx_read_buf_complete;
1053 lp->rx_xfer_header.len = 1;
1054 lp->rx_xfer_header.tx_buf = lp->rx_header;
1055 lp->rx_xfer_header.rx_buf = lp->rx_header;
1056
1057 lp->rx_xfer_buf.rx_buf = lp->rx_buf;
1058
1059 lp->rx_xfer_lqi.len = 1;
1060 lp->rx_xfer_lqi.rx_buf = lp->rx_lqi;
1061
1062 spi_message_add_tail(&lp->rx_xfer_header, &lp->rx_buf_msg);
1063 spi_message_add_tail(&lp->rx_xfer_buf, &lp->rx_buf_msg);
1064 spi_message_add_tail(&lp->rx_xfer_lqi, &lp->rx_buf_msg);
1065}
1066
1067static void
1068mcr20a_setup_irq_spi_messages(struct mcr20a_local *lp)
1069{
1070 spi_message_init(&lp->irq_msg);
1071 lp->irq_msg.context = lp;
1072 lp->irq_msg.complete = mcr20a_irq_status_complete;
1073 lp->irq_xfer_header.len = 1;
1074 lp->irq_xfer_header.tx_buf = lp->irq_header;
1075 lp->irq_xfer_header.rx_buf = lp->irq_header;
1076
1077 lp->irq_xfer_data.len = MCR20A_IRQSTS_NUM;
1078 lp->irq_xfer_data.rx_buf = lp->irq_data;
1079
1080 spi_message_add_tail(&lp->irq_xfer_header, &lp->irq_msg);
1081 spi_message_add_tail(&lp->irq_xfer_data, &lp->irq_msg);
1082}
1083
1084static int
1085mcr20a_phy_init(struct mcr20a_local *lp)
1086{
1087 u8 index;
1088 unsigned int phy_reg = 0;
1089 int ret;
1090
1091 dev_dbg(printdev(lp), "%s\n", __func__);
1092
1093
1094 ret = regmap_write(lp->regmap_iar, IAR_MISC_PAD_CTRL, 0x02);
1095 if (ret)
1096 goto err_ret;
1097
1098
1099
1100
1101 ret = regmap_write(lp->regmap_dar, DAR_IRQ_STS1, 0xEF);
1102 if (ret)
1103 goto err_ret;
1104
1105
1106 ret = regmap_write(lp->regmap_dar, DAR_IRQ_STS2,
1107 DAR_IRQSTS2_ASM_IRQ | DAR_IRQSTS2_PB_ERR_IRQ |
1108 DAR_IRQSTS2_WAKE_IRQ);
1109 if (ret)
1110 goto err_ret;
1111
1112
1113 ret = regmap_write(lp->regmap_dar, DAR_IRQ_STS3, 0xFF);
1114 if (ret)
1115 goto err_ret;
1116
1117
1118 ret = regmap_update_bits(lp->regmap_dar, DAR_PHY_CTRL1,
1119 DAR_PHY_CTRL1_AUTOACK, DAR_PHY_CTRL1_AUTOACK);
1120
1121
1122 ret = regmap_write(lp->regmap_dar, DAR_PHY_CTRL2, 0xFF);
1123 if (ret)
1124 goto err_ret;
1125
1126
1127 ret = regmap_write(lp->regmap_dar, DAR_PHY_CTRL3,
1128 DAR_PHY_CTRL3_ASM_MSK | DAR_PHY_CTRL3_PB_ERR_MSK |
1129 DAR_PHY_CTRL3_WAKE_MSK);
1130 if (ret)
1131 goto err_ret;
1132
1133
1134
1135
1136 ret = regmap_write(lp->regmap_dar, DAR_SRC_CTRL,
1137 DAR_SRC_CTRL_ACK_FRM_PND |
1138 (DAR_SRC_CTRL_INDEX << DAR_SRC_CTRL_INDEX_SHIFT));
1139 if (ret)
1140 goto err_ret;
1141
1142
1143
1144 ret = regmap_write(lp->regmap_iar, IAR_RX_FRAME_FILTER,
1145 IAR_RX_FRAME_FLT_FRM_VER |
1146 IAR_RX_FRAME_FLT_BEACON_FT |
1147 IAR_RX_FRAME_FLT_DATA_FT |
1148 IAR_RX_FRAME_FLT_CMD_FT);
1149 if (ret)
1150 goto err_ret;
1151
1152 dev_info(printdev(lp), "MCR20A DAR overwrites version: 0x%02x\n",
1153 MCR20A_OVERWRITE_VERSION);
1154
1155
1156 ret = regmap_write(lp->regmap_dar, DAR_OVERWRITE_VER,
1157 MCR20A_OVERWRITE_VERSION);
1158 if (ret)
1159 goto err_ret;
1160
1161
1162 ret = regmap_multi_reg_write(lp->regmap_iar, mar20a_iar_overwrites,
1163 ARRAY_SIZE(mar20a_iar_overwrites));
1164 if (ret)
1165 goto err_ret;
1166
1167
1168 dev_dbg(printdev(lp), "clear HW indirect queue\n");
1169 for (index = 0; index < MCR20A_PHY_INDIRECT_QUEUE_SIZE; index++) {
1170 phy_reg = (u8)(((index & DAR_SRC_CTRL_INDEX) <<
1171 DAR_SRC_CTRL_INDEX_SHIFT)
1172 | (DAR_SRC_CTRL_SRCADDR_EN)
1173 | (DAR_SRC_CTRL_INDEX_DISABLE));
1174 ret = regmap_write(lp->regmap_dar, DAR_SRC_CTRL, phy_reg);
1175 if (ret)
1176 goto err_ret;
1177 phy_reg = 0;
1178 }
1179
1180
1181 ret = regmap_read(lp->regmap_iar, IAR_DUAL_PAN_CTRL, &phy_reg);
1182 if (ret)
1183 goto err_ret;
1184
1185
1186 phy_reg &= ~IAR_DUAL_PAN_CTRL_DUAL_PAN_SAM_LVL_MSK;
1187
1188
1189 phy_reg |= MCR20A_PHY_INDIRECT_QUEUE_SIZE <<
1190 IAR_DUAL_PAN_CTRL_DUAL_PAN_SAM_LVL_SHIFT;
1191 ret = regmap_write(lp->regmap_iar, IAR_DUAL_PAN_CTRL, phy_reg);
1192 if (ret)
1193 goto err_ret;
1194
1195
1196 ret = regmap_write(lp->regmap_iar, IAR_CCA1_THRESH, 0x4B);
1197 if (ret)
1198 goto err_ret;
1199
1200
1201 ret = regmap_write(lp->regmap_iar, IAR_TMR_PRESCALE, 0x05);
1202 if (ret)
1203 goto err_ret;
1204
1205
1206 ret = regmap_update_bits(lp->regmap_dar, DAR_PWR_MODES,
1207 DAR_PWR_MODES_AUTODOZE,
1208 DAR_PWR_MODES_AUTODOZE);
1209 if (ret)
1210 goto err_ret;
1211
1212
1213 ret = regmap_update_bits(lp->regmap_dar, DAR_CLK_OUT_CTRL,
1214 DAR_CLK_OUT_CTRL_EN, 0x0);
1215 if (ret)
1216 goto err_ret;
1217
1218 return 0;
1219
1220err_ret:
1221 return ret;
1222}
1223
1224static int
1225mcr20a_probe(struct spi_device *spi)
1226{
1227 struct ieee802154_hw *hw;
1228 struct mcr20a_local *lp;
1229 struct gpio_desc *rst_b;
1230 int irq_type;
1231 int ret = -ENOMEM;
1232
1233 dev_dbg(&spi->dev, "%s\n", __func__);
1234
1235 if (!spi->irq) {
1236 dev_err(&spi->dev, "no IRQ specified\n");
1237 return -EINVAL;
1238 }
1239
1240 rst_b = devm_gpiod_get(&spi->dev, "rst_b", GPIOD_OUT_HIGH);
1241 if (IS_ERR(rst_b)) {
1242 ret = PTR_ERR(rst_b);
1243 if (ret != -EPROBE_DEFER)
1244 dev_err(&spi->dev, "Failed to get 'rst_b' gpio: %d", ret);
1245 return ret;
1246 }
1247
1248
1249 usleep_range(10, 20);
1250 gpiod_set_value_cansleep(rst_b, 1);
1251 usleep_range(10, 20);
1252 gpiod_set_value_cansleep(rst_b, 0);
1253 usleep_range(120, 240);
1254
1255
1256 hw = ieee802154_alloc_hw(sizeof(*lp), &mcr20a_hw_ops);
1257 if (!hw) {
1258 dev_crit(&spi->dev, "ieee802154_alloc_hw failed\n");
1259 return ret;
1260 }
1261
1262
1263 lp = hw->priv;
1264 lp->hw = hw;
1265 lp->spi = spi;
1266
1267
1268 hw->parent = &spi->dev;
1269 ieee802154_random_extended_addr(&hw->phy->perm_extended_addr);
1270
1271
1272 lp->buf = devm_kzalloc(&spi->dev, SPI_COMMAND_BUFFER, GFP_KERNEL);
1273
1274 if (!lp->buf) {
1275 ret = -ENOMEM;
1276 goto free_dev;
1277 }
1278
1279 mcr20a_setup_tx_spi_messages(lp);
1280 mcr20a_setup_rx_spi_messages(lp);
1281 mcr20a_setup_irq_spi_messages(lp);
1282
1283
1284 lp->regmap_dar = devm_regmap_init_spi(spi, &mcr20a_dar_regmap);
1285 if (IS_ERR(lp->regmap_dar)) {
1286 ret = PTR_ERR(lp->regmap_dar);
1287 dev_err(&spi->dev, "Failed to allocate dar map: %d\n",
1288 ret);
1289 goto free_dev;
1290 }
1291
1292 lp->regmap_iar = devm_regmap_init_spi(spi, &mcr20a_iar_regmap);
1293 if (IS_ERR(lp->regmap_iar)) {
1294 ret = PTR_ERR(lp->regmap_iar);
1295 dev_err(&spi->dev, "Failed to allocate iar map: %d\n", ret);
1296 goto free_dev;
1297 }
1298
1299 mcr20a_hw_setup(lp);
1300
1301 spi_set_drvdata(spi, lp);
1302
1303 ret = mcr20a_phy_init(lp);
1304 if (ret < 0) {
1305 dev_crit(&spi->dev, "mcr20a_phy_init failed\n");
1306 goto free_dev;
1307 }
1308
1309 irq_type = irq_get_trigger_type(spi->irq);
1310 if (!irq_type)
1311 irq_type = IRQF_TRIGGER_FALLING;
1312
1313 ret = devm_request_irq(&spi->dev, spi->irq, mcr20a_irq_isr,
1314 irq_type, dev_name(&spi->dev), lp);
1315 if (ret) {
1316 dev_err(&spi->dev, "could not request_irq for mcr20a\n");
1317 ret = -ENODEV;
1318 goto free_dev;
1319 }
1320
1321
1322 disable_irq(spi->irq);
1323
1324 ret = ieee802154_register_hw(hw);
1325 if (ret) {
1326 dev_crit(&spi->dev, "ieee802154_register_hw failed\n");
1327 goto free_dev;
1328 }
1329
1330 return ret;
1331
1332free_dev:
1333 ieee802154_free_hw(lp->hw);
1334
1335 return ret;
1336}
1337
1338static int mcr20a_remove(struct spi_device *spi)
1339{
1340 struct mcr20a_local *lp = spi_get_drvdata(spi);
1341
1342 dev_dbg(&spi->dev, "%s\n", __func__);
1343
1344 ieee802154_unregister_hw(lp->hw);
1345 ieee802154_free_hw(lp->hw);
1346
1347 return 0;
1348}
1349
1350static const struct of_device_id mcr20a_of_match[] = {
1351 { .compatible = "nxp,mcr20a", },
1352 { },
1353};
1354MODULE_DEVICE_TABLE(of, mcr20a_of_match);
1355
1356static const struct spi_device_id mcr20a_device_id[] = {
1357 { .name = "mcr20a", },
1358 { },
1359};
1360MODULE_DEVICE_TABLE(spi, mcr20a_device_id);
1361
1362static struct spi_driver mcr20a_driver = {
1363 .id_table = mcr20a_device_id,
1364 .driver = {
1365 .of_match_table = of_match_ptr(mcr20a_of_match),
1366 .name = "mcr20a",
1367 },
1368 .probe = mcr20a_probe,
1369 .remove = mcr20a_remove,
1370};
1371
1372module_spi_driver(mcr20a_driver);
1373
1374MODULE_DESCRIPTION("MCR20A Transceiver Driver");
1375MODULE_LICENSE("GPL v2");
1376MODULE_AUTHOR("Xue Liu <liuxuenetmail@gmail>");
1377
