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_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);
}
/* 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_write_frame_complete(void *context)
{
struct at86rf230_state_change *ctx = context;
struct at86rf230_local *lp = ctx->lp;
u8 *buf = ctx->buf;
int rc;
buf[0] = (RG_TRX_STATE & CMD_REG_MASK) | CMD_REG | CMD_WRITE;
buf[1] = STATE_BUSY_TX;
ctx->trx.len = 2;
ctx->msg.complete = NULL;
rc = spi_async(lp->spi, &ctx->msg);
if (rc)
at86rf230_async_error(lp, ctx, rc);
}
static void
at86rf230_rx_read_frame(struct at86rf230_local *lp)
{
int rc;
u8 *buf = lp->irq.buf;
buf[0] = CMD_FB;
lp->irq.trx.len = AT86RF2XX_MAX_BUF;
lp->irq.msg.complete = at86rf230_rx_read_frame_complete;
rc = spi_async(lp->spi, &lp->irq.msg);
if (rc) {
enable_irq(lp->spi->irq);
at86rf230_async_error(lp, &lp->irq, rc);
}
}
/* 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_rx_read_frame(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;
enable_irq(ctx->irq);
at86rf230_async_error(lp, ctx, rc);
}
}
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 irqreturn_t at86rf230_isr(int irq, void *data)
{
struct at86rf230_local *lp = data;
struct at86rf230_state_change *ctx = &lp->irq;
u8 *buf = ctx->buf;
int rc;
disable_irq_nosync(irq);
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) {
enable_irq(irq);
at86rf230_async_error(lp, ctx, rc);
return IRQ_NONE;
}
return IRQ_HANDLED;
}
/* Generic function to get some register value in async mode */
static void
at86rf230_async_read_reg(struct at86rf230_local *lp, const u8 reg,
struct at86rf230_state_change *ctx,
void (*complete)(void *context),
const bool irq_enable)
{
int rc;
u8 *tx_buf = ctx->buf;
tx_buf[0] = (reg & CMD_REG_MASK) | CMD_REG;
ctx->msg.complete = complete;
ctx->irq_enable = irq_enable;
rc = spi_async(lp->spi, &ctx->msg);
if (rc) {
if (irq_enable)
enable_irq(ctx->irq);
at86rf230_async_error(lp, ctx, rc);
}
}
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 = lp->tx.buf;
int rc;
spin_lock(&lp->lock);
lp->is_tx = 1;
spin_unlock(&lp->lock);
buf[0] = CMD_FB | CMD_WRITE;
buf[1] = skb->len + 2;
memcpy(buf + 2, skb->data, skb->len);
lp->tx.trx.len = skb->len + 2;
lp->tx.msg.complete = at86rf230_write_frame_complete;
rc = spi_async(lp->spi, &lp->tx.msg);
if (rc)
at86rf230_async_error(lp, ctx, rc);
}
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;
if (IS_ENABLED(CONFIG_IEEE802154_AT86RF230_DEBUGFS)) {
u8 trac = TRAC_MASK(buf[1]);
switch (trac) {
case TRAC_SUCCESS:
lp->trac.success++;
break;
case TRAC_SUCCESS_WAIT_FOR_ACK:
lp->trac.success_wait_for_ack++;
break;
case TRAC_INVALID:
lp->trac.invalid++;
break;
default:
WARN_ONCE(1, "received rx trac status %d\n", trac);
break;
}
}
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);
}
}
