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_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_tx_trac_status(void *context)
{
struct at86rf230_state_change *ctx = context;
struct at86rf230_local *lp = ctx->lp;
at86rf230_async_read_reg(lp, RG_TRX_STATE, ctx,
at86rf230_tx_trac_check, true);
}
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 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;
}
static void
at86rf230_irq_trx_end(struct at86rf230_local *lp)
{
if (lp->is_tx) {
lp->is_tx = 0;
at86rf230_async_state_change(lp, &lp->irq,
STATE_FORCE_TX_ON,
at86rf230_tx_trac_status,
true);
} else {
at86rf230_async_read_reg(lp, RG_TRX_STATE, &lp->irq,
at86rf230_rx_trac_check, true);
}
}
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] & 0x1f;
int rc;
/* 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,
ctx->irq_enable);
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.
*/
buf[0] = (RG_TRX_STATE & CMD_REG_MASK) | CMD_REG | CMD_WRITE;
buf[1] = ctx->to_state;
ctx->trx.len = 2;
ctx->msg.complete = at86rf230_async_state_delay;
rc = spi_async(lp->spi, &ctx->msg);
if (rc) {
if (ctx->irq_enable)
enable_irq(lp->spi->irq);
at86rf230_async_error(lp, ctx, rc);
}
}
static void
at86rf230_irq_trx_end(struct at86rf230_local *lp)
{
spin_lock(&lp->lock);
if (lp->is_tx) {
lp->is_tx = 0;
spin_unlock(&lp->lock);
if (lp->tx_aret)
at86rf230_async_state_change(lp, &lp->irq,
STATE_FORCE_TX_ON,
at86rf230_tx_trac_status,
true);
else
at86rf230_async_state_change(lp, &lp->irq,
STATE_RX_AACK_ON,
at86rf230_tx_complete,
true);
} else {
spin_unlock(&lp->lock);
at86rf230_async_read_reg(lp, RG_TRX_STATE, &lp->irq,
at86rf230_rx_trac_check, true);
}
}
/* 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;
/* 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:
usleep_range(c->t_off_to_aack, c->t_off_to_aack + 10);
goto change;
case STATE_TX_ON:
usleep_range(c->t_off_to_tx_on,
c->t_off_to_tx_on + 10);
goto change;
default:
break;
}
break;
case STATE_BUSY_RX_AACK:
switch (ctx->to_state) {
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.
*/
if (!force) {
usleep_range(c->t_frame + c->t_p_ack,
c->t_frame + c->t_p_ack + 1000);
goto change;
}
break;
default:
break;
}
break;
/* Default value, means RESET state */
case STATE_P_ON:
switch (ctx->to_state) {
case STATE_TRX_OFF:
usleep_range(c->t_reset_to_off, c->t_reset_to_off + 10);
goto change;
default:
break;
}
break;
default:
break;
}
/* Default delay is 1us in the most cases */
udelay(1);
change:
at86rf230_async_read_reg(lp, RG_TRX_STATUS, ctx,
at86rf230_async_state_assert,
ctx->irq_enable);
}