// SPDX-License-Identifier: GPL-2.0-only
/*
* AT86RF230 / RF231 driver
*
* Copyright ( C ) 2009 - 2012 Siemens AG
*
* Written by :
* Dmitry Eremin - Solenikov < dbaryshkov @ gmail . com >
* Alexander Smirnov < alex . bluesman . smirnov @ gmail . com >
* Alexander Aring < aar @ pengutronix . de >
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/gpio/consumer.h>
#include <linux/hrtimer.h>
#include <linux/jiffies.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/delay.h>
#include <linux/property.h>
#include <linux/spi/spi.h>
#include <linux/regmap.h>
#include <linux/skbuff.h>
#include <linux/ieee802154.h>
#include <net/mac802154.h>
#include <net/cfg802154.h>
#include "at86rf230.h"
struct at86rf230_local;
/* at86rf2xx chip depend data.
* All timings are in us .
*/
struct at86rf2xx_chip_data {
u16 t_sleep_cycle;
u16 t_channel_switch;
u16 t_reset_to_off;
u16 t_off_to_aack;
u16 t_off_to_tx_on;
u16 t_off_to_sleep;
u16 t_sleep_to_off;
u16 t_frame;
u16 t_p_ack;
int rssi_base_val;
int (*set_channel)(struct at86rf230_local *, u8, u8);
int (*set_txpower)(struct at86rf230_local *, s32);
};
#define AT86RF2XX_MAX_BUF (127 + 3 )
/* tx retries to access the TX_ON state
* if it ' s above then force change will be started .
*
* We assume the max_frame_retries ( 7 ) value of 802 . 15 . 4 here .
*/
#define AT86RF2XX_MAX_TX_RETRIES 7
/* We use the recommended 5 minutes timeout to recalibrate */
#define AT86RF2XX_CAL_LOOP_TIMEOUT (5 * 60 * HZ)
struct at86rf230_state_change {
struct at86rf230_local *lp;
int irq;
struct hrtimer timer;
struct spi_message msg;
struct spi_transfer trx;
u8 buf[AT86RF2XX_MAX_BUF];
void (*complete)(void *context);
u8 from_state;
u8 to_state;
int trac;
bool free;
};
struct at86rf230_local {
struct spi_device *spi;
struct ieee802154_hw *hw;
struct at86rf2xx_chip_data *data;
struct regmap *regmap;
struct gpio_desc *slp_tr;
bool sleep;
struct completion state_complete;
struct at86rf230_state_change state;
unsigned long cal_timeout;
bool is_tx;
bool is_tx_from_off;
bool was_tx;
u8 tx_retry;
struct sk_buff *tx_skb;
struct at86rf230_state_change tx;
};
#define AT86RF2XX_NUMREGS 0 x3F
static void
at86rf230_async_state_change(struct at86rf230_local *lp,
struct at86rf230_state_change *ctx,
const u8 state, void (*complete)(void *context));
static inline void
at86rf230_sleep(struct at86rf230_local *lp)
{
if (lp->slp_tr) {
gpiod_set_value(lp->slp_tr, 1 );
usleep_range(lp->data->t_off_to_sleep,
lp->data->t_off_to_sleep + 10 );
lp->sleep = true ;
}
}
static inline void
at86rf230_awake(struct at86rf230_local *lp)
{
if (lp->slp_tr) {
gpiod_set_value(lp->slp_tr, 0 );
usleep_range(lp->data->t_sleep_to_off,
lp->data->t_sleep_to_off + 100 );
lp->sleep = false ;
}
}
static inline int
__at86rf230_write(struct at86rf230_local *lp,
unsigned int addr, unsigned int data)
{
bool sleep = lp->sleep;
int ret;
/* awake for register setting if sleep */
if (sleep)
at86rf230_awake(lp);
ret = regmap_write(lp->regmap, addr, data);
/* sleep again if was sleeping */
if (sleep)
at86rf230_sleep(lp);
return ret;
}
static inline int
__at86rf230_read(struct at86rf230_local *lp,
unsigned int addr, unsigned int *data)
{
bool sleep = lp->sleep;
int ret;
/* awake for register setting if sleep */
if (sleep)
at86rf230_awake(lp);
ret = regmap_read(lp->regmap, addr, data);
/* sleep again if was sleeping */
if (sleep)
at86rf230_sleep(lp);
return ret;
}
static inline int
at86rf230_read_subreg(struct at86rf230_local *lp,
unsigned int addr, unsigned int mask,
unsigned int shift, unsigned int *data)
{
int rc;
rc = __at86rf230_read(lp, addr, data);
if (!rc)
*data = (*data & mask) >> shift;
return rc;
}
static inline int
at86rf230_write_subreg(struct at86rf230_local *lp,
unsigned int addr, unsigned int mask,
unsigned int shift, unsigned int data)
{
bool sleep = lp->sleep;
int ret;
/* awake for register setting if sleep */
if (sleep)
at86rf230_awake(lp);
ret = regmap_update_bits(lp->regmap, addr, mask, data << shift);
/* sleep again if was sleeping */
if (sleep)
at86rf230_sleep(lp);
return ret;
}
static inline void
at86rf230_slp_tr_rising_edge(struct at86rf230_local *lp)
{
gpiod_set_value(lp->slp_tr, 1 );
udelay(1 );
gpiod_set_value(lp->slp_tr, 0 );
}
static bool
at86rf230_reg_writeable(struct device *dev, unsigned int reg)
{
switch (reg) {
case RG_TRX_STATE:
case RG_TRX_CTRL_0:
case RG_TRX_CTRL_1:
case RG_PHY_TX_PWR:
case RG_PHY_ED_LEVEL:
case RG_PHY_CC_CCA:
case RG_CCA_THRES:
case RG_RX_CTRL:
case RG_SFD_VALUE:
case RG_TRX_CTRL_2:
case RG_ANT_DIV:
case RG_IRQ_MASK:
case RG_VREG_CTRL:
case RG_BATMON:
case RG_XOSC_CTRL:
case RG_RX_SYN:
case RG_XAH_CTRL_1:
case RG_FTN_CTRL:
case RG_PLL_CF:
case RG_PLL_DCU:
case RG_SHORT_ADDR_0:
case RG_SHORT_ADDR_1:
case RG_PAN_ID_0:
case RG_PAN_ID_1:
case RG_IEEE_ADDR_0:
case RG_IEEE_ADDR_1:
case RG_IEEE_ADDR_2:
case RG_IEEE_ADDR_3:
case RG_IEEE_ADDR_4:
case RG_IEEE_ADDR_5:
case RG_IEEE_ADDR_6:
case RG_IEEE_ADDR_7:
case RG_XAH_CTRL_0:
case RG_CSMA_SEED_0:
case RG_CSMA_SEED_1:
case RG_CSMA_BE:
return true ;
default :
return false ;
}
}
static bool
at86rf230_reg_readable(struct device *dev, unsigned int reg)
{
bool rc;
/* all writeable are also readable */
rc = at86rf230_reg_writeable(dev, reg);
if (rc)
return rc;
/* readonly regs */
switch (reg) {
case RG_TRX_STATUS:
case RG_PHY_RSSI:
case RG_IRQ_STATUS:
case RG_PART_NUM:
case RG_VERSION_NUM:
case RG_MAN_ID_1:
case RG_MAN_ID_0:
return true ;
default :
return false ;
}
}
static bool
at86rf230_reg_volatile(struct device *dev, unsigned int reg)
{
/* can be changed during runtime */
switch (reg) {
case RG_TRX_STATUS:
case RG_TRX_STATE:
case RG_PHY_RSSI:
case RG_PHY_ED_LEVEL:
case RG_IRQ_STATUS:
case RG_VREG_CTRL:
case RG_PLL_CF:
case RG_PLL_DCU:
return true ;
default :
return false ;
}
}
static bool
at86rf230_reg_precious(struct device *dev, unsigned int reg)
{
/* don't clear irq line on read */
switch (reg) {
case RG_IRQ_STATUS:
return true ;
default :
return false ;
}
}
static const struct regmap_config at86rf230_regmap_spi_config = {
.reg_bits = 8 ,
.val_bits = 8 ,
.write_flag_mask = CMD_REG | CMD_WRITE,
.read_flag_mask = CMD_REG,
.cache_type = REGCACHE_MAPLE,
.max_register = AT86RF2XX_NUMREGS,
.writeable_reg = at86rf230_reg_writeable,
.readable_reg = at86rf230_reg_readable,
.volatile_reg = at86rf230_reg_volatile,
.precious_reg = at86rf230_reg_precious,
};
static void
at86rf230_async_error_recover_complete(void *context)
{
struct at86rf230_state_change *ctx = context;
struct at86rf230_local *lp = ctx->lp;
if (ctx->free)
kfree(ctx);
if (lp->was_tx) {
lp->was_tx = 0 ;
ieee802154_xmit_hw_error(lp->hw, lp->tx_skb);
}
}
static void
at86rf230_async_error_recover(void *context)
{
struct at86rf230_state_change *ctx = context;
struct at86rf230_local *lp = ctx->lp;
if (lp->is_tx) {
lp->was_tx = 1 ;
lp->is_tx = 0 ;
}
at86rf230_async_state_change(lp, ctx, STATE_RX_AACK_ON,
at86rf230_async_error_recover_complete);
}
static inline void
at86rf230_async_error(struct at86rf230_local *lp,
struct at86rf230_state_change *ctx, int rc)
{
dev_err(&lp->spi->dev, "spi_async error %d\n" , rc);
at86rf230_async_state_change(lp, ctx, STATE_FORCE_TRX_OFF,
at86rf230_async_error_recover);
}
/* Generic function to get some register value in async mode */
static void
at86rf230_async_read_reg(struct at86rf230_local *lp, u8 reg,
struct at86rf230_state_change *ctx,
void (*complete)(void *context))
{
int rc;
u8 *tx_buf = ctx->buf;
tx_buf[0 ] = (reg & CMD_REG_MASK) | CMD_REG;
ctx->msg.complete = complete;
rc = spi_async(lp->spi, &ctx->msg);
if (rc)
at86rf230_async_error(lp, ctx, rc);
}
static void
at86rf230_async_write_reg(struct at86rf230_local *lp, u8 reg, u8 val,
struct at86rf230_state_change *ctx,
void (*complete)(void *context))
{
int rc;
ctx->buf[0 ] = (reg & CMD_REG_MASK) | CMD_REG | CMD_WRITE;
ctx->buf[1 ] = val;
ctx->msg.complete = complete;
rc = spi_async(lp->spi, &ctx->msg);
if (rc)
at86rf230_async_error(lp, ctx, rc);
}
static void
at86rf230_async_state_assert(void *context)
{
struct at86rf230_state_change *ctx = context;
struct at86rf230_local *lp = ctx->lp;
const u8 *buf = ctx->buf;
const u8 trx_state = buf[1 ] & TRX_STATE_MASK;
/* Assert state change */
if (trx_state != ctx->to_state) {
/* Special handling if transceiver state is in
* STATE_BUSY_RX_AACK and a SHR was detected .
*/
if (trx_state == STATE_BUSY_RX_AACK) {
/* Undocumented race condition. If we send a state
* change to STATE_RX_AACK_ON the transceiver could
* change his state automatically to STATE_BUSY_RX_AACK
* if a SHR was detected . This is not an error , but we
* can ' t assert this .
*/
if (ctx->to_state == STATE_RX_AACK_ON)
goto done;
/* If we change to STATE_TX_ON without forcing and
* transceiver state is STATE_BUSY_RX_AACK , we wait
* ' tFrame + tPAck ' receiving time . In this time the
* PDU should be received . If the transceiver is still
* in STATE_BUSY_RX_AACK , we run a force state change
* to STATE_TX_ON . This is a timeout handling , if the
* transceiver stucks in STATE_BUSY_RX_AACK .
*
* Additional we do several retries to try to get into
* TX_ON state without forcing . If the retries are
* higher or equal than AT86RF2XX_MAX_TX_RETRIES we
* will do a force change .
*/
if (ctx->to_state == STATE_TX_ON ||
ctx->to_state == STATE_TRX_OFF) {
u8 state = ctx->to_state;
if (lp->tx_retry >= AT86RF2XX_MAX_TX_RETRIES)
state = STATE_FORCE_TRX_OFF;
lp->tx_retry++;
at86rf230_async_state_change(lp, ctx, state,
ctx->complete);
return ;
}
}
dev_warn(&lp->spi->dev, "unexcept state change from 0x%02x to 0x%02x. Actual state: 0x%02x\n" ,
ctx->from_state, ctx->to_state, trx_state);
}
done:
if (ctx->complete)
ctx->complete(context);
}
static enum hrtimer_restart at86rf230_async_state_timer(struct hrtimer *timer)
{
struct at86rf230_state_change *ctx =
container_of(timer, struct at86rf230_state_change, timer);
struct at86rf230_local *lp = ctx->lp;
at86rf230_async_read_reg(lp, RG_TRX_STATUS, ctx,
at86rf230_async_state_assert);
return HRTIMER_NORESTART;
}
/* Do state change timing delay. */
static void
at86rf230_async_state_delay(void *context)
{
struct at86rf230_state_change *ctx = context;
struct at86rf230_local *lp = ctx->lp;
struct at86rf2xx_chip_data *c = lp->data;
bool force = false ;
ktime_t tim;
/* The force state changes are will show as normal states in the
* state status subregister . We change the to_state to the
* corresponding one and remember if it was a force change , this
* differs if we do a state change from STATE_BUSY_RX_AACK .
*/
switch (ctx->to_state) {
case STATE_FORCE_TX_ON:
ctx->to_state = STATE_TX_ON;
force = true ;
break ;
case STATE_FORCE_TRX_OFF:
ctx->to_state = STATE_TRX_OFF;
force = true ;
break ;
default :
break ;
}
switch (ctx->from_state) {
case STATE_TRX_OFF:
switch (ctx->to_state) {
case STATE_RX_AACK_ON:
tim = c->t_off_to_aack * NSEC_PER_USEC;
/* state change from TRX_OFF to RX_AACK_ON to do a
* calibration , we need to reset the timeout for the
* next one .
*/
lp->cal_timeout = jiffies + AT86RF2XX_CAL_LOOP_TIMEOUT;
goto change;
case STATE_TX_ARET_ON:
case STATE_TX_ON:
tim = c->t_off_to_tx_on * NSEC_PER_USEC;
/* state change from TRX_OFF to TX_ON or ARET_ON to do
* a calibration , we need to reset the timeout for the
* next one .
*/
lp->cal_timeout = jiffies + AT86RF2XX_CAL_LOOP_TIMEOUT;
goto change;
default :
break ;
}
break ;
case STATE_BUSY_RX_AACK:
switch (ctx->to_state) {
case STATE_TRX_OFF:
case STATE_TX_ON:
/* Wait for worst case receiving time if we
* didn ' t make a force change from BUSY_RX_AACK
* to TX_ON or TRX_OFF .
*/
if (!force) {
tim = (c->t_frame + c->t_p_ack) * NSEC_PER_USEC;
goto change;
}
break ;
default :
break ;
}
break ;
/* Default value, means RESET state */
case STATE_P_ON:
switch (ctx->to_state) {
case STATE_TRX_OFF:
tim = c->t_reset_to_off * NSEC_PER_USEC;
goto change;
default :
break ;
}
break ;
default :
break ;
}
/* Default delay is 1us in the most cases */
udelay(1 );
at86rf230_async_state_timer(&ctx->timer);
return ;
change:
hrtimer_start(&ctx->timer, tim, HRTIMER_MODE_REL);
}
static void
at86rf230_async_state_change_start(void *context)
{
struct at86rf230_state_change *ctx = context;
struct at86rf230_local *lp = ctx->lp;
u8 *buf = ctx->buf;
const u8 trx_state = buf[1 ] & TRX_STATE_MASK;
/* Check for "possible" STATE_TRANSITION_IN_PROGRESS */
if (trx_state == STATE_TRANSITION_IN_PROGRESS) {
udelay(1 );
at86rf230_async_read_reg(lp, RG_TRX_STATUS, ctx,
at86rf230_async_state_change_start);
return ;
}
/* Check if we already are in the state which we change in */
if (trx_state == ctx->to_state) {
if (ctx->complete)
ctx->complete(context);
return ;
}
/* Set current state to the context of state change */
ctx->from_state = trx_state;
/* Going into the next step for a state change which do a timing
* relevant delay .
*/
at86rf230_async_write_reg(lp, RG_TRX_STATE, ctx->to_state, ctx,
at86rf230_async_state_delay);
}
static void
at86rf230_async_state_change(struct at86rf230_local *lp,
struct at86rf230_state_change *ctx,
const u8 state, void (*complete)(void *context))
{
/* Initialization for the state change context */
ctx->to_state = state;
ctx->complete = complete;
at86rf230_async_read_reg(lp, RG_TRX_STATUS, ctx,
at86rf230_async_state_change_start);
}
static void
at86rf230_sync_state_change_complete(void *context)
{
struct at86rf230_state_change *ctx = context;
struct at86rf230_local *lp = ctx->lp;
complete(&lp->state_complete);
}
/* This function do a sync framework above the async state change.
* Some callbacks of the IEEE 802 . 15 . 4 driver interface need to be
* handled synchronously .
*/
static int
at86rf230_sync_state_change(struct at86rf230_local *lp, unsigned int state)
{
unsigned long rc;
at86rf230_async_state_change(lp, &lp->state, state,
at86rf230_sync_state_change_complete);
rc = wait_for_completion_timeout(&lp->state_complete,
msecs_to_jiffies(100 ));
if (!rc) {
at86rf230_async_error(lp, &lp->state, -ETIMEDOUT);
return -ETIMEDOUT;
}
return 0 ;
}
static void
at86rf230_tx_complete(void *context)
{
struct at86rf230_state_change *ctx = context;
struct at86rf230_local *lp = ctx->lp;
if (ctx->trac == IEEE802154_SUCCESS)
ieee802154_xmit_complete(lp->hw, lp->tx_skb, false );
else
ieee802154_xmit_error(lp->hw, lp->tx_skb, ctx->trac);
kfree(ctx);
}
static void
at86rf230_tx_on(void *context)
{
struct at86rf230_state_change *ctx = context;
struct at86rf230_local *lp = ctx->lp;
at86rf230_async_state_change(lp, ctx, STATE_RX_AACK_ON,
at86rf230_tx_complete);
}
static void
at86rf230_tx_trac_check(void *context)
{
struct at86rf230_state_change *ctx = context;
struct at86rf230_local *lp = ctx->lp;
u8 trac = TRAC_MASK(ctx->buf[1 ]);
switch (trac) {
case TRAC_SUCCESS:
case TRAC_SUCCESS_DATA_PENDING:
ctx->trac = IEEE802154_SUCCESS;
break ;
case TRAC_CHANNEL_ACCESS_FAILURE:
ctx->trac = IEEE802154_CHANNEL_ACCESS_FAILURE;
break ;
case TRAC_NO_ACK:
ctx->trac = IEEE802154_NO_ACK;
break ;
default :
ctx->trac = IEEE802154_SYSTEM_ERROR;
}
at86rf230_async_state_change(lp, ctx, STATE_TX_ON, at86rf230_tx_on);
}
static void
at86rf230_rx_read_frame_complete(void *context)
{
struct at86rf230_state_change *ctx = context;
struct at86rf230_local *lp = ctx->lp;
const u8 *buf = ctx->buf;
struct sk_buff *skb;
u8 len, lqi;
len = buf[1 ];
if (!ieee802154_is_valid_psdu_len(len)) {
dev_vdbg(&lp->spi->dev, "corrupted frame received\n" );
len = IEEE802154_MTU;
}
lqi = buf[2 + len];
skb = dev_alloc_skb(IEEE802154_MTU);
if (!skb) {
dev_vdbg(&lp->spi->dev, "failed to allocate sk_buff\n" );
kfree(ctx);
return ;
}
skb_put_data(skb, buf + 2 , len);
ieee802154_rx_irqsafe(lp->hw, skb, lqi);
kfree(ctx);
}
static void
at86rf230_rx_trac_check(void *context)
{
struct at86rf230_state_change *ctx = context;
struct at86rf230_local *lp = ctx->lp;
u8 *buf = ctx->buf;
int rc;
buf[0 ] = CMD_FB;
ctx->trx.len = AT86RF2XX_MAX_BUF;
ctx->msg.complete = at86rf230_rx_read_frame_complete;
rc = spi_async(lp->spi, &ctx->msg);
if (rc) {
ctx->trx.len = 2 ;
at86rf230_async_error(lp, ctx, rc);
}
}
static void
at86rf230_irq_trx_end(void *context)
{
struct at86rf230_state_change *ctx = context;
struct at86rf230_local *lp = ctx->lp;
if (lp->is_tx) {
lp->is_tx = 0 ;
at86rf230_async_read_reg(lp, RG_TRX_STATE, ctx,
at86rf230_tx_trac_check);
} else {
at86rf230_async_read_reg(lp, RG_TRX_STATE, ctx,
at86rf230_rx_trac_check);
}
}
static void
at86rf230_irq_status(void *context)
{
struct at86rf230_state_change *ctx = context;
struct at86rf230_local *lp = ctx->lp;
const u8 *buf = ctx->buf;
u8 irq = buf[1 ];
enable_irq(lp->spi->irq);
if (irq & IRQ_TRX_END) {
at86rf230_irq_trx_end(ctx);
} else {
dev_err(&lp->spi->dev, "not supported irq %02x received\n" ,
irq);
kfree(ctx);
}
}
static void
at86rf230_setup_spi_messages(struct at86rf230_local *lp,
struct at86rf230_state_change *state)
{
state->lp = lp;
state->irq = lp->spi->irq;
spi_message_init(&state->msg);
state->msg.context = state;
state->trx.len = 2 ;
state->trx.tx_buf = state->buf;
state->trx.rx_buf = state->buf;
spi_message_add_tail(&state->trx, &state->msg);
hrtimer_setup(&state->timer, at86rf230_async_state_timer, CLOCK_MONOTONIC,
HRTIMER_MODE_REL);
}
static irqreturn_t at86rf230_isr(int irq, void *data)
{
struct at86rf230_local *lp = data;
struct at86rf230_state_change *ctx;
int rc;
disable_irq_nosync(irq);
ctx = kzalloc(sizeof (*ctx), GFP_ATOMIC);
if (!ctx) {
enable_irq(irq);
return IRQ_NONE;
}
at86rf230_setup_spi_messages(lp, ctx);
/* tell on error handling to free ctx */
ctx->free = true ;
ctx->buf[0 ] = (RG_IRQ_STATUS & CMD_REG_MASK) | CMD_REG;
ctx->msg.complete = at86rf230_irq_status;
rc = spi_async(lp->spi, &ctx->msg);
if (rc) {
at86rf230_async_error(lp, ctx, rc);
enable_irq(irq);
return IRQ_NONE;
}
return IRQ_HANDLED;
}
static void
at86rf230_write_frame_complete(void *context)
{
struct at86rf230_state_change *ctx = context;
struct at86rf230_local *lp = ctx->lp;
ctx->trx.len = 2 ;
if (lp->slp_tr)
at86rf230_slp_tr_rising_edge(lp);
else
at86rf230_async_write_reg(lp, RG_TRX_STATE, STATE_BUSY_TX, ctx,
NULL);
}
static void
at86rf230_write_frame(void *context)
{
struct at86rf230_state_change *ctx = context;
struct at86rf230_local *lp = ctx->lp;
struct sk_buff *skb = lp->tx_skb;
u8 *buf = ctx->buf;
int rc;
lp->is_tx = 1 ;
buf[0 ] = CMD_FB | CMD_WRITE;
buf[1 ] = skb->len + 2 ;
memcpy(buf + 2 , skb->data, skb->len);
ctx->trx.len = skb->len + 2 ;
ctx->msg.complete = at86rf230_write_frame_complete;
rc = spi_async(lp->spi, &ctx->msg);
if (rc) {
ctx->trx.len = 2 ;
at86rf230_async_error(lp, ctx, rc);
}
}
static void
at86rf230_xmit_tx_on(void *context)
{
struct at86rf230_state_change *ctx = context;
struct at86rf230_local *lp = ctx->lp;
at86rf230_async_state_change(lp, ctx, STATE_TX_ARET_ON,
at86rf230_write_frame);
}
static void
at86rf230_xmit_start(void *context)
{
struct at86rf230_state_change *ctx = context;
struct at86rf230_local *lp = ctx->lp;
/* check if we change from off state */
if (lp->is_tx_from_off)
at86rf230_async_state_change(lp, ctx, STATE_TX_ARET_ON,
at86rf230_write_frame);
else
at86rf230_async_state_change(lp, ctx, STATE_TX_ON,
at86rf230_xmit_tx_on);
}
static int
at86rf230_xmit(struct ieee802154_hw *hw, struct sk_buff *skb)
{
struct at86rf230_local *lp = hw->priv;
struct at86rf230_state_change *ctx = &lp->tx;
lp->tx_skb = skb;
lp->tx_retry = 0 ;
/* After 5 minutes in PLL and the same frequency we run again the
* calibration loops which is recommended by at86rf2xx datasheets .
*
* The calibration is initiate by a state change from TRX_OFF
* to TX_ON , the lp - > cal_timeout should be reinit by state_delay
* function then to start in the next 5 minutes .
*/
if (time_is_before_jiffies(lp->cal_timeout)) {
lp->is_tx_from_off = true ;
at86rf230_async_state_change(lp, ctx, STATE_TRX_OFF,
at86rf230_xmit_start);
} else {
lp->is_tx_from_off = false ;
at86rf230_xmit_start(ctx);
}
return 0 ;
}
static int
at86rf230_ed(struct ieee802154_hw *hw, u8 *level)
{
WARN_ON(!level);
*level = 0 xbe;
return 0 ;
}
static int
at86rf230_start(struct ieee802154_hw *hw)
{
struct at86rf230_local *lp = hw->priv;
at86rf230_awake(lp);
enable_irq(lp->spi->irq);
return at86rf230_sync_state_change(lp, STATE_RX_AACK_ON);
}
static void
at86rf230_stop(struct ieee802154_hw *hw)
{
struct at86rf230_local *lp = hw->priv;
u8 csma_seed[2 ];
at86rf230_sync_state_change(lp, STATE_FORCE_TRX_OFF);
disable_irq(lp->spi->irq);
/* It's recommended to set random new csma_seeds before sleep state.
* Makes only sense in the stop callback , not doing this inside of
* at86rf230_sleep , this is also used when we don ' t transmit afterwards
* when calling start callback again .
*/
get_random_bytes(csma_seed, ARRAY_SIZE(csma_seed));
at86rf230_write_subreg(lp, SR_CSMA_SEED_0, csma_seed[0 ]);
at86rf230_write_subreg(lp, SR_CSMA_SEED_1, csma_seed[1 ]);
at86rf230_sleep(lp);
}
static int
at86rf23x_set_channel(struct at86rf230_local *lp, u8 page, u8 channel)
{
return at86rf230_write_subreg(lp, SR_CHANNEL, channel);
}
#define AT86RF2XX_MAX_ED_LEVELS 0 xF
static const s32 at86rf233_ed_levels[AT86RF2XX_MAX_ED_LEVELS + 1 ] = {
-9400 , -9200 , -9000 , -8800 , -8600 , -8400 , -8200 , -8000 , -7800 , -7600 ,
-7400 , -7200 , -7000 , -6800 , -6600 , -6400 ,
};
static const s32 at86rf231_ed_levels[AT86RF2XX_MAX_ED_LEVELS + 1 ] = {
-9100 , -8900 , -8700 , -8500 , -8300 , -8100 , -7900 , -7700 , -7500 , -7300 ,
-7100 , -6900 , -6700 , -6500 , -6300 , -6100 ,
};
static const s32 at86rf212_ed_levels_100[AT86RF2XX_MAX_ED_LEVELS + 1 ] = {
-10000 , -9800 , -9600 , -9400 , -9200 , -9000 , -8800 , -8600 , -8400 , -8200 ,
-8000 , -7800 , -7600 , -7400 , -7200 , -7000 ,
};
static const s32 at86rf212_ed_levels_98[AT86RF2XX_MAX_ED_LEVELS + 1 ] = {
-9800 , -9600 , -9400 , -9200 , -9000 , -8800 , -8600 , -8400 , -8200 , -8000 ,
-7800 , -7600 , -7400 , -7200 , -7000 , -6800 ,
};
static inline int
at86rf212_update_cca_ed_level(struct at86rf230_local *lp, int rssi_base_val)
{
unsigned int cca_ed_thres;
int rc;
rc = at86rf230_read_subreg(lp, SR_CCA_ED_THRES, &cca_ed_thres);
if (rc < 0 )
return rc;
switch (rssi_base_val) {
case -98 :
lp->hw->phy->supported.cca_ed_levels = at86rf212_ed_levels_98;
lp->hw->phy->supported.cca_ed_levels_size = ARRAY_SIZE(at86rf212_ed_levels_98);
lp->hw->phy->cca_ed_level = at86rf212_ed_levels_98[cca_ed_thres];
break ;
case -100 :
lp->hw->phy->supported.cca_ed_levels = at86rf212_ed_levels_100;
lp->hw->phy->supported.cca_ed_levels_size = ARRAY_SIZE(at86rf212_ed_levels_100);
lp->hw->phy->cca_ed_level = at86rf212_ed_levels_100[cca_ed_thres];
break ;
default :
WARN_ON(1 );
}
return 0 ;
}
static int
at86rf212_set_channel(struct at86rf230_local *lp, u8 page, u8 channel)
{
int rc;
if (channel == 0 )
rc = at86rf230_write_subreg(lp, SR_SUB_MODE, 0 );
else
rc = at86rf230_write_subreg(lp, SR_SUB_MODE, 1 );
if (rc < 0 )
return rc;
if (page == 0 ) {
rc = at86rf230_write_subreg(lp, SR_BPSK_QPSK, 0 );
lp->data->rssi_base_val = -100 ;
} else {
rc = at86rf230_write_subreg(lp, SR_BPSK_QPSK, 1 );
lp->data->rssi_base_val = -98 ;
}
if (rc < 0 )
return rc;
rc = at86rf212_update_cca_ed_level(lp, lp->data->rssi_base_val);
if (rc < 0 )
return rc;
return at86rf230_write_subreg(lp, SR_CHANNEL, channel);
}
static int
at86rf230_channel(struct ieee802154_hw *hw, u8 page, u8 channel)
{
struct at86rf230_local *lp = hw->priv;
int rc;
rc = lp->data->set_channel(lp, page, channel);
/* Wait for PLL */
usleep_range(lp->data->t_channel_switch,
lp->data->t_channel_switch + 10 );
lp->cal_timeout = jiffies + AT86RF2XX_CAL_LOOP_TIMEOUT;
return rc;
}
static int
at86rf230_set_hw_addr_filt(struct ieee802154_hw *hw,
struct ieee802154_hw_addr_filt *filt,
unsigned long changed)
{
struct at86rf230_local *lp = hw->priv;
if (changed & IEEE802154_AFILT_SADDR_CHANGED) {
u16 addr = le16_to_cpu(filt->short_addr);
dev_vdbg(&lp->spi->dev, "%s called for saddr\n" , __func__);
__at86rf230_write(lp, RG_SHORT_ADDR_0, addr);
__at86rf230_write(lp, RG_SHORT_ADDR_1, addr >> 8 );
}
if (changed & IEEE802154_AFILT_PANID_CHANGED) {
u16 pan = le16_to_cpu(filt->pan_id);
dev_vdbg(&lp->spi->dev, "%s called for pan id\n" , __func__);
__at86rf230_write(lp, RG_PAN_ID_0, pan);
__at86rf230_write(lp, RG_PAN_ID_1, pan >> 8 );
}
if (changed & IEEE802154_AFILT_IEEEADDR_CHANGED) {
u8 i, addr[8 ];
memcpy(addr, &filt->ieee_addr, 8 );
dev_vdbg(&lp->spi->dev, "%s called for IEEE addr\n" , __func__);
for (i = 0 ; i < 8 ; i++)
__at86rf230_write(lp, RG_IEEE_ADDR_0 + i, addr[i]);
}
if (changed & IEEE802154_AFILT_PANC_CHANGED) {
dev_vdbg(&lp->spi->dev, "%s called for panc change\n" , __func__);
if (filt->pan_coord)
at86rf230_write_subreg(lp, SR_AACK_I_AM_COORD, 1 );
else
at86rf230_write_subreg(lp, SR_AACK_I_AM_COORD, 0 );
}
return 0 ;
}
#define AT86RF23X_MAX_TX_POWERS 0 xF
static const s32 at86rf233_powers[AT86RF23X_MAX_TX_POWERS + 1 ] = {
400 , 370 , 340 , 300 , 250 , 200 , 100 , 0 , -100 , -200 , -300 , -400 , -600 ,
-800 , -1200 , -1700 ,
};
static const s32 at86rf231_powers[AT86RF23X_MAX_TX_POWERS + 1 ] = {
300 , 280 , 230 , 180 , 130 , 70 , 0 , -100 , -200 , -300 , -400 , -500 , -700 ,
-900 , -1200 , -1700 ,
};
#define AT86RF212_MAX_TX_POWERS 0 x1F
static const s32 at86rf212_powers[AT86RF212_MAX_TX_POWERS + 1 ] = {
500 , 400 , 300 , 200 , 100 , 0 , -100 , -200 , -300 , -400 , -500 , -600 , -700 ,
-800 , -900 , -1000 , -1100 , -1200 , -1300 , -1400 , -1500 , -1600 , -1700 ,
-1800 , -1900 , -2000 , -2100 , -2200 , -2300 , -2400 , -2500 , -2600 ,
};
static int
at86rf23x_set_txpower(struct at86rf230_local *lp, s32 mbm)
{
u32 i;
for (i = 0 ; i < lp->hw->phy->supported.tx_powers_size; i++) {
if (lp->hw->phy->supported.tx_powers[i] == mbm)
return at86rf230_write_subreg(lp, SR_TX_PWR_23X, i);
}
return -EINVAL;
}
static int
at86rf212_set_txpower(struct at86rf230_local *lp, s32 mbm)
{
u32 i;
for (i = 0 ; i < lp->hw->phy->supported.tx_powers_size; i++) {
if (lp->hw->phy->supported.tx_powers[i] == mbm)
return at86rf230_write_subreg(lp, SR_TX_PWR_212, i);
}
return -EINVAL;
}
static int
at86rf230_set_txpower(struct ieee802154_hw *hw, s32 mbm)
{
struct at86rf230_local *lp = hw->priv;
return lp->data->set_txpower(lp, mbm);
}
static int
at86rf230_set_lbt(struct ieee802154_hw *hw, bool on)
{
struct at86rf230_local *lp = hw->priv;
return at86rf230_write_subreg(lp, SR_CSMA_LBT_MODE, on);
}
static int
at86rf230_set_cca_mode(struct ieee802154_hw *hw,
const struct wpan_phy_cca *cca)
{
struct at86rf230_local *lp = hw->priv;
u8 val;
/* mapping 802.15.4 to driver spec */
switch (cca->mode) {
case NL802154_CCA_ENERGY:
val = 1 ;
break ;
case NL802154_CCA_CARRIER:
val = 2 ;
break ;
case NL802154_CCA_ENERGY_CARRIER:
switch (cca->opt) {
case NL802154_CCA_OPT_ENERGY_CARRIER_AND:
val = 3 ;
break ;
case NL802154_CCA_OPT_ENERGY_CARRIER_OR:
val = 0 ;
break ;
default :
return -EINVAL;
}
break ;
default :
return -EINVAL;
}
return at86rf230_write_subreg(lp, SR_CCA_MODE, val);
}
static int
at86rf230_set_cca_ed_level(struct ieee802154_hw *hw, s32 mbm)
{
struct at86rf230_local *lp = hw->priv;
u32 i;
for (i = 0 ; i < hw->phy->supported.cca_ed_levels_size; i++) {
if (hw->phy->supported.cca_ed_levels[i] == mbm)
return at86rf230_write_subreg(lp, SR_CCA_ED_THRES, i);
}
return -EINVAL;
}
static int
at86rf230_set_csma_params(struct ieee802154_hw *hw, u8 min_be, u8 max_be,
u8 retries)
{
struct at86rf230_local *lp = hw->priv;
int rc;
rc = at86rf230_write_subreg(lp, SR_MIN_BE, min_be);
if (rc)
return rc;
rc = at86rf230_write_subreg(lp, SR_MAX_BE, max_be);
if (rc)
return rc;
return at86rf230_write_subreg(lp, SR_MAX_CSMA_RETRIES, retries);
}
static int
at86rf230_set_frame_retries(struct ieee802154_hw *hw, s8 retries)
{
struct at86rf230_local *lp = hw->priv;
return at86rf230_write_subreg(lp, SR_MAX_FRAME_RETRIES, retries);
}
static int
at86rf230_set_promiscuous_mode(struct ieee802154_hw *hw, const bool on)
{
struct at86rf230_local *lp = hw->priv;
int rc;
if (on) {
rc = at86rf230_write_subreg(lp, SR_AACK_DIS_ACK, 1 );
if (rc < 0 )
return rc;
rc = at86rf230_write_subreg(lp, SR_AACK_PROM_MODE, 1 );
if (rc < 0 )
return rc;
} else {
rc = at86rf230_write_subreg(lp, SR_AACK_PROM_MODE, 0 );
if (rc < 0 )
return rc;
rc = at86rf230_write_subreg(lp, SR_AACK_DIS_ACK, 0 );
if (rc < 0 )
return rc;
}
return 0 ;
}
static const struct ieee802154_ops at86rf230_ops = {
.owner = THIS_MODULE,
.xmit_async = at86rf230_xmit,
.ed = at86rf230_ed,
.set_channel = at86rf230_channel,
.start = at86rf230_start,
.stop = at86rf230_stop,
.set_hw_addr_filt = at86rf230_set_hw_addr_filt,
.set_txpower = at86rf230_set_txpower,
.set_lbt = at86rf230_set_lbt,
.set_cca_mode = at86rf230_set_cca_mode,
.set_cca_ed_level = at86rf230_set_cca_ed_level,
.set_csma_params = at86rf230_set_csma_params,
.set_frame_retries = at86rf230_set_frame_retries,
.set_promiscuous_mode = at86rf230_set_promiscuous_mode,
};
static struct at86rf2xx_chip_data at86rf233_data = {
.t_sleep_cycle = 330 ,
.t_channel_switch = 11 ,
.t_reset_to_off = 26 ,
.t_off_to_aack = 80 ,
.t_off_to_tx_on = 80 ,
.t_off_to_sleep = 35 ,
.t_sleep_to_off = 1000 ,
.t_frame = 4096 ,
.t_p_ack = 545 ,
.rssi_base_val = -94 ,
.set_channel = at86rf23x_set_channel,
.set_txpower = at86rf23x_set_txpower,
};
static struct at86rf2xx_chip_data at86rf231_data = {
.t_sleep_cycle = 330 ,
.t_channel_switch = 24 ,
.t_reset_to_off = 37 ,
.t_off_to_aack = 110 ,
.t_off_to_tx_on = 110 ,
.t_off_to_sleep = 35 ,
.t_sleep_to_off = 1000 ,
.t_frame = 4096 ,
.t_p_ack = 545 ,
.rssi_base_val = -91 ,
.set_channel = at86rf23x_set_channel,
.set_txpower = at86rf23x_set_txpower,
};
static struct at86rf2xx_chip_data at86rf212_data = {
.t_sleep_cycle = 330 ,
.t_channel_switch = 11 ,
.t_reset_to_off = 26 ,
.t_off_to_aack = 200 ,
.t_off_to_tx_on = 200 ,
.t_off_to_sleep = 35 ,
.t_sleep_to_off = 1000 ,
.t_frame = 4096 ,
.t_p_ack = 545 ,
.rssi_base_val = -100 ,
.set_channel = at86rf212_set_channel,
.set_txpower = at86rf212_set_txpower,
};
static int at86rf230_hw_init(struct at86rf230_local *lp, u8 xtal_trim)
{
int rc, irq_type, irq_pol = IRQ_ACTIVE_HIGH;
unsigned int dvdd;
u8 csma_seed[2 ];
rc = at86rf230_sync_state_change(lp, STATE_FORCE_TRX_OFF);
if (rc)
return rc;
irq_type = irq_get_trigger_type(lp->spi->irq);
if (irq_type == IRQ_TYPE_EDGE_FALLING ||
irq_type == IRQ_TYPE_LEVEL_LOW)
irq_pol = IRQ_ACTIVE_LOW;
rc = at86rf230_write_subreg(lp, SR_IRQ_POLARITY, irq_pol);
if (rc)
return rc;
rc = at86rf230_write_subreg(lp, SR_RX_SAFE_MODE, 1 );
if (rc)
return rc;
rc = at86rf230_write_subreg(lp, SR_IRQ_MASK, IRQ_TRX_END);
if (rc)
return rc;
/* reset values differs in at86rf231 and at86rf233 */
rc = at86rf230_write_subreg(lp, SR_IRQ_MASK_MODE, 0 );
if (rc)
return rc;
get_random_bytes(csma_seed, ARRAY_SIZE(csma_seed));
rc = at86rf230_write_subreg(lp, SR_CSMA_SEED_0, csma_seed[0 ]);
if (rc)
return rc;
rc = at86rf230_write_subreg(lp, SR_CSMA_SEED_1, csma_seed[1 ]);
if (rc)
return rc;
/* CLKM changes are applied immediately */
rc = at86rf230_write_subreg(lp, SR_CLKM_SHA_SEL, 0 x00);
if (rc)
return rc;
/* Turn CLKM Off */
rc = at86rf230_write_subreg(lp, SR_CLKM_CTRL, 0 x00);
if (rc)
return rc;
/* Wait the next SLEEP cycle */
usleep_range(lp->data->t_sleep_cycle,
lp->data->t_sleep_cycle + 100 );
/* xtal_trim value is calculated by:
* CL = 0 . 5 * ( CX + CTRIM + CPAR )
*
* whereas :
* CL = capacitor of used crystal
* CX = connected capacitors at xtal pins
* CPAR = in all at86rf2xx datasheets this is a constant value 3 pF ,
* but this is different on each board setup . You need to fine
* tuning this value via CTRIM .
* CTRIM = variable capacitor setting . Resolution is 0 . 3 pF range is
* 0 pF upto 4 . 5 pF .
*
* Examples :
* atben transceiver :
*
* CL = 8 pF
* CX = 12 pF
* CPAR = 3 pF ( We assume the magic constant from datasheet )
* CTRIM = 0 . 9 pF
*
* ( 12 + 0 . 9 + 3 ) / 2 = 7 . 95 which is nearly at 8 pF
*
* xtal_trim = 0 x3
*
* openlabs transceiver :
*
* CL = 16 pF
* CX = 22 pF
* CPAR = 3 pF ( We assume the magic constant from datasheet )
* CTRIM = 4 . 5 pF
*
* ( 22 + 4 . 5 + 3 ) / 2 = 14 . 75 which is the nearest value to 16 pF
*
* xtal_trim = 0 xf
*/
rc = at86rf230_write_subreg(lp, SR_XTAL_TRIM, xtal_trim);
if (rc)
return rc;
rc = at86rf230_read_subreg(lp, SR_DVDD_OK, &dvdd);
if (rc)
return rc;
if (!dvdd) {
dev_err(&lp->spi->dev, "DVDD error\n" );
return -EINVAL;
}
/* Force setting slotted operation bit to 0. Sometimes the atben
* sets this bit and I don ' t know why . We set this always force
* to zero while probing .
*/
return at86rf230_write_subreg(lp, SR_SLOTTED_OPERATION, 0 );
}
static int
at86rf230_detect_device(struct at86rf230_local *lp)
{
unsigned int part, version, val;
u16 man_id = 0 ;
const char *chip;
int rc;
rc = __at86rf230_read(lp, RG_MAN_ID_0, &val);
if (rc)
return rc;
man_id |= val;
rc = __at86rf230_read(lp, RG_MAN_ID_1, &val);
if (rc)
return rc;
man_id |= (val << 8 );
rc = __at86rf230_read(lp, RG_PART_NUM, &part);
if (rc)
return rc;
rc = __at86rf230_read(lp, RG_VERSION_NUM, &version);
if (rc)
return rc;
if (man_id != 0 x001f) {
dev_err(&lp->spi->dev, "Non-Atmel dev found (MAN_ID %02x %02x)\n" ,
man_id >> 8 , man_id & 0 xFF);
return -EINVAL;
}
lp->hw->flags = IEEE802154_HW_TX_OMIT_CKSUM |
IEEE802154_HW_CSMA_PARAMS |
IEEE802154_HW_FRAME_RETRIES | IEEE802154_HW_AFILT |
IEEE802154_HW_PROMISCUOUS;
lp->hw->phy->flags = WPAN_PHY_FLAG_TXPOWER |
WPAN_PHY_FLAG_CCA_ED_LEVEL |
WPAN_PHY_FLAG_CCA_MODE;
lp->hw->phy->supported.cca_modes = BIT(NL802154_CCA_ENERGY) |
BIT(NL802154_CCA_CARRIER) | BIT(NL802154_CCA_ENERGY_CARRIER);
lp->hw->phy->supported.cca_opts = BIT(NL802154_CCA_OPT_ENERGY_CARRIER_AND) |
BIT(NL802154_CCA_OPT_ENERGY_CARRIER_OR);
lp->hw->phy->cca.mode = NL802154_CCA_ENERGY;
switch (part) {
case 2 :
chip = "at86rf230" ;
rc = -ENOTSUPP;
goto not_supp;
case 3 :
chip = "at86rf231" ;
lp->data = &at86rf231_data;
lp->hw->phy->supported.channels[0 ] = 0 x7FFF800;
lp->hw->phy->current_channel = 11 ;
lp->hw->phy->supported.tx_powers = at86rf231_powers;
lp->hw->phy->supported.tx_powers_size = ARRAY_SIZE(at86rf231_powers);
lp->hw->phy->supported.cca_ed_levels = at86rf231_ed_levels;
lp->hw->phy->supported.cca_ed_levels_size = ARRAY_SIZE(at86rf231_ed_levels);
break ;
case 7 :
chip = "at86rf212" ;
lp->data = &at86rf212_data;
lp->hw->flags |= IEEE802154_HW_LBT;
lp->hw->phy->supported.channels[0 ] = 0 x00007FF;
lp->hw->phy->supported.channels[2 ] = 0 x00007FF;
lp->hw->phy->current_channel = 5 ;
lp->hw->phy->supported.lbt = NL802154_SUPPORTED_BOOL_BOTH;
lp->hw->phy->supported.tx_powers = at86rf212_powers;
lp->hw->phy->supported.tx_powers_size = ARRAY_SIZE(at86rf212_powers);
lp->hw->phy->supported.cca_ed_levels = at86rf212_ed_levels_100;
lp->hw->phy->supported.cca_ed_levels_size = ARRAY_SIZE(at86rf212_ed_levels_100);
break ;
case 11 :
chip = "at86rf233" ;
lp->data = &at86rf233_data;
lp->hw->phy->supported.channels[0 ] = 0 x7FFF800;
lp->hw->phy->current_channel = 13 ;
lp->hw->phy->supported.tx_powers = at86rf233_powers;
lp->hw->phy->supported.tx_powers_size = ARRAY_SIZE(at86rf233_powers);
lp->hw->phy->supported.cca_ed_levels = at86rf233_ed_levels;
lp->hw->phy->supported.cca_ed_levels_size = ARRAY_SIZE(at86rf233_ed_levels);
break ;
default :
chip = "unknown" ;
rc = -ENOTSUPP;
goto not_supp;
}
lp->hw->phy->cca_ed_level = lp->hw->phy->supported.cca_ed_levels[7 ];
lp->hw->phy->transmit_power = lp->hw->phy->supported.tx_powers[0 ];
not_supp:
dev_info(&lp->spi->dev, "Detected %s chip version %d\n" , chip, version);
return rc;
}
static int at86rf230_probe(struct spi_device *spi)
{
struct ieee802154_hw *hw;
struct at86rf230_local *lp;
struct gpio_desc *slp_tr;
struct gpio_desc *rstn;
unsigned int status;
int rc, irq_type;
u8 xtal_trim;
if (!spi->irq) {
dev_err(&spi->dev, "no IRQ specified\n" );
return -EINVAL;
}
rc = device_property_read_u8(&spi->dev, "xtal-trim" , &xtal_trim);
if (rc < 0 ) {
if (rc != -EINVAL) {
dev_err(&spi->dev,
"failed to parse xtal-trim: %d\n" , rc);
return rc;
}
xtal_trim = 0 ;
}
rstn = devm_gpiod_get_optional(&spi->dev, "reset" , GPIOD_OUT_LOW);
rc = PTR_ERR_OR_ZERO(rstn);
if (rc)
return rc;
gpiod_set_consumer_name(rstn, "rstn" );
slp_tr = devm_gpiod_get_optional(&spi->dev, "sleep" , GPIOD_OUT_LOW);
rc = PTR_ERR_OR_ZERO(slp_tr);
if (rc)
return rc;
gpiod_set_consumer_name(slp_tr, "slp_tr" );
/* Reset */
if (rstn) {
udelay(1 );
gpiod_set_value_cansleep(rstn, 1 );
udelay(1 );
gpiod_set_value_cansleep(rstn, 0 );
usleep_range(120 , 240 );
}
hw = ieee802154_alloc_hw(sizeof (*lp), &at86rf230_ops);
if (!hw)
return -ENOMEM;
lp = hw->priv;
lp->hw = hw;
lp->spi = spi;
lp->slp_tr = slp_tr;
hw->parent = &spi->dev;
ieee802154_random_extended_addr(&hw->phy->perm_extended_addr);
lp->regmap = devm_regmap_init_spi(spi, &at86rf230_regmap_spi_config);
if (IS_ERR(lp->regmap)) {
rc = PTR_ERR(lp->regmap);
dev_err(&spi->dev, "Failed to allocate register map: %d\n" ,
rc);
goto free_dev;
}
at86rf230_setup_spi_messages(lp, &lp->state);
at86rf230_setup_spi_messages(lp, &lp->tx);
rc = at86rf230_detect_device(lp);
if (rc < 0 )
goto free_dev;
init_completion(&lp->state_complete);
spi_set_drvdata(spi, lp);
rc = at86rf230_hw_init(lp, xtal_trim);
if (rc)
goto free_dev;
/* Read irq status register to reset irq line */
rc = at86rf230_read_subreg(lp, RG_IRQ_STATUS, 0 xff, 0 , &status);
if (rc)
goto free_dev;
irq_type = irq_get_trigger_type(spi->irq);
if (!irq_type)
irq_type = IRQF_TRIGGER_HIGH;
rc = devm_request_irq(&spi->dev, spi->irq, at86rf230_isr,
IRQF_SHARED | irq_type, dev_name(&spi->dev), lp);
if (rc)
goto free_dev;
/* disable_irq by default and wait for starting hardware */
disable_irq(spi->irq);
/* going into sleep by default */
at86rf230_sleep(lp);
rc = ieee802154_register_hw(lp->hw);
if (rc)
goto free_dev;
return rc;
free_dev:
ieee802154_free_hw(lp->hw);
return rc;
}
static void at86rf230_remove(struct spi_device *spi)
{
struct at86rf230_local *lp = spi_get_drvdata(spi);
/* mask all at86rf230 irq's */
at86rf230_write_subreg(lp, SR_IRQ_MASK, 0 );
ieee802154_unregister_hw(lp->hw);
ieee802154_free_hw(lp->hw);
dev_dbg(&spi->dev, "unregistered at86rf230\n" );
}
static const struct of_device_id at86rf230_of_match[] = {
{ .compatible = "atmel,at86rf230" , },
{ .compatible = "atmel,at86rf231" , },
{ .compatible = "atmel,at86rf233" , },
{ .compatible = "atmel,at86rf212" , },
{ },
};
MODULE_DEVICE_TABLE(of, at86rf230_of_match);
static const struct spi_device_id at86rf230_device_id[] = {
{ .name = "at86rf230" , },
{ .name = "at86rf231" , },
{ .name = "at86rf233" , },
{ .name = "at86rf212" , },
{ },
};
MODULE_DEVICE_TABLE(spi, at86rf230_device_id);
static struct spi_driver at86rf230_driver = {
.id_table = at86rf230_device_id,
.driver = {
.of_match_table = at86rf230_of_match,
.name = "at86rf230" ,
},
.probe = at86rf230_probe,
.remove = at86rf230_remove,
};
module_spi_driver(at86rf230_driver);
MODULE_DESCRIPTION("AT86RF230 Transceiver Driver" );
MODULE_LICENSE("GPL v2" );
Messung V0.5 in Prozent C=98 H=96 G=96
¤ Dauer der Verarbeitung: 0.20 Sekunden
(vorverarbeitet am 2026-10-01)
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