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ieee802154: enable smart transmitter features of RF212 

This patch does multiple things:

 * add .set_csma_params and .set_frame_retries for the RF212 radio.
   This should work fine with RF230, but since I have no RF230 radios to
   test with, RF230 does not implement these right now
 * enable TX_ARET for frame retransmission limits greater than -1

Since RF230 has no operations to change CSMA parameters or frame retry
limits, RF230 will not be able to enter TX_ARET with this patch.

Signed-off-by: Phoebe Buckheister <phoebe.buckheister@itwm.fraunhofer.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Phoebe Buckheister 2014-02-17 11:34:15 +01:00 committed by David S. Miller
parent 4244db1b0b
commit f2fdd67c6b
1 changed files with 63 additions and 1 deletions
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64
drivers/net/ieee802154/at86rf230.c
View File

@ -52,6 +52,7 @@ struct at86rf230_local {
spinlock_t lock;
bool irq_busy;
bool is_tx;
bool tx_aret;
int rssi_base_val;
};
@ -549,7 +550,9 @@ at86rf230_state(struct ieee802154_dev *dev, int state)
} while (val == STATE_TRANSITION_IN_PROGRESS);
if (val == desired_status)
if (val == desired_status ||
(desired_status == STATE_RX_ON && val == STATE_BUSY_RX) ||
(desired_status == STATE_RX_AACK_ON && val == STATE_BUSY_RX_AACK))
return 0;
pr_err("unexpected state change: %d, asked for %d\n", val, state);
@ -570,6 +573,10 @@ at86rf230_start(struct ieee802154_dev *dev)
if (rc)
return rc;
rc = at86rf230_state(dev, STATE_FORCE_TX_ON);
if (rc)
return rc;
return at86rf230_state(dev, STATE_RX_AACK_ON);
}
@ -669,6 +676,12 @@ at86rf230_xmit(struct ieee802154_dev *dev, struct sk_buff *skb)
if (rc)
goto err_rx;
if (lp->tx_aret) {
rc = at86rf230_write_subreg(lp, SR_TRX_CMD, STATE_TX_ARET_ON);
if (rc)
goto err_rx;
}
rc = at86rf230_write_subreg(lp, SR_TRX_CMD, STATE_BUSY_TX);
if (rc)
goto err_rx;
@ -823,6 +836,44 @@ at86rf212_set_cca_ed_level(struct ieee802154_dev *dev, s32 level)
return at86rf230_write_subreg(lp, SR_CCA_ED_THRES, desens_steps);
}
static int
at86rf212_set_csma_params(struct ieee802154_dev *dev, u8 min_be, u8 max_be,
u8 retries)
{
struct at86rf230_local *lp = dev->priv;
int rc;
if (min_be > max_be || max_be > 8 || retries > 5)
return -EINVAL;
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, max_be);
}
static int
at86rf212_set_frame_retries(struct ieee802154_dev *dev, s8 retries)
{
struct at86rf230_local *lp = dev->priv;
int rc = 0;
if (retries < -1 || retries > 15)
return -EINVAL;
lp->tx_aret = retries >= 0;
if (retries >= 0)
rc = at86rf230_write_subreg(lp, SR_MAX_FRAME_RETRIES, retries);
return rc;
}
static struct ieee802154_ops at86rf230_ops = {
.owner = THIS_MODULE,
.xmit = at86rf230_xmit,
@ -845,6 +896,8 @@ static struct ieee802154_ops at86rf212_ops = {
.set_lbt = at86rf212_set_lbt,
.set_cca_mode = at86rf212_set_cca_mode,
.set_cca_ed_level = at86rf212_set_cca_ed_level,
.set_csma_params = at86rf212_set_csma_params,
.set_frame_retries = at86rf212_set_frame_retries,
};
static void at86rf230_irqwork(struct work_struct *work)
@ -921,6 +974,7 @@ static int at86rf230_hw_init(struct at86rf230_local *lp)
struct at86rf230_platform_data *pdata = lp->spi->dev.platform_data;
int rc, irq_pol;
u8 status;
u8 csma_seed[2];
rc = at86rf230_read_subreg(lp, SR_TRX_STATUS, &status);
if (rc)
@ -944,6 +998,14 @@ static int at86rf230_hw_init(struct at86rf230_local *lp)
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, 0x00);
if (rc)