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1// SPDX-License-Identifier: GPL-2.0-only2/*3 * AT86RF230/RF231 driver4 *5 * Copyright (C) 2009-2012 Siemens AG6 *7 * Written by:8 * Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>9 * Alexander Smirnov <alex.bluesman.smirnov@gmail.com>10 * Alexander Aring <aar@pengutronix.de>11 */12#include <linux/kernel.h>13#include <linux/module.h>14#include <linux/gpio/consumer.h>15#include <linux/hrtimer.h>16#include <linux/jiffies.h>17#include <linux/interrupt.h>18#include <linux/irq.h>19#include <linux/delay.h>20#include <linux/property.h>21#include <linux/spi/spi.h>22#include <linux/regmap.h>23#include <linux/skbuff.h>24#include <linux/ieee802154.h>25 26#include <net/mac802154.h>27#include <net/cfg802154.h>28 29#include "at86rf230.h"30 31struct at86rf230_local;32/* at86rf2xx chip depend data.33 * All timings are in us.34 */35struct at86rf2xx_chip_data {36 u16 t_sleep_cycle;37 u16 t_channel_switch;38 u16 t_reset_to_off;39 u16 t_off_to_aack;40 u16 t_off_to_tx_on;41 u16 t_off_to_sleep;42 u16 t_sleep_to_off;43 u16 t_frame;44 u16 t_p_ack;45 int rssi_base_val;46 47 int (*set_channel)(struct at86rf230_local *, u8, u8);48 int (*set_txpower)(struct at86rf230_local *, s32);49};50 51#define AT86RF2XX_MAX_BUF (127 + 3)52/* tx retries to access the TX_ON state53 * if it's above then force change will be started.54 *55 * We assume the max_frame_retries (7) value of 802.15.4 here.56 */57#define AT86RF2XX_MAX_TX_RETRIES 758/* We use the recommended 5 minutes timeout to recalibrate */59#define AT86RF2XX_CAL_LOOP_TIMEOUT (5 * 60 * HZ)60 61struct at86rf230_state_change {62 struct at86rf230_local *lp;63 int irq;64 65 struct hrtimer timer;66 struct spi_message msg;67 struct spi_transfer trx;68 u8 buf[AT86RF2XX_MAX_BUF];69 70 void (*complete)(void *context);71 u8 from_state;72 u8 to_state;73 int trac;74 75 bool free;76};77 78struct at86rf230_local {79 struct spi_device *spi;80 81 struct ieee802154_hw *hw;82 struct at86rf2xx_chip_data *data;83 struct regmap *regmap;84 struct gpio_desc *slp_tr;85 bool sleep;86 87 struct completion state_complete;88 struct at86rf230_state_change state;89 90 unsigned long cal_timeout;91 bool is_tx;92 bool is_tx_from_off;93 bool was_tx;94 u8 tx_retry;95 struct sk_buff *tx_skb;96 struct at86rf230_state_change tx;97};98 99#define AT86RF2XX_NUMREGS 0x3F100 101static void102at86rf230_async_state_change(struct at86rf230_local *lp,103 struct at86rf230_state_change *ctx,104 const u8 state, void (*complete)(void *context));105 106static inline void107at86rf230_sleep(struct at86rf230_local *lp)108{109 if (lp->slp_tr) {110 gpiod_set_value(lp->slp_tr, 1);111 usleep_range(lp->data->t_off_to_sleep,112 lp->data->t_off_to_sleep + 10);113 lp->sleep = true;114 }115}116 117static inline void118at86rf230_awake(struct at86rf230_local *lp)119{120 if (lp->slp_tr) {121 gpiod_set_value(lp->slp_tr, 0);122 usleep_range(lp->data->t_sleep_to_off,123 lp->data->t_sleep_to_off + 100);124 lp->sleep = false;125 }126}127 128static inline int129__at86rf230_write(struct at86rf230_local *lp,130 unsigned int addr, unsigned int data)131{132 bool sleep = lp->sleep;133 int ret;134 135 /* awake for register setting if sleep */136 if (sleep)137 at86rf230_awake(lp);138 139 ret = regmap_write(lp->regmap, addr, data);140 141 /* sleep again if was sleeping */142 if (sleep)143 at86rf230_sleep(lp);144 145 return ret;146}147 148static inline int149__at86rf230_read(struct at86rf230_local *lp,150 unsigned int addr, unsigned int *data)151{152 bool sleep = lp->sleep;153 int ret;154 155 /* awake for register setting if sleep */156 if (sleep)157 at86rf230_awake(lp);158 159 ret = regmap_read(lp->regmap, addr, data);160 161 /* sleep again if was sleeping */162 if (sleep)163 at86rf230_sleep(lp);164 165 return ret;166}167 168static inline int169at86rf230_read_subreg(struct at86rf230_local *lp,170 unsigned int addr, unsigned int mask,171 unsigned int shift, unsigned int *data)172{173 int rc;174 175 rc = __at86rf230_read(lp, addr, data);176 if (!rc)177 *data = (*data & mask) >> shift;178 179 return rc;180}181 182static inline int183at86rf230_write_subreg(struct at86rf230_local *lp,184 unsigned int addr, unsigned int mask,185 unsigned int shift, unsigned int data)186{187 bool sleep = lp->sleep;188 int ret;189 190 /* awake for register setting if sleep */191 if (sleep)192 at86rf230_awake(lp);193 194 ret = regmap_update_bits(lp->regmap, addr, mask, data << shift);195 196 /* sleep again if was sleeping */197 if (sleep)198 at86rf230_sleep(lp);199 200 return ret;201}202 203static inline void204at86rf230_slp_tr_rising_edge(struct at86rf230_local *lp)205{206 gpiod_set_value(lp->slp_tr, 1);207 udelay(1);208 gpiod_set_value(lp->slp_tr, 0);209}210 211static bool212at86rf230_reg_writeable(struct device *dev, unsigned int reg)213{214 switch (reg) {215 case RG_TRX_STATE:216 case RG_TRX_CTRL_0:217 case RG_TRX_CTRL_1:218 case RG_PHY_TX_PWR:219 case RG_PHY_ED_LEVEL:220 case RG_PHY_CC_CCA:221 case RG_CCA_THRES:222 case RG_RX_CTRL:223 case RG_SFD_VALUE:224 case RG_TRX_CTRL_2:225 case RG_ANT_DIV:226 case RG_IRQ_MASK:227 case RG_VREG_CTRL:228 case RG_BATMON:229 case RG_XOSC_CTRL:230 case RG_RX_SYN:231 case RG_XAH_CTRL_1:232 case RG_FTN_CTRL:233 case RG_PLL_CF:234 case RG_PLL_DCU:235 case RG_SHORT_ADDR_0:236 case RG_SHORT_ADDR_1:237 case RG_PAN_ID_0:238 case RG_PAN_ID_1:239 case RG_IEEE_ADDR_0:240 case RG_IEEE_ADDR_1:241 case RG_IEEE_ADDR_2:242 case RG_IEEE_ADDR_3:243 case RG_IEEE_ADDR_4:244 case RG_IEEE_ADDR_5:245 case RG_IEEE_ADDR_6:246 case RG_IEEE_ADDR_7:247 case RG_XAH_CTRL_0:248 case RG_CSMA_SEED_0:249 case RG_CSMA_SEED_1:250 case RG_CSMA_BE:251 return true;252 default:253 return false;254 }255}256 257static bool258at86rf230_reg_readable(struct device *dev, unsigned int reg)259{260 bool rc;261 262 /* all writeable are also readable */263 rc = at86rf230_reg_writeable(dev, reg);264 if (rc)265 return rc;266 267 /* readonly regs */268 switch (reg) {269 case RG_TRX_STATUS:270 case RG_PHY_RSSI:271 case RG_IRQ_STATUS:272 case RG_PART_NUM:273 case RG_VERSION_NUM:274 case RG_MAN_ID_1:275 case RG_MAN_ID_0:276 return true;277 default:278 return false;279 }280}281 282static bool283at86rf230_reg_volatile(struct device *dev, unsigned int reg)284{285 /* can be changed during runtime */286 switch (reg) {287 case RG_TRX_STATUS:288 case RG_TRX_STATE:289 case RG_PHY_RSSI:290 case RG_PHY_ED_LEVEL:291 case RG_IRQ_STATUS:292 case RG_VREG_CTRL:293 case RG_PLL_CF:294 case RG_PLL_DCU:295 return true;296 default:297 return false;298 }299}300 301static bool302at86rf230_reg_precious(struct device *dev, unsigned int reg)303{304 /* don't clear irq line on read */305 switch (reg) {306 case RG_IRQ_STATUS:307 return true;308 default:309 return false;310 }311}312 313static const struct regmap_config at86rf230_regmap_spi_config = {314 .reg_bits = 8,315 .val_bits = 8,316 .write_flag_mask = CMD_REG | CMD_WRITE,317 .read_flag_mask = CMD_REG,318 .cache_type = REGCACHE_MAPLE,319 .max_register = AT86RF2XX_NUMREGS,320 .writeable_reg = at86rf230_reg_writeable,321 .readable_reg = at86rf230_reg_readable,322 .volatile_reg = at86rf230_reg_volatile,323 .precious_reg = at86rf230_reg_precious,324};325 326static void327at86rf230_async_error_recover_complete(void *context)328{329 struct at86rf230_state_change *ctx = context;330 struct at86rf230_local *lp = ctx->lp;331 332 if (ctx->free)333 kfree(ctx);334 335 if (lp->was_tx) {336 lp->was_tx = 0;337 ieee802154_xmit_hw_error(lp->hw, lp->tx_skb);338 }339}340 341static void342at86rf230_async_error_recover(void *context)343{344 struct at86rf230_state_change *ctx = context;345 struct at86rf230_local *lp = ctx->lp;346 347 if (lp->is_tx) {348 lp->was_tx = 1;349 lp->is_tx = 0;350 }351 352 at86rf230_async_state_change(lp, ctx, STATE_RX_AACK_ON,353 at86rf230_async_error_recover_complete);354}355 356static inline void357at86rf230_async_error(struct at86rf230_local *lp,358 struct at86rf230_state_change *ctx, int rc)359{360 dev_err(&lp->spi->dev, "spi_async error %d\n", rc);361 362 at86rf230_async_state_change(lp, ctx, STATE_FORCE_TRX_OFF,363 at86rf230_async_error_recover);364}365 366/* Generic function to get some register value in async mode */367static void368at86rf230_async_read_reg(struct at86rf230_local *lp, u8 reg,369 struct at86rf230_state_change *ctx,370 void (*complete)(void *context))371{372 int rc;373 374 u8 *tx_buf = ctx->buf;375 376 tx_buf[0] = (reg & CMD_REG_MASK) | CMD_REG;377 ctx->msg.complete = complete;378 rc = spi_async(lp->spi, &ctx->msg);379 if (rc)380 at86rf230_async_error(lp, ctx, rc);381}382 383static void384at86rf230_async_write_reg(struct at86rf230_local *lp, u8 reg, u8 val,385 struct at86rf230_state_change *ctx,386 void (*complete)(void *context))387{388 int rc;389 390 ctx->buf[0] = (reg & CMD_REG_MASK) | CMD_REG | CMD_WRITE;391 ctx->buf[1] = val;392 ctx->msg.complete = complete;393 rc = spi_async(lp->spi, &ctx->msg);394 if (rc)395 at86rf230_async_error(lp, ctx, rc);396}397 398static void399at86rf230_async_state_assert(void *context)400{401 struct at86rf230_state_change *ctx = context;402 struct at86rf230_local *lp = ctx->lp;403 const u8 *buf = ctx->buf;404 const u8 trx_state = buf[1] & TRX_STATE_MASK;405 406 /* Assert state change */407 if (trx_state != ctx->to_state) {408 /* Special handling if transceiver state is in409 * STATE_BUSY_RX_AACK and a SHR was detected.410 */411 if (trx_state == STATE_BUSY_RX_AACK) {412 /* Undocumented race condition. If we send a state413 * change to STATE_RX_AACK_ON the transceiver could414 * change his state automatically to STATE_BUSY_RX_AACK415 * if a SHR was detected. This is not an error, but we416 * can't assert this.417 */418 if (ctx->to_state == STATE_RX_AACK_ON)419 goto done;420 421 /* If we change to STATE_TX_ON without forcing and422 * transceiver state is STATE_BUSY_RX_AACK, we wait423 * 'tFrame + tPAck' receiving time. In this time the424 * PDU should be received. If the transceiver is still425 * in STATE_BUSY_RX_AACK, we run a force state change426 * to STATE_TX_ON. This is a timeout handling, if the427 * transceiver stucks in STATE_BUSY_RX_AACK.428 *429 * Additional we do several retries to try to get into430 * TX_ON state without forcing. If the retries are431 * higher or equal than AT86RF2XX_MAX_TX_RETRIES we432 * will do a force change.433 */434 if (ctx->to_state == STATE_TX_ON ||435 ctx->to_state == STATE_TRX_OFF) {436 u8 state = ctx->to_state;437 438 if (lp->tx_retry >= AT86RF2XX_MAX_TX_RETRIES)439 state = STATE_FORCE_TRX_OFF;440 lp->tx_retry++;441 442 at86rf230_async_state_change(lp, ctx, state,443 ctx->complete);444 return;445 }446 }447 448 dev_warn(&lp->spi->dev, "unexcept state change from 0x%02x to 0x%02x. Actual state: 0x%02x\n",449 ctx->from_state, ctx->to_state, trx_state);450 }451 452done:453 if (ctx->complete)454 ctx->complete(context);455}456 457static enum hrtimer_restart at86rf230_async_state_timer(struct hrtimer *timer)458{459 struct at86rf230_state_change *ctx =460 container_of(timer, struct at86rf230_state_change, timer);461 struct at86rf230_local *lp = ctx->lp;462 463 at86rf230_async_read_reg(lp, RG_TRX_STATUS, ctx,464 at86rf230_async_state_assert);465 466 return HRTIMER_NORESTART;467}468 469/* Do state change timing delay. */470static void471at86rf230_async_state_delay(void *context)472{473 struct at86rf230_state_change *ctx = context;474 struct at86rf230_local *lp = ctx->lp;475 struct at86rf2xx_chip_data *c = lp->data;476 bool force = false;477 ktime_t tim;478 479 /* The force state changes are will show as normal states in the480 * state status subregister. We change the to_state to the481 * corresponding one and remember if it was a force change, this482 * differs if we do a state change from STATE_BUSY_RX_AACK.483 */484 switch (ctx->to_state) {485 case STATE_FORCE_TX_ON:486 ctx->to_state = STATE_TX_ON;487 force = true;488 break;489 case STATE_FORCE_TRX_OFF:490 ctx->to_state = STATE_TRX_OFF;491 force = true;492 break;493 default:494 break;495 }496 497 switch (ctx->from_state) {498 case STATE_TRX_OFF:499 switch (ctx->to_state) {500 case STATE_RX_AACK_ON:501 tim = c->t_off_to_aack * NSEC_PER_USEC;502 /* state change from TRX_OFF to RX_AACK_ON to do a503 * calibration, we need to reset the timeout for the504 * next one.505 */506 lp->cal_timeout = jiffies + AT86RF2XX_CAL_LOOP_TIMEOUT;507 goto change;508 case STATE_TX_ARET_ON:509 case STATE_TX_ON:510 tim = c->t_off_to_tx_on * NSEC_PER_USEC;511 /* state change from TRX_OFF to TX_ON or ARET_ON to do512 * a calibration, we need to reset the timeout for the513 * next one.514 */515 lp->cal_timeout = jiffies + AT86RF2XX_CAL_LOOP_TIMEOUT;516 goto change;517 default:518 break;519 }520 break;521 case STATE_BUSY_RX_AACK:522 switch (ctx->to_state) {523 case STATE_TRX_OFF:524 case STATE_TX_ON:525 /* Wait for worst case receiving time if we526 * didn't make a force change from BUSY_RX_AACK527 * to TX_ON or TRX_OFF.528 */529 if (!force) {530 tim = (c->t_frame + c->t_p_ack) * NSEC_PER_USEC;531 goto change;532 }533 break;534 default:535 break;536 }537 break;538 /* Default value, means RESET state */539 case STATE_P_ON:540 switch (ctx->to_state) {541 case STATE_TRX_OFF:542 tim = c->t_reset_to_off * NSEC_PER_USEC;543 goto change;544 default:545 break;546 }547 break;548 default:549 break;550 }551 552 /* Default delay is 1us in the most cases */553 udelay(1);554 at86rf230_async_state_timer(&ctx->timer);555 return;556 557change:558 hrtimer_start(&ctx->timer, tim, HRTIMER_MODE_REL);559}560 561static void562at86rf230_async_state_change_start(void *context)563{564 struct at86rf230_state_change *ctx = context;565 struct at86rf230_local *lp = ctx->lp;566 u8 *buf = ctx->buf;567 const u8 trx_state = buf[1] & TRX_STATE_MASK;568 569 /* Check for "possible" STATE_TRANSITION_IN_PROGRESS */570 if (trx_state == STATE_TRANSITION_IN_PROGRESS) {571 udelay(1);572 at86rf230_async_read_reg(lp, RG_TRX_STATUS, ctx,573 at86rf230_async_state_change_start);574 return;575 }576 577 /* Check if we already are in the state which we change in */578 if (trx_state == ctx->to_state) {579 if (ctx->complete)580 ctx->complete(context);581 return;582 }583 584 /* Set current state to the context of state change */585 ctx->from_state = trx_state;586 587 /* Going into the next step for a state change which do a timing588 * relevant delay.589 */590 at86rf230_async_write_reg(lp, RG_TRX_STATE, ctx->to_state, ctx,591 at86rf230_async_state_delay);592}593 594static void595at86rf230_async_state_change(struct at86rf230_local *lp,596 struct at86rf230_state_change *ctx,597 const u8 state, void (*complete)(void *context))598{599 /* Initialization for the state change context */600 ctx->to_state = state;601 ctx->complete = complete;602 at86rf230_async_read_reg(lp, RG_TRX_STATUS, ctx,603 at86rf230_async_state_change_start);604}605 606static void607at86rf230_sync_state_change_complete(void *context)608{609 struct at86rf230_state_change *ctx = context;610 struct at86rf230_local *lp = ctx->lp;611 612 complete(&lp->state_complete);613}614 615/* This function do a sync framework above the async state change.616 * Some callbacks of the IEEE 802.15.4 driver interface need to be617 * handled synchronously.618 */619static int620at86rf230_sync_state_change(struct at86rf230_local *lp, unsigned int state)621{622 unsigned long rc;623 624 at86rf230_async_state_change(lp, &lp->state, state,625 at86rf230_sync_state_change_complete);626 627 rc = wait_for_completion_timeout(&lp->state_complete,628 msecs_to_jiffies(100));629 if (!rc) {630 at86rf230_async_error(lp, &lp->state, -ETIMEDOUT);631 return -ETIMEDOUT;632 }633 634 return 0;635}636 637static void638at86rf230_tx_complete(void *context)639{640 struct at86rf230_state_change *ctx = context;641 struct at86rf230_local *lp = ctx->lp;642 643 if (ctx->trac == IEEE802154_SUCCESS)644 ieee802154_xmit_complete(lp->hw, lp->tx_skb, false);645 else646 ieee802154_xmit_error(lp->hw, lp->tx_skb, ctx->trac);647 648 kfree(ctx);649}650 651static void652at86rf230_tx_on(void *context)653{654 struct at86rf230_state_change *ctx = context;655 struct at86rf230_local *lp = ctx->lp;656 657 at86rf230_async_state_change(lp, ctx, STATE_RX_AACK_ON,658 at86rf230_tx_complete);659}660 661static void662at86rf230_tx_trac_check(void *context)663{664 struct at86rf230_state_change *ctx = context;665 struct at86rf230_local *lp = ctx->lp;666 u8 trac = TRAC_MASK(ctx->buf[1]);667 668 switch (trac) {669 case TRAC_SUCCESS:670 case TRAC_SUCCESS_DATA_PENDING:671 ctx->trac = IEEE802154_SUCCESS;672 break;673 case TRAC_CHANNEL_ACCESS_FAILURE:674 ctx->trac = IEEE802154_CHANNEL_ACCESS_FAILURE;675 break;676 case TRAC_NO_ACK:677 ctx->trac = IEEE802154_NO_ACK;678 break;679 default:680 ctx->trac = IEEE802154_SYSTEM_ERROR;681 }682 683 at86rf230_async_state_change(lp, ctx, STATE_TX_ON, at86rf230_tx_on);684}685 686static void687at86rf230_rx_read_frame_complete(void *context)688{689 struct at86rf230_state_change *ctx = context;690 struct at86rf230_local *lp = ctx->lp;691 const u8 *buf = ctx->buf;692 struct sk_buff *skb;693 u8 len, lqi;694 695 len = buf[1];696 if (!ieee802154_is_valid_psdu_len(len)) {697 dev_vdbg(&lp->spi->dev, "corrupted frame received\n");698 len = IEEE802154_MTU;699 }700 lqi = buf[2 + len];701 702 skb = dev_alloc_skb(IEEE802154_MTU);703 if (!skb) {704 dev_vdbg(&lp->spi->dev, "failed to allocate sk_buff\n");705 kfree(ctx);706 return;707 }708 709 skb_put_data(skb, buf + 2, len);710 ieee802154_rx_irqsafe(lp->hw, skb, lqi);711 kfree(ctx);712}713 714static void715at86rf230_rx_trac_check(void *context)716{717 struct at86rf230_state_change *ctx = context;718 struct at86rf230_local *lp = ctx->lp;719 u8 *buf = ctx->buf;720 int rc;721 722 buf[0] = CMD_FB;723 ctx->trx.len = AT86RF2XX_MAX_BUF;724 ctx->msg.complete = at86rf230_rx_read_frame_complete;725 rc = spi_async(lp->spi, &ctx->msg);726 if (rc) {727 ctx->trx.len = 2;728 at86rf230_async_error(lp, ctx, rc);729 }730}731 732static void733at86rf230_irq_trx_end(void *context)734{735 struct at86rf230_state_change *ctx = context;736 struct at86rf230_local *lp = ctx->lp;737 738 if (lp->is_tx) {739 lp->is_tx = 0;740 at86rf230_async_read_reg(lp, RG_TRX_STATE, ctx,741 at86rf230_tx_trac_check);742 } else {743 at86rf230_async_read_reg(lp, RG_TRX_STATE, ctx,744 at86rf230_rx_trac_check);745 }746}747 748static void749at86rf230_irq_status(void *context)750{751 struct at86rf230_state_change *ctx = context;752 struct at86rf230_local *lp = ctx->lp;753 const u8 *buf = ctx->buf;754 u8 irq = buf[1];755 756 enable_irq(lp->spi->irq);757 758 if (irq & IRQ_TRX_END) {759 at86rf230_irq_trx_end(ctx);760 } else {761 dev_err(&lp->spi->dev, "not supported irq %02x received\n",762 irq);763 kfree(ctx);764 }765}766 767static void768at86rf230_setup_spi_messages(struct at86rf230_local *lp,769 struct at86rf230_state_change *state)770{771 state->lp = lp;772 state->irq = lp->spi->irq;773 spi_message_init(&state->msg);774 state->msg.context = state;775 state->trx.len = 2;776 state->trx.tx_buf = state->buf;777 state->trx.rx_buf = state->buf;778 spi_message_add_tail(&state->trx, &state->msg);779 hrtimer_init(&state->timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);780 state->timer.function = at86rf230_async_state_timer;781}782 783static irqreturn_t at86rf230_isr(int irq, void *data)784{785 struct at86rf230_local *lp = data;786 struct at86rf230_state_change *ctx;787 int rc;788 789 disable_irq_nosync(irq);790 791 ctx = kzalloc(sizeof(*ctx), GFP_ATOMIC);792 if (!ctx) {793 enable_irq(irq);794 return IRQ_NONE;795 }796 797 at86rf230_setup_spi_messages(lp, ctx);798 /* tell on error handling to free ctx */799 ctx->free = true;800 801 ctx->buf[0] = (RG_IRQ_STATUS & CMD_REG_MASK) | CMD_REG;802 ctx->msg.complete = at86rf230_irq_status;803 rc = spi_async(lp->spi, &ctx->msg);804 if (rc) {805 at86rf230_async_error(lp, ctx, rc);806 enable_irq(irq);807 return IRQ_NONE;808 }809 810 return IRQ_HANDLED;811}812 813static void814at86rf230_write_frame_complete(void *context)815{816 struct at86rf230_state_change *ctx = context;817 struct at86rf230_local *lp = ctx->lp;818 819 ctx->trx.len = 2;820 821 if (lp->slp_tr)822 at86rf230_slp_tr_rising_edge(lp);823 else824 at86rf230_async_write_reg(lp, RG_TRX_STATE, STATE_BUSY_TX, ctx,825 NULL);826}827 828static void829at86rf230_write_frame(void *context)830{831 struct at86rf230_state_change *ctx = context;832 struct at86rf230_local *lp = ctx->lp;833 struct sk_buff *skb = lp->tx_skb;834 u8 *buf = ctx->buf;835 int rc;836 837 lp->is_tx = 1;838 839 buf[0] = CMD_FB | CMD_WRITE;840 buf[1] = skb->len + 2;841 memcpy(buf + 2, skb->data, skb->len);842 ctx->trx.len = skb->len + 2;843 ctx->msg.complete = at86rf230_write_frame_complete;844 rc = spi_async(lp->spi, &ctx->msg);845 if (rc) {846 ctx->trx.len = 2;847 at86rf230_async_error(lp, ctx, rc);848 }849}850 851static void852at86rf230_xmit_tx_on(void *context)853{854 struct at86rf230_state_change *ctx = context;855 struct at86rf230_local *lp = ctx->lp;856 857 at86rf230_async_state_change(lp, ctx, STATE_TX_ARET_ON,858 at86rf230_write_frame);859}860 861static void862at86rf230_xmit_start(void *context)863{864 struct at86rf230_state_change *ctx = context;865 struct at86rf230_local *lp = ctx->lp;866 867 /* check if we change from off state */868 if (lp->is_tx_from_off)869 at86rf230_async_state_change(lp, ctx, STATE_TX_ARET_ON,870 at86rf230_write_frame);871 else872 at86rf230_async_state_change(lp, ctx, STATE_TX_ON,873 at86rf230_xmit_tx_on);874}875 876static int877at86rf230_xmit(struct ieee802154_hw *hw, struct sk_buff *skb)878{879 struct at86rf230_local *lp = hw->priv;880 struct at86rf230_state_change *ctx = &lp->tx;881 882 lp->tx_skb = skb;883 lp->tx_retry = 0;884 885 /* After 5 minutes in PLL and the same frequency we run again the886 * calibration loops which is recommended by at86rf2xx datasheets.887 *888 * The calibration is initiate by a state change from TRX_OFF889 * to TX_ON, the lp->cal_timeout should be reinit by state_delay890 * function then to start in the next 5 minutes.891 */892 if (time_is_before_jiffies(lp->cal_timeout)) {893 lp->is_tx_from_off = true;894 at86rf230_async_state_change(lp, ctx, STATE_TRX_OFF,895 at86rf230_xmit_start);896 } else {897 lp->is_tx_from_off = false;898 at86rf230_xmit_start(ctx);899 }900 901 return 0;902}903 904static int905at86rf230_ed(struct ieee802154_hw *hw, u8 *level)906{907 WARN_ON(!level);908 *level = 0xbe;909 return 0;910}911 912static int913at86rf230_start(struct ieee802154_hw *hw)914{915 struct at86rf230_local *lp = hw->priv;916 917 at86rf230_awake(lp);918 enable_irq(lp->spi->irq);919 920 return at86rf230_sync_state_change(lp, STATE_RX_AACK_ON);921}922 923static void924at86rf230_stop(struct ieee802154_hw *hw)925{926 struct at86rf230_local *lp = hw->priv;927 u8 csma_seed[2];928 929 at86rf230_sync_state_change(lp, STATE_FORCE_TRX_OFF);930 931 disable_irq(lp->spi->irq);932 933 /* It's recommended to set random new csma_seeds before sleep state.934 * Makes only sense in the stop callback, not doing this inside of935 * at86rf230_sleep, this is also used when we don't transmit afterwards936 * when calling start callback again.937 */938 get_random_bytes(csma_seed, ARRAY_SIZE(csma_seed));939 at86rf230_write_subreg(lp, SR_CSMA_SEED_0, csma_seed[0]);940 at86rf230_write_subreg(lp, SR_CSMA_SEED_1, csma_seed[1]);941 942 at86rf230_sleep(lp);943}944 945static int946at86rf23x_set_channel(struct at86rf230_local *lp, u8 page, u8 channel)947{948 return at86rf230_write_subreg(lp, SR_CHANNEL, channel);949}950 951#define AT86RF2XX_MAX_ED_LEVELS 0xF952static const s32 at86rf233_ed_levels[AT86RF2XX_MAX_ED_LEVELS + 1] = {953 -9400, -9200, -9000, -8800, -8600, -8400, -8200, -8000, -7800, -7600,954 -7400, -7200, -7000, -6800, -6600, -6400,955};956 957static const s32 at86rf231_ed_levels[AT86RF2XX_MAX_ED_LEVELS + 1] = {958 -9100, -8900, -8700, -8500, -8300, -8100, -7900, -7700, -7500, -7300,959 -7100, -6900, -6700, -6500, -6300, -6100,960};961 962static const s32 at86rf212_ed_levels_100[AT86RF2XX_MAX_ED_LEVELS + 1] = {963 -10000, -9800, -9600, -9400, -9200, -9000, -8800, -8600, -8400, -8200,964 -8000, -7800, -7600, -7400, -7200, -7000,965};966 967static const s32 at86rf212_ed_levels_98[AT86RF2XX_MAX_ED_LEVELS + 1] = {968 -9800, -9600, -9400, -9200, -9000, -8800, -8600, -8400, -8200, -8000,969 -7800, -7600, -7400, -7200, -7000, -6800,970};971 972static inline int973at86rf212_update_cca_ed_level(struct at86rf230_local *lp, int rssi_base_val)974{975 unsigned int cca_ed_thres;976 int rc;977 978 rc = at86rf230_read_subreg(lp, SR_CCA_ED_THRES, &cca_ed_thres);979 if (rc < 0)980 return rc;981 982 switch (rssi_base_val) {983 case -98:984 lp->hw->phy->supported.cca_ed_levels = at86rf212_ed_levels_98;985 lp->hw->phy->supported.cca_ed_levels_size = ARRAY_SIZE(at86rf212_ed_levels_98);986 lp->hw->phy->cca_ed_level = at86rf212_ed_levels_98[cca_ed_thres];987 break;988 case -100:989 lp->hw->phy->supported.cca_ed_levels = at86rf212_ed_levels_100;990 lp->hw->phy->supported.cca_ed_levels_size = ARRAY_SIZE(at86rf212_ed_levels_100);991 lp->hw->phy->cca_ed_level = at86rf212_ed_levels_100[cca_ed_thres];992 break;993 default:994 WARN_ON(1);995 }996 997 return 0;998}999 1000static int1001at86rf212_set_channel(struct at86rf230_local *lp, u8 page, u8 channel)1002{1003 int rc;1004 1005 if (channel == 0)1006 rc = at86rf230_write_subreg(lp, SR_SUB_MODE, 0);1007 else1008 rc = at86rf230_write_subreg(lp, SR_SUB_MODE, 1);1009 if (rc < 0)1010 return rc;1011 1012 if (page == 0) {1013 rc = at86rf230_write_subreg(lp, SR_BPSK_QPSK, 0);1014 lp->data->rssi_base_val = -100;1015 } else {1016 rc = at86rf230_write_subreg(lp, SR_BPSK_QPSK, 1);1017 lp->data->rssi_base_val = -98;1018 }1019 if (rc < 0)1020 return rc;1021 1022 rc = at86rf212_update_cca_ed_level(lp, lp->data->rssi_base_val);1023 if (rc < 0)1024 return rc;1025 1026 return at86rf230_write_subreg(lp, SR_CHANNEL, channel);1027}1028 1029static int1030at86rf230_channel(struct ieee802154_hw *hw, u8 page, u8 channel)1031{1032 struct at86rf230_local *lp = hw->priv;1033 int rc;1034 1035 rc = lp->data->set_channel(lp, page, channel);1036 /* Wait for PLL */1037 usleep_range(lp->data->t_channel_switch,1038 lp->data->t_channel_switch + 10);1039 1040 lp->cal_timeout = jiffies + AT86RF2XX_CAL_LOOP_TIMEOUT;1041 return rc;1042}1043 1044static int1045at86rf230_set_hw_addr_filt(struct ieee802154_hw *hw,1046 struct ieee802154_hw_addr_filt *filt,1047 unsigned long changed)1048{1049 struct at86rf230_local *lp = hw->priv;1050 1051 if (changed & IEEE802154_AFILT_SADDR_CHANGED) {1052 u16 addr = le16_to_cpu(filt->short_addr);1053 1054 dev_vdbg(&lp->spi->dev, "%s called for saddr\n", __func__);1055 __at86rf230_write(lp, RG_SHORT_ADDR_0, addr);1056 __at86rf230_write(lp, RG_SHORT_ADDR_1, addr >> 8);1057 }1058 1059 if (changed & IEEE802154_AFILT_PANID_CHANGED) {1060 u16 pan = le16_to_cpu(filt->pan_id);1061 1062 dev_vdbg(&lp->spi->dev, "%s called for pan id\n", __func__);1063 __at86rf230_write(lp, RG_PAN_ID_0, pan);1064 __at86rf230_write(lp, RG_PAN_ID_1, pan >> 8);1065 }1066 1067 if (changed & IEEE802154_AFILT_IEEEADDR_CHANGED) {1068 u8 i, addr[8];1069 1070 memcpy(addr, &filt->ieee_addr, 8);1071 dev_vdbg(&lp->spi->dev, "%s called for IEEE addr\n", __func__);1072 for (i = 0; i < 8; i++)1073 __at86rf230_write(lp, RG_IEEE_ADDR_0 + i, addr[i]);1074 }1075 1076 if (changed & IEEE802154_AFILT_PANC_CHANGED) {1077 dev_vdbg(&lp->spi->dev, "%s called for panc change\n", __func__);1078 if (filt->pan_coord)1079 at86rf230_write_subreg(lp, SR_AACK_I_AM_COORD, 1);1080 else1081 at86rf230_write_subreg(lp, SR_AACK_I_AM_COORD, 0);1082 }1083 1084 return 0;1085}1086 1087#define AT86RF23X_MAX_TX_POWERS 0xF1088static const s32 at86rf233_powers[AT86RF23X_MAX_TX_POWERS + 1] = {1089 400, 370, 340, 300, 250, 200, 100, 0, -100, -200, -300, -400, -600,1090 -800, -1200, -1700,1091};1092 1093static const s32 at86rf231_powers[AT86RF23X_MAX_TX_POWERS + 1] = {1094 300, 280, 230, 180, 130, 70, 0, -100, -200, -300, -400, -500, -700,1095 -900, -1200, -1700,1096};1097 1098#define AT86RF212_MAX_TX_POWERS 0x1F1099static const s32 at86rf212_powers[AT86RF212_MAX_TX_POWERS + 1] = {1100 500, 400, 300, 200, 100, 0, -100, -200, -300, -400, -500, -600, -700,1101 -800, -900, -1000, -1100, -1200, -1300, -1400, -1500, -1600, -1700,1102 -1800, -1900, -2000, -2100, -2200, -2300, -2400, -2500, -2600,1103};1104 1105static int1106at86rf23x_set_txpower(struct at86rf230_local *lp, s32 mbm)1107{1108 u32 i;1109 1110 for (i = 0; i < lp->hw->phy->supported.tx_powers_size; i++) {1111 if (lp->hw->phy->supported.tx_powers[i] == mbm)1112 return at86rf230_write_subreg(lp, SR_TX_PWR_23X, i);1113 }1114 1115 return -EINVAL;1116}1117 1118static int1119at86rf212_set_txpower(struct at86rf230_local *lp, s32 mbm)1120{1121 u32 i;1122 1123 for (i = 0; i < lp->hw->phy->supported.tx_powers_size; i++) {1124 if (lp->hw->phy->supported.tx_powers[i] == mbm)1125 return at86rf230_write_subreg(lp, SR_TX_PWR_212, i);1126 }1127 1128 return -EINVAL;1129}1130 1131static int1132at86rf230_set_txpower(struct ieee802154_hw *hw, s32 mbm)1133{1134 struct at86rf230_local *lp = hw->priv;1135 1136 return lp->data->set_txpower(lp, mbm);1137}1138 1139static int1140at86rf230_set_lbt(struct ieee802154_hw *hw, bool on)1141{1142 struct at86rf230_local *lp = hw->priv;1143 1144 return at86rf230_write_subreg(lp, SR_CSMA_LBT_MODE, on);1145}1146 1147static int1148at86rf230_set_cca_mode(struct ieee802154_hw *hw,1149 const struct wpan_phy_cca *cca)1150{1151 struct at86rf230_local *lp = hw->priv;1152 u8 val;1153 1154 /* mapping 802.15.4 to driver spec */1155 switch (cca->mode) {1156 case NL802154_CCA_ENERGY:1157 val = 1;1158 break;1159 case NL802154_CCA_CARRIER:1160 val = 2;1161 break;1162 case NL802154_CCA_ENERGY_CARRIER:1163 switch (cca->opt) {1164 case NL802154_CCA_OPT_ENERGY_CARRIER_AND:1165 val = 3;1166 break;1167 case NL802154_CCA_OPT_ENERGY_CARRIER_OR:1168 val = 0;1169 break;1170 default:1171 return -EINVAL;1172 }1173 break;1174 default:1175 return -EINVAL;1176 }1177 1178 return at86rf230_write_subreg(lp, SR_CCA_MODE, val);1179}1180 1181static int1182at86rf230_set_cca_ed_level(struct ieee802154_hw *hw, s32 mbm)1183{1184 struct at86rf230_local *lp = hw->priv;1185 u32 i;1186 1187 for (i = 0; i < hw->phy->supported.cca_ed_levels_size; i++) {1188 if (hw->phy->supported.cca_ed_levels[i] == mbm)1189 return at86rf230_write_subreg(lp, SR_CCA_ED_THRES, i);1190 }1191 1192 return -EINVAL;1193}1194 1195static int1196at86rf230_set_csma_params(struct ieee802154_hw *hw, u8 min_be, u8 max_be,1197 u8 retries)1198{1199 struct at86rf230_local *lp = hw->priv;1200 int rc;1201 1202 rc = at86rf230_write_subreg(lp, SR_MIN_BE, min_be);1203 if (rc)1204 return rc;1205 1206 rc = at86rf230_write_subreg(lp, SR_MAX_BE, max_be);1207 if (rc)1208 return rc;1209 1210 return at86rf230_write_subreg(lp, SR_MAX_CSMA_RETRIES, retries);1211}1212 1213static int1214at86rf230_set_frame_retries(struct ieee802154_hw *hw, s8 retries)1215{1216 struct at86rf230_local *lp = hw->priv;1217 1218 return at86rf230_write_subreg(lp, SR_MAX_FRAME_RETRIES, retries);1219}1220 1221static int1222at86rf230_set_promiscuous_mode(struct ieee802154_hw *hw, const bool on)1223{1224 struct at86rf230_local *lp = hw->priv;1225 int rc;1226 1227 if (on) {1228 rc = at86rf230_write_subreg(lp, SR_AACK_DIS_ACK, 1);1229 if (rc < 0)1230 return rc;1231 1232 rc = at86rf230_write_subreg(lp, SR_AACK_PROM_MODE, 1);1233 if (rc < 0)1234 return rc;1235 } else {1236 rc = at86rf230_write_subreg(lp, SR_AACK_PROM_MODE, 0);1237 if (rc < 0)1238 return rc;1239 1240 rc = at86rf230_write_subreg(lp, SR_AACK_DIS_ACK, 0);1241 if (rc < 0)1242 return rc;1243 }1244 1245 return 0;1246}1247 1248static const struct ieee802154_ops at86rf230_ops = {1249 .owner = THIS_MODULE,1250 .xmit_async = at86rf230_xmit,1251 .ed = at86rf230_ed,1252 .set_channel = at86rf230_channel,1253 .start = at86rf230_start,1254 .stop = at86rf230_stop,1255 .set_hw_addr_filt = at86rf230_set_hw_addr_filt,1256 .set_txpower = at86rf230_set_txpower,1257 .set_lbt = at86rf230_set_lbt,1258 .set_cca_mode = at86rf230_set_cca_mode,1259 .set_cca_ed_level = at86rf230_set_cca_ed_level,1260 .set_csma_params = at86rf230_set_csma_params,1261 .set_frame_retries = at86rf230_set_frame_retries,1262 .set_promiscuous_mode = at86rf230_set_promiscuous_mode,1263};1264 1265static struct at86rf2xx_chip_data at86rf233_data = {1266 .t_sleep_cycle = 330,1267 .t_channel_switch = 11,1268 .t_reset_to_off = 26,1269 .t_off_to_aack = 80,1270 .t_off_to_tx_on = 80,1271 .t_off_to_sleep = 35,1272 .t_sleep_to_off = 1000,1273 .t_frame = 4096,1274 .t_p_ack = 545,1275 .rssi_base_val = -94,1276 .set_channel = at86rf23x_set_channel,1277 .set_txpower = at86rf23x_set_txpower,1278};1279 1280static struct at86rf2xx_chip_data at86rf231_data = {1281 .t_sleep_cycle = 330,1282 .t_channel_switch = 24,1283 .t_reset_to_off = 37,1284 .t_off_to_aack = 110,1285 .t_off_to_tx_on = 110,1286 .t_off_to_sleep = 35,1287 .t_sleep_to_off = 1000,1288 .t_frame = 4096,1289 .t_p_ack = 545,1290 .rssi_base_val = -91,1291 .set_channel = at86rf23x_set_channel,1292 .set_txpower = at86rf23x_set_txpower,1293};1294 1295static struct at86rf2xx_chip_data at86rf212_data = {1296 .t_sleep_cycle = 330,1297 .t_channel_switch = 11,1298 .t_reset_to_off = 26,1299 .t_off_to_aack = 200,1300 .t_off_to_tx_on = 200,1301 .t_off_to_sleep = 35,1302 .t_sleep_to_off = 1000,1303 .t_frame = 4096,1304 .t_p_ack = 545,1305 .rssi_base_val = -100,1306 .set_channel = at86rf212_set_channel,1307 .set_txpower = at86rf212_set_txpower,1308};1309 1310static int at86rf230_hw_init(struct at86rf230_local *lp, u8 xtal_trim)1311{1312 int rc, irq_type, irq_pol = IRQ_ACTIVE_HIGH;1313 unsigned int dvdd;1314 u8 csma_seed[2];1315 1316 rc = at86rf230_sync_state_change(lp, STATE_FORCE_TRX_OFF);1317 if (rc)1318 return rc;1319 1320 irq_type = irq_get_trigger_type(lp->spi->irq);1321 if (irq_type == IRQ_TYPE_EDGE_FALLING ||1322 irq_type == IRQ_TYPE_LEVEL_LOW)1323 irq_pol = IRQ_ACTIVE_LOW;1324 1325 rc = at86rf230_write_subreg(lp, SR_IRQ_POLARITY, irq_pol);1326 if (rc)1327 return rc;1328 1329 rc = at86rf230_write_subreg(lp, SR_RX_SAFE_MODE, 1);1330 if (rc)1331 return rc;1332 1333 rc = at86rf230_write_subreg(lp, SR_IRQ_MASK, IRQ_TRX_END);1334 if (rc)1335 return rc;1336 1337 /* reset values differs in at86rf231 and at86rf233 */1338 rc = at86rf230_write_subreg(lp, SR_IRQ_MASK_MODE, 0);1339 if (rc)1340 return rc;1341 1342 get_random_bytes(csma_seed, ARRAY_SIZE(csma_seed));1343 rc = at86rf230_write_subreg(lp, SR_CSMA_SEED_0, csma_seed[0]);1344 if (rc)1345 return rc;1346 rc = at86rf230_write_subreg(lp, SR_CSMA_SEED_1, csma_seed[1]);1347 if (rc)1348 return rc;1349 1350 /* CLKM changes are applied immediately */1351 rc = at86rf230_write_subreg(lp, SR_CLKM_SHA_SEL, 0x00);1352 if (rc)1353 return rc;1354 1355 /* Turn CLKM Off */1356 rc = at86rf230_write_subreg(lp, SR_CLKM_CTRL, 0x00);1357 if (rc)1358 return rc;1359 /* Wait the next SLEEP cycle */1360 usleep_range(lp->data->t_sleep_cycle,1361 lp->data->t_sleep_cycle + 100);1362 1363 /* xtal_trim value is calculated by:1364 * CL = 0.5 * (CX + CTRIM + CPAR)1365 *1366 * whereas:1367 * CL = capacitor of used crystal1368 * CX = connected capacitors at xtal pins1369 * CPAR = in all at86rf2xx datasheets this is a constant value 3 pF,1370 * but this is different on each board setup. You need to fine1371 * tuning this value via CTRIM.1372 * CTRIM = variable capacitor setting. Resolution is 0.3 pF range is1373 * 0 pF upto 4.5 pF.1374 *1375 * Examples:1376 * atben transceiver:1377 *1378 * CL = 8 pF1379 * CX = 12 pF1380 * CPAR = 3 pF (We assume the magic constant from datasheet)1381 * CTRIM = 0.9 pF1382 *1383 * (12+0.9+3)/2 = 7.95 which is nearly at 8 pF1384 *1385 * xtal_trim = 0x31386 *1387 * openlabs transceiver:1388 *1389 * CL = 16 pF1390 * CX = 22 pF1391 * CPAR = 3 pF (We assume the magic constant from datasheet)1392 * CTRIM = 4.5 pF1393 *1394 * (22+4.5+3)/2 = 14.75 which is the nearest value to 16 pF1395 *1396 * xtal_trim = 0xf1397 */1398 rc = at86rf230_write_subreg(lp, SR_XTAL_TRIM, xtal_trim);1399 if (rc)1400 return rc;1401 1402 rc = at86rf230_read_subreg(lp, SR_DVDD_OK, &dvdd);1403 if (rc)1404 return rc;1405 if (!dvdd) {1406 dev_err(&lp->spi->dev, "DVDD error\n");1407 return -EINVAL;1408 }1409 1410 /* Force setting slotted operation bit to 0. Sometimes the atben1411 * sets this bit and I don't know why. We set this always force1412 * to zero while probing.1413 */1414 return at86rf230_write_subreg(lp, SR_SLOTTED_OPERATION, 0);1415}1416 1417static int1418at86rf230_detect_device(struct at86rf230_local *lp)1419{1420 unsigned int part, version, val;1421 u16 man_id = 0;1422 const char *chip;1423 int rc;1424 1425 rc = __at86rf230_read(lp, RG_MAN_ID_0, &val);1426 if (rc)1427 return rc;1428 man_id |= val;1429 1430 rc = __at86rf230_read(lp, RG_MAN_ID_1, &val);1431 if (rc)1432 return rc;1433 man_id |= (val << 8);1434 1435 rc = __at86rf230_read(lp, RG_PART_NUM, &part);1436 if (rc)1437 return rc;1438 1439 rc = __at86rf230_read(lp, RG_VERSION_NUM, &version);1440 if (rc)1441 return rc;1442 1443 if (man_id != 0x001f) {1444 dev_err(&lp->spi->dev, "Non-Atmel dev found (MAN_ID %02x %02x)\n",1445 man_id >> 8, man_id & 0xFF);1446 return -EINVAL;1447 }1448 1449 lp->hw->flags = IEEE802154_HW_TX_OMIT_CKSUM |1450 IEEE802154_HW_CSMA_PARAMS |1451 IEEE802154_HW_FRAME_RETRIES | IEEE802154_HW_AFILT |1452 IEEE802154_HW_PROMISCUOUS;1453 1454 lp->hw->phy->flags = WPAN_PHY_FLAG_TXPOWER |1455 WPAN_PHY_FLAG_CCA_ED_LEVEL |1456 WPAN_PHY_FLAG_CCA_MODE;1457 1458 lp->hw->phy->supported.cca_modes = BIT(NL802154_CCA_ENERGY) |1459 BIT(NL802154_CCA_CARRIER) | BIT(NL802154_CCA_ENERGY_CARRIER);1460 lp->hw->phy->supported.cca_opts = BIT(NL802154_CCA_OPT_ENERGY_CARRIER_AND) |1461 BIT(NL802154_CCA_OPT_ENERGY_CARRIER_OR);1462 1463 lp->hw->phy->cca.mode = NL802154_CCA_ENERGY;1464 1465 switch (part) {1466 case 2:1467 chip = "at86rf230";1468 rc = -ENOTSUPP;1469 goto not_supp;1470 case 3:1471 chip = "at86rf231";1472 lp->data = &at86rf231_data;1473 lp->hw->phy->supported.channels[0] = 0x7FFF800;1474 lp->hw->phy->current_channel = 11;1475 lp->hw->phy->supported.tx_powers = at86rf231_powers;1476 lp->hw->phy->supported.tx_powers_size = ARRAY_SIZE(at86rf231_powers);1477 lp->hw->phy->supported.cca_ed_levels = at86rf231_ed_levels;1478 lp->hw->phy->supported.cca_ed_levels_size = ARRAY_SIZE(at86rf231_ed_levels);1479 break;1480 case 7:1481 chip = "at86rf212";1482 lp->data = &at86rf212_data;1483 lp->hw->flags |= IEEE802154_HW_LBT;1484 lp->hw->phy->supported.channels[0] = 0x00007FF;1485 lp->hw->phy->supported.channels[2] = 0x00007FF;1486 lp->hw->phy->current_channel = 5;1487 lp->hw->phy->supported.lbt = NL802154_SUPPORTED_BOOL_BOTH;1488 lp->hw->phy->supported.tx_powers = at86rf212_powers;1489 lp->hw->phy->supported.tx_powers_size = ARRAY_SIZE(at86rf212_powers);1490 lp->hw->phy->supported.cca_ed_levels = at86rf212_ed_levels_100;1491 lp->hw->phy->supported.cca_ed_levels_size = ARRAY_SIZE(at86rf212_ed_levels_100);1492 break;1493 case 11:1494 chip = "at86rf233";1495 lp->data = &at86rf233_data;1496 lp->hw->phy->supported.channels[0] = 0x7FFF800;1497 lp->hw->phy->current_channel = 13;1498 lp->hw->phy->supported.tx_powers = at86rf233_powers;1499 lp->hw->phy->supported.tx_powers_size = ARRAY_SIZE(at86rf233_powers);1500 lp->hw->phy->supported.cca_ed_levels = at86rf233_ed_levels;1501 lp->hw->phy->supported.cca_ed_levels_size = ARRAY_SIZE(at86rf233_ed_levels);1502 break;1503 default:1504 chip = "unknown";1505 rc = -ENOTSUPP;1506 goto not_supp;1507 }1508 1509 lp->hw->phy->cca_ed_level = lp->hw->phy->supported.cca_ed_levels[7];1510 lp->hw->phy->transmit_power = lp->hw->phy->supported.tx_powers[0];1511 1512not_supp:1513 dev_info(&lp->spi->dev, "Detected %s chip version %d\n", chip, version);1514 1515 return rc;1516}1517 1518static int at86rf230_probe(struct spi_device *spi)1519{1520 struct ieee802154_hw *hw;1521 struct at86rf230_local *lp;1522 struct gpio_desc *slp_tr;1523 struct gpio_desc *rstn;1524 unsigned int status;1525 int rc, irq_type;1526 u8 xtal_trim;1527 1528 if (!spi->irq) {1529 dev_err(&spi->dev, "no IRQ specified\n");1530 return -EINVAL;1531 }1532 1533 rc = device_property_read_u8(&spi->dev, "xtal-trim", &xtal_trim);1534 if (rc < 0) {1535 if (rc != -EINVAL) {1536 dev_err(&spi->dev,1537 "failed to parse xtal-trim: %d\n", rc);1538 return rc;1539 }1540 xtal_trim = 0;1541 }1542 1543 rstn = devm_gpiod_get_optional(&spi->dev, "reset", GPIOD_OUT_LOW);1544 rc = PTR_ERR_OR_ZERO(rstn);1545 if (rc)1546 return rc;1547 1548 gpiod_set_consumer_name(rstn, "rstn");1549 1550 slp_tr = devm_gpiod_get_optional(&spi->dev, "sleep", GPIOD_OUT_LOW);1551 rc = PTR_ERR_OR_ZERO(slp_tr);1552 if (rc)1553 return rc;1554 1555 gpiod_set_consumer_name(slp_tr, "slp_tr");1556 1557 /* Reset */1558 if (rstn) {1559 udelay(1);1560 gpiod_set_value_cansleep(rstn, 1);1561 udelay(1);1562 gpiod_set_value_cansleep(rstn, 0);1563 usleep_range(120, 240);1564 }1565 1566 hw = ieee802154_alloc_hw(sizeof(*lp), &at86rf230_ops);1567 if (!hw)1568 return -ENOMEM;1569 1570 lp = hw->priv;1571 lp->hw = hw;1572 lp->spi = spi;1573 lp->slp_tr = slp_tr;1574 hw->parent = &spi->dev;1575 ieee802154_random_extended_addr(&hw->phy->perm_extended_addr);1576 1577 lp->regmap = devm_regmap_init_spi(spi, &at86rf230_regmap_spi_config);1578 if (IS_ERR(lp->regmap)) {1579 rc = PTR_ERR(lp->regmap);1580 dev_err(&spi->dev, "Failed to allocate register map: %d\n",1581 rc);1582 goto free_dev;1583 }1584 1585 at86rf230_setup_spi_messages(lp, &lp->state);1586 at86rf230_setup_spi_messages(lp, &lp->tx);1587 1588 rc = at86rf230_detect_device(lp);1589 if (rc < 0)1590 goto free_dev;1591 1592 init_completion(&lp->state_complete);1593 1594 spi_set_drvdata(spi, lp);1595 1596 rc = at86rf230_hw_init(lp, xtal_trim);1597 if (rc)1598 goto free_dev;1599 1600 /* Read irq status register to reset irq line */1601 rc = at86rf230_read_subreg(lp, RG_IRQ_STATUS, 0xff, 0, &status);1602 if (rc)1603 goto free_dev;1604 1605 irq_type = irq_get_trigger_type(spi->irq);1606 if (!irq_type)1607 irq_type = IRQF_TRIGGER_HIGH;1608 1609 rc = devm_request_irq(&spi->dev, spi->irq, at86rf230_isr,1610 IRQF_SHARED | irq_type, dev_name(&spi->dev), lp);1611 if (rc)1612 goto free_dev;1613 1614 /* disable_irq by default and wait for starting hardware */1615 disable_irq(spi->irq);1616 1617 /* going into sleep by default */1618 at86rf230_sleep(lp);1619 1620 rc = ieee802154_register_hw(lp->hw);1621 if (rc)1622 goto free_dev;1623 1624 return rc;1625 1626free_dev:1627 ieee802154_free_hw(lp->hw);1628 1629 return rc;1630}1631 1632static void at86rf230_remove(struct spi_device *spi)1633{1634 struct at86rf230_local *lp = spi_get_drvdata(spi);1635 1636 /* mask all at86rf230 irq's */1637 at86rf230_write_subreg(lp, SR_IRQ_MASK, 0);1638 ieee802154_unregister_hw(lp->hw);1639 ieee802154_free_hw(lp->hw);1640 dev_dbg(&spi->dev, "unregistered at86rf230\n");1641}1642 1643static const struct of_device_id at86rf230_of_match[] = {1644 { .compatible = "atmel,at86rf230", },1645 { .compatible = "atmel,at86rf231", },1646 { .compatible = "atmel,at86rf233", },1647 { .compatible = "atmel,at86rf212", },1648 { },1649};1650MODULE_DEVICE_TABLE(of, at86rf230_of_match);1651 1652static const struct spi_device_id at86rf230_device_id[] = {1653 { .name = "at86rf230", },1654 { .name = "at86rf231", },1655 { .name = "at86rf233", },1656 { .name = "at86rf212", },1657 { },1658};1659MODULE_DEVICE_TABLE(spi, at86rf230_device_id);1660 1661static struct spi_driver at86rf230_driver = {1662 .id_table = at86rf230_device_id,1663 .driver = {1664 .of_match_table = at86rf230_of_match,1665 .name = "at86rf230",1666 },1667 .probe = at86rf230_probe,1668 .remove = at86rf230_remove,1669};1670 1671module_spi_driver(at86rf230_driver);1672 1673MODULE_DESCRIPTION("AT86RF230 Transceiver Driver");1674MODULE_LICENSE("GPL v2");1675