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bluetooth: controller: Move calculation of max_tx_octets to ULL

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Move calculation of max_tx_octets from Nordic lll_conn.c to ULL, to
allow usage by other vendors and prevent duplicate code.

Signed-off-by: Morten Priess <mtpr@oticon.com>
This commit is contained in:
Morten Priess 2019-10-25 13:30:17 +02:00 • committed by Alberto Escolar
commit ca5c829a84
3 changed files with 72 additions and 63 deletions
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70
subsys/bluetooth/controller/ll_sw/ull_conn.c
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@ -1398,6 +1398,76 @@ u8_t ull_conn_llcp_req(void *conn)
return 0;
}
u16_t ull_conn_lll_max_tx_octets_get(struct lll_conn *lll)
{
u16_t max_tx_octets;
#if defined(CONFIG_BT_CTLR_DATA_LENGTH)
#if defined(CONFIG_BT_CTLR_PHY)
switch (lll->phy_tx_time) {
default:
case BIT(0):
/* 1M PHY, 1us = 1 bit, hence divide by 8.
* Deduct 10 bytes for preamble (1), access address (4),
* header (2), and CRC (3).
*/
max_tx_octets = (lll->max_tx_time >> 3) - 10;
break;
case BIT(1):
/* 2M PHY, 1us = 2 bits, hence divide by 4.
* Deduct 11 bytes for preamble (2), access address (4),
* header (2), and CRC (3).
*/
max_tx_octets = (lll->max_tx_time >> 2) - 11;
break;
#if defined(CONFIG_BT_CTLR_PHY_CODED)
case BIT(2):
if (lll->phy_flags & 0x01) {
/* S8 Coded PHY, 8us = 1 bit, hence divide by
* 64.
* Subtract time for preamble (80), AA (256),
* CI (16), TERM1 (24), CRC (192) and
* TERM2 (24), total 592 us.
* Subtract 2 bytes for header.
*/
max_tx_octets = ((lll->max_tx_time - 592) >>
6) - 2;
} else {
/* S2 Coded PHY, 2us = 1 bit, hence divide by
* 16.
* Subtract time for preamble (80), AA (256),
* CI (16), TERM1 (24), CRC (48) and
* TERM2 (6), total 430 us.
* Subtract 2 bytes for header.
*/
max_tx_octets = ((lll->max_tx_time - 430) >>
4) - 2;
}
break;
#endif /* CONFIG_BT_CTLR_PHY_CODED */
}
#if defined(CONFIG_BT_CTLR_LE_ENC)
if (lll->enc_tx) {
/* deduct the MIC */
max_tx_octets -= 4U;
}
#endif /* CONFIG_BT_CTLR_LE_ENC */
if (max_tx_octets > lll->max_tx_octets) {
max_tx_octets = lll->max_tx_octets;
}
#else /* !CONFIG_BT_CTLR_PHY */
max_tx_octets = lll->max_tx_octets;
#endif /* !CONFIG_BT_CTLR_PHY */
#else /* !CONFIG_BT_CTLR_DATA_LENGTH */
max_tx_octets = PDU_DC_PAYLOAD_SIZE_MIN;
#endif /* !CONFIG_BT_CTLR_DATA_LENGTH */
return max_tx_octets;
}
static int init_reset(void)
{
/* Initialize conn pool. */