| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| |
| #include <stdint.h> |
| #include <stdlib.h> |
| #include <assert.h> |
| #include <string.h> |
| #include "sysinit/sysinit.h" |
| #include "syscfg/syscfg.h" |
| #include "os/os.h" |
| #include "os/os_cputime.h" |
| #include "stats/stats.h" |
| #include "nimble/ble.h" |
| #include "nimble/nimble_opt.h" |
| #include "nimble/hci_common.h" |
| #include "nimble/ble_hci_trans.h" |
| #include "controller/ble_hw.h" |
| #include "controller/ble_phy.h" |
| #include "controller/ble_phy_trace.h" |
| #include "controller/ble_ll.h" |
| #include "controller/ble_ll_adv.h" |
| #include "controller/ble_ll_sched.h" |
| #include "controller/ble_ll_scan.h" |
| #include "controller/ble_ll_hci.h" |
| #include "controller/ble_ll_whitelist.h" |
| #include "controller/ble_ll_resolv.h" |
| #include "controller/ble_ll_xcvr.h" |
| #include "controller/ble_ll_trace.h" |
| #include "ble_ll_conn_priv.h" |
| |
| #if MYNEWT_VAL(BLE_LL_DIRECT_TEST_MODE) == 1 |
| #include "ble_ll_dtm_priv.h" |
| #endif |
| |
| /* XXX: |
| * |
| * 1) use the sanity task! |
| * 2) Need to figure out what to do with packets that we hand up that did |
| * not pass the filter policy for the given state. Currently I count all |
| * packets I think. Need to figure out what to do with this. |
| * 3) For the features defined, we need to conditionally compile code. |
| * 4) Should look into always disabled the wfr interrupt if we receive the |
| * start of a frame. Need to look at the various states to see if this is the |
| * right thing to do. |
| */ |
| |
| /* Supported states */ |
| #define BLE_LL_S_NCA (0x00000000001) |
| #define BLE_LL_S_SA (0x00000000002) |
| #define BLE_LL_S_CA (0x00000000004) |
| #define BLE_LL_S_HDCA (0x00000000008) |
| #define BLE_LL_S_PS (0x00000000010) |
| #define BLE_LL_S_AS (0x00000000020) |
| #define BLE_LL_S_INIT (0x00000000040) |
| #define BLE_LL_S_SLAVE (0x00000000080) |
| #define BLE_LL_S_NCA_PS (0x00000000100) |
| #define BLE_LL_S_SA_PS (0x00000000200) |
| #define BLE_LL_S_CA_PS (0x00000000400) |
| #define BLE_LL_S_HDCA_PS (0x00000000800) |
| #define BLE_LL_S_NCA_AS (0x00000001000) |
| #define BLE_LL_S_SA_AS (0x00000002000) |
| #define BLE_LL_S_CA_AS (0x00000004000) |
| #define BLE_LL_S_HDCA_AS (0x00000008000) |
| #define BLE_LL_S_NCA_INIT (0x00000010000) |
| #define BLE_LL_S_SA_INIT (0x00000020000) |
| #define BLE_LL_S_NCA_MASTER (0x00000040000) |
| #define BLE_LL_S_SA_MASTER (0x00000080000) |
| #define BLE_LL_S_NCA_SLAVE (0x00000100000) |
| #define BLE_LL_S_SA_SLAVE (0x00000200000) |
| #define BLE_LL_S_PS_INIT (0x00000400000) |
| #define BLE_LL_S_AS_INIT (0x00000800000) |
| #define BLE_LL_S_PS_MASTER (0x00001000000) |
| #define BLE_LL_S_AS_MASTER (0x00002000000) |
| #define BLE_LL_S_PS_SLAVE (0x00004000000) |
| #define BLE_LL_S_AS_SLAVE (0x00008000000) |
| #define BLE_LL_S_INIT_MASTER (0x00010000000) |
| #define BLE_LL_S_LDCA (0x00020000000) |
| #define BLE_LL_S_LDCA_PS (0x00040000000) |
| #define BLE_LL_S_LDCA_AS (0x00080000000) |
| #define BLE_LL_S_CA_INIT (0x00100000000) |
| #define BLE_LL_S_HDCA_INIT (0x00200000000) |
| #define BLE_LL_S_LDCA_INIT (0x00400000000) |
| #define BLE_LL_S_CA_MASTER (0x00800000000) |
| #define BLE_LL_S_HDCA_MASTER (0x01000000000) |
| #define BLE_LL_S_LDCA_MASTER (0x02000000000) |
| #define BLE_LL_S_CA_SLAVE (0x04000000000) |
| #define BLE_LL_S_HDCA_SLAVE (0x08000000000) |
| #define BLE_LL_S_LDCA_SLAVE (0x10000000000) |
| #define BLE_LL_S_INIT_SLAVE (0x20000000000) |
| |
| #define BLE_LL_SUPPORTED_STATES \ |
| ( \ |
| BLE_LL_S_NCA | \ |
| BLE_LL_S_SA | \ |
| BLE_LL_S_CA | \ |
| BLE_LL_S_HDCA | \ |
| BLE_LL_S_PS | \ |
| BLE_LL_S_AS | \ |
| BLE_LL_S_INIT | \ |
| BLE_LL_S_SLAVE | \ |
| BLE_LL_S_NCA_PS | \ |
| BLE_LL_S_SA_PS | \ |
| BLE_LL_S_CA_PS | \ |
| BLE_LL_S_HDCA_PS | \ |
| BLE_LL_S_NCA_AS | \ |
| BLE_LL_S_SA_AS | \ |
| BLE_LL_S_CA_AS | \ |
| BLE_LL_S_HDCA_AS | \ |
| BLE_LL_S_NCA_INIT | \ |
| BLE_LL_S_SA_INIT | \ |
| BLE_LL_S_NCA_MASTER | \ |
| BLE_LL_S_SA_MASTER | \ |
| BLE_LL_S_NCA_SLAVE | \ |
| BLE_LL_S_SA_SLAVE | \ |
| BLE_LL_S_PS_INIT | \ |
| BLE_LL_S_AS_INIT | \ |
| BLE_LL_S_PS_MASTER | \ |
| BLE_LL_S_AS_MASTER | \ |
| BLE_LL_S_PS_SLAVE | \ |
| BLE_LL_S_AS_SLAVE | \ |
| BLE_LL_S_INIT_MASTER | \ |
| BLE_LL_S_LDCA | \ |
| BLE_LL_S_LDCA_PS | \ |
| BLE_LL_S_LDCA_AS | \ |
| BLE_LL_S_CA_INIT | \ |
| BLE_LL_S_HDCA_INIT | \ |
| BLE_LL_S_LDCA_INIT | \ |
| BLE_LL_S_CA_MASTER | \ |
| BLE_LL_S_HDCA_MASTER | \ |
| BLE_LL_S_LDCA_MASTER | \ |
| BLE_LL_S_CA_SLAVE | \ |
| BLE_LL_S_HDCA_SLAVE | \ |
| BLE_LL_S_LDCA_SLAVE | \ |
| BLE_LL_S_INIT_SLAVE) |
| |
| /* The global BLE LL data object */ |
| struct ble_ll_obj g_ble_ll_data; |
| |
| /* Global link layer statistics */ |
| STATS_SECT_DECL(ble_ll_stats) ble_ll_stats; |
| STATS_NAME_START(ble_ll_stats) |
| STATS_NAME(ble_ll_stats, hci_cmds) |
| STATS_NAME(ble_ll_stats, hci_cmd_errs) |
| STATS_NAME(ble_ll_stats, hci_events_sent) |
| STATS_NAME(ble_ll_stats, bad_ll_state) |
| STATS_NAME(ble_ll_stats, bad_acl_hdr) |
| STATS_NAME(ble_ll_stats, no_bufs) |
| STATS_NAME(ble_ll_stats, rx_adv_pdu_crc_ok) |
| STATS_NAME(ble_ll_stats, rx_adv_pdu_crc_err) |
| STATS_NAME(ble_ll_stats, rx_adv_bytes_crc_ok) |
| STATS_NAME(ble_ll_stats, rx_adv_bytes_crc_err) |
| STATS_NAME(ble_ll_stats, rx_data_pdu_crc_ok) |
| STATS_NAME(ble_ll_stats, rx_data_pdu_crc_err) |
| STATS_NAME(ble_ll_stats, rx_data_bytes_crc_ok) |
| STATS_NAME(ble_ll_stats, rx_data_bytes_crc_err) |
| STATS_NAME(ble_ll_stats, rx_adv_malformed_pkts) |
| STATS_NAME(ble_ll_stats, rx_adv_ind) |
| STATS_NAME(ble_ll_stats, rx_adv_direct_ind) |
| STATS_NAME(ble_ll_stats, rx_adv_nonconn_ind) |
| STATS_NAME(ble_ll_stats, rx_adv_ext_ind) |
| STATS_NAME(ble_ll_stats, rx_scan_reqs) |
| STATS_NAME(ble_ll_stats, rx_scan_rsps) |
| STATS_NAME(ble_ll_stats, rx_connect_reqs) |
| STATS_NAME(ble_ll_stats, rx_scan_ind) |
| STATS_NAME(ble_ll_stats, rx_aux_connect_rsp) |
| STATS_NAME(ble_ll_stats, adv_txg) |
| STATS_NAME(ble_ll_stats, adv_late_starts) |
| STATS_NAME(ble_ll_stats, adv_resched_pdu_fail) |
| STATS_NAME(ble_ll_stats, adv_drop_event) |
| STATS_NAME(ble_ll_stats, sched_state_conn_errs) |
| STATS_NAME(ble_ll_stats, sched_state_adv_errs) |
| STATS_NAME(ble_ll_stats, scan_starts) |
| STATS_NAME(ble_ll_stats, scan_stops) |
| STATS_NAME(ble_ll_stats, scan_req_txf) |
| STATS_NAME(ble_ll_stats, scan_req_txg) |
| STATS_NAME(ble_ll_stats, scan_rsp_txg) |
| STATS_NAME(ble_ll_stats, aux_missed_adv) |
| STATS_NAME(ble_ll_stats, aux_scheduled) |
| STATS_NAME(ble_ll_stats, aux_received) |
| STATS_NAME(ble_ll_stats, aux_fired_for_read) |
| STATS_NAME(ble_ll_stats, aux_conn_req_tx) |
| STATS_NAME(ble_ll_stats, aux_conn_rsp_tx) |
| STATS_NAME(ble_ll_stats, aux_conn_rsp_err) |
| STATS_NAME(ble_ll_stats, aux_scan_req_tx) |
| STATS_NAME(ble_ll_stats, aux_scan_rsp_err) |
| STATS_NAME(ble_ll_stats, aux_chain_cnt) |
| STATS_NAME(ble_ll_stats, aux_chain_err) |
| STATS_NAME(ble_ll_stats, adv_evt_dropped) |
| STATS_NAME(ble_ll_stats, scan_timer_stopped) |
| STATS_NAME(ble_ll_stats, scan_timer_restarted) |
| STATS_NAME_END(ble_ll_stats) |
| |
| static void ble_ll_event_rx_pkt(struct ble_npl_event *ev); |
| static void ble_ll_event_tx_pkt(struct ble_npl_event *ev); |
| static void ble_ll_event_dbuf_overflow(struct ble_npl_event *ev); |
| |
| #if MYNEWT |
| |
| /* The BLE LL task data structure */ |
| #if MYNEWT_VAL(BLE_LL_CFG_FEAT_LL_EXT_ADV) |
| /* TODO: This is for testing. Check it we really need it */ |
| #define BLE_LL_STACK_SIZE (128) |
| #else |
| #define BLE_LL_STACK_SIZE (90) |
| #endif |
| |
| struct os_task g_ble_ll_task; |
| |
| OS_TASK_STACK_DEFINE(g_ble_ll_stack, BLE_LL_STACK_SIZE); |
| |
| #endif /* MYNEWT */ |
| |
| /** Our global device address (public) */ |
| uint8_t g_dev_addr[BLE_DEV_ADDR_LEN]; |
| |
| /** Our random address */ |
| uint8_t g_random_addr[BLE_DEV_ADDR_LEN]; |
| |
| static const uint16_t g_ble_ll_pdu_header_tx_time[BLE_PHY_NUM_MODE] = |
| { |
| [BLE_PHY_MODE_1M] = |
| (BLE_LL_PREAMBLE_LEN + BLE_LL_ACC_ADDR_LEN + BLE_LL_CRC_LEN + |
| BLE_LL_PDU_HDR_LEN) << 3, |
| [BLE_PHY_MODE_2M] = |
| (BLE_LL_PREAMBLE_LEN * 2 + BLE_LL_ACC_ADDR_LEN + BLE_LL_CRC_LEN + |
| BLE_LL_PDU_HDR_LEN) << 2, |
| /* For Coded PHY we have exact TX times provided by specification: |
| * - Preamble, Access Address, CI, TERM1 (always coded as S=8) |
| * - PDU, CRC, TERM2 (coded as S=2 or S=8) |
| * (Vol 6, Part B, 2.2). |
| */ |
| [BLE_PHY_MODE_CODED_125KBPS] = |
| (80 + 256 + 16 + 24 + 8 * (BLE_LL_PDU_HDR_LEN * 8 + 24 + 3)), |
| [BLE_PHY_MODE_CODED_500KBPS] = |
| (80 + 256 + 16 + 24 + 2 * (BLE_LL_PDU_HDR_LEN * 8 + 24 + 3)), |
| }; |
| |
| /** |
| * Counts the number of advertising PDU's received, by type. For advertising |
| * PDU's that contain a destination address, we still count these packets even |
| * if they are not for us. |
| * |
| * @param pdu_type |
| */ |
| static void |
| ble_ll_count_rx_adv_pdus(uint8_t pdu_type) |
| { |
| /* Count received packet types */ |
| switch (pdu_type) { |
| case BLE_ADV_PDU_TYPE_ADV_EXT_IND: |
| STATS_INC(ble_ll_stats, rx_adv_ext_ind); |
| break; |
| case BLE_ADV_PDU_TYPE_ADV_IND: |
| STATS_INC(ble_ll_stats, rx_adv_ind); |
| break; |
| case BLE_ADV_PDU_TYPE_ADV_DIRECT_IND: |
| STATS_INC(ble_ll_stats, rx_adv_direct_ind); |
| break; |
| case BLE_ADV_PDU_TYPE_ADV_NONCONN_IND: |
| STATS_INC(ble_ll_stats, rx_adv_nonconn_ind); |
| break; |
| case BLE_ADV_PDU_TYPE_SCAN_REQ: |
| STATS_INC(ble_ll_stats, rx_scan_reqs); |
| break; |
| case BLE_ADV_PDU_TYPE_SCAN_RSP: |
| STATS_INC(ble_ll_stats, rx_scan_rsps); |
| break; |
| case BLE_ADV_PDU_TYPE_CONNECT_REQ: |
| STATS_INC(ble_ll_stats, rx_connect_reqs); |
| break; |
| case BLE_ADV_PDU_TYPE_AUX_CONNECT_RSP: |
| STATS_INC(ble_ll_stats, rx_aux_connect_rsp); |
| break; |
| case BLE_ADV_PDU_TYPE_ADV_SCAN_IND: |
| STATS_INC(ble_ll_stats, rx_scan_ind); |
| break; |
| default: |
| break; |
| } |
| } |
| |
| /** |
| * Allocate a pdu (chain) for reception. |
| * |
| * @param len |
| * |
| * @return struct os_mbuf* |
| */ |
| struct os_mbuf * |
| ble_ll_rxpdu_alloc(uint16_t len) |
| { |
| uint16_t mb_bytes; |
| struct os_mbuf *m; |
| struct os_mbuf *n; |
| struct os_mbuf *p; |
| struct os_mbuf_pkthdr *pkthdr; |
| |
| p = os_msys_get_pkthdr(len, sizeof(struct ble_mbuf_hdr)); |
| if (!p) { |
| goto rxpdu_alloc_exit; |
| } |
| |
| /* Set packet length */ |
| pkthdr = OS_MBUF_PKTHDR(p); |
| pkthdr->omp_len = len; |
| |
| /* |
| * NOTE: first mbuf in chain will have data pre-pended to it so we adjust |
| * m_data by a word. |
| */ |
| p->om_data += 4; |
| mb_bytes = (p->om_omp->omp_databuf_len - p->om_pkthdr_len - 4); |
| |
| if (mb_bytes < len) { |
| n = p; |
| len -= mb_bytes; |
| while (len) { |
| m = os_msys_get(len, 0); |
| if (!m) { |
| os_mbuf_free_chain(p); |
| p = NULL; |
| goto rxpdu_alloc_exit; |
| } |
| /* Chain new mbuf to existing chain */ |
| SLIST_NEXT(n, om_next) = m; |
| n = m; |
| mb_bytes = m->om_omp->omp_databuf_len; |
| if (mb_bytes >= len) { |
| len = 0; |
| } else { |
| len -= mb_bytes; |
| } |
| } |
| } |
| |
| |
| rxpdu_alloc_exit: |
| if (!p) { |
| STATS_INC(ble_ll_stats, no_bufs); |
| } |
| return p; |
| } |
| |
| int |
| ble_ll_chk_txrx_octets(uint16_t octets) |
| { |
| int rc; |
| |
| if ((octets < BLE_LL_CONN_SUPP_BYTES_MIN) || |
| (octets > BLE_LL_CONN_SUPP_BYTES_MAX)) { |
| rc = 0; |
| } else { |
| rc = 1; |
| } |
| |
| return rc; |
| } |
| |
| int |
| ble_ll_chk_txrx_time(uint16_t time) |
| { |
| int rc; |
| |
| if ((time < BLE_LL_CONN_SUPP_TIME_MIN) || |
| (time > BLE_LL_CONN_SUPP_TIME_MAX)) { |
| rc = 0; |
| } else { |
| rc = 1; |
| } |
| |
| return rc; |
| } |
| |
| /** |
| * Checks to see if the address is a resolvable private address. |
| * |
| * NOTE: the addr_type parameter will be 0 if the address is public; |
| * any other value is random (all non-zero values). |
| * |
| * @param addr |
| * @param addr_type Public (zero) or Random (non-zero) address |
| * |
| * @return int |
| */ |
| int |
| ble_ll_is_rpa(uint8_t *addr, uint8_t addr_type) |
| { |
| int rc; |
| |
| if (addr_type && ((addr[5] & 0xc0) == 0x40)) { |
| rc = 1; |
| } else { |
| rc = 0; |
| } |
| return rc; |
| } |
| |
| /* Checks to see that the device is a valid random address */ |
| int |
| ble_ll_is_valid_random_addr(uint8_t *addr) |
| { |
| int i; |
| int rc; |
| uint16_t sum; |
| uint8_t addr_type; |
| |
| /* Make sure all bits are neither one nor zero */ |
| sum = 0; |
| for (i = 0; i < (BLE_DEV_ADDR_LEN -1); ++i) { |
| sum += addr[i]; |
| } |
| sum += addr[5] & 0x3f; |
| |
| if ((sum == 0) || (sum == ((5*255) + 0x3f))) { |
| return 0; |
| } |
| |
| /* Get the upper two bits of the address */ |
| rc = 1; |
| addr_type = addr[5] & 0xc0; |
| if (addr_type == 0xc0) { |
| /* Static random address. No other checks needed */ |
| } else if (addr_type == 0x40) { |
| /* Resolvable */ |
| sum = addr[3] + addr[4] + (addr[5] & 0x3f); |
| if ((sum == 0) || (sum == (255 + 255 + 0x3f))) { |
| rc = 0; |
| } |
| } else if (addr_type == 0) { |
| /* non-resolvable. Cant be equal to public */ |
| if (!memcmp(g_dev_addr, addr, BLE_DEV_ADDR_LEN)) { |
| rc = 0; |
| } |
| } else { |
| /* Invalid upper two bits */ |
| rc = 0; |
| } |
| |
| return rc; |
| } |
| |
| /** |
| * Called from the HCI command parser when the set random address command |
| * is received. |
| * |
| * Context: Link Layer task (HCI command parser) |
| * |
| * @param addr Pointer to address |
| * |
| * @return int 0: success |
| */ |
| int |
| ble_ll_set_random_addr(uint8_t *addr, bool hci_adv_ext) |
| { |
| /* If the Host issues this command when scanning or legacy advertising is |
| * enabled, the Controller shall return the error code Command Disallowed. |
| * |
| * Test specification extends this also to initiating. |
| */ |
| |
| if (g_ble_ll_conn_create_sm || ble_ll_scan_enabled() || |
| (!hci_adv_ext && ble_ll_adv_enabled())) { |
| return BLE_ERR_CMD_DISALLOWED; |
| } |
| |
| if (!ble_ll_is_valid_random_addr(addr)) { |
| return BLE_ERR_INV_HCI_CMD_PARMS; |
| } |
| |
| memcpy(g_random_addr, addr, BLE_DEV_ADDR_LEN); |
| |
| #if MYNEWT_VAL(BLE_LL_CFG_FEAT_LL_EXT_ADV) |
| /* For instance 0 we need same address if legacy advertising might be |
| * used. If extended advertising is in use than this command doesn't |
| * affect instance 0. |
| */ |
| if (!hci_adv_ext) |
| ble_ll_adv_set_random_addr(addr, 0); |
| #endif |
| |
| return BLE_ERR_SUCCESS; |
| } |
| |
| /** |
| * Checks to see if an address is our device address (either public or |
| * random) |
| * |
| * @param addr |
| * @param addr_type |
| * |
| * @return int 0: not our device address. 1: is our device address |
| */ |
| int |
| ble_ll_is_our_devaddr(uint8_t *addr, int addr_type) |
| { |
| int rc; |
| uint8_t *our_addr; |
| |
| if (addr_type) { |
| our_addr = g_random_addr; |
| } else { |
| our_addr = g_dev_addr; |
| } |
| |
| rc = 0; |
| if (!memcmp(our_addr, addr, BLE_DEV_ADDR_LEN)) { |
| rc = 1; |
| } |
| |
| return rc; |
| } |
| |
| /** |
| * Get identity address |
| * |
| * @param addr_type Random (1). Public(0) |
| * |
| * @return pointer to identity address of given type. |
| */ |
| uint8_t* |
| ble_ll_get_our_devaddr(uint8_t addr_type) |
| { |
| if (addr_type) { |
| return g_random_addr; |
| } |
| |
| return g_dev_addr; |
| } |
| |
| /** |
| * Wait for response timeout function |
| * |
| * Context: interrupt (ble scheduler) |
| * |
| * @param arg |
| */ |
| void |
| ble_ll_wfr_timer_exp(void *arg) |
| { |
| int rx_start; |
| uint8_t lls; |
| |
| rx_start = ble_phy_rx_started(); |
| lls = g_ble_ll_data.ll_state; |
| |
| ble_ll_trace_u32x3(BLE_LL_TRACE_ID_WFR_EXP, lls, ble_phy_xcvr_state_get(), |
| (uint32_t)rx_start); |
| |
| /* If we have started a reception, there is nothing to do here */ |
| if (!rx_start) { |
| switch (lls) { |
| case BLE_LL_STATE_ADV: |
| ble_ll_adv_wfr_timer_exp(); |
| break; |
| case BLE_LL_STATE_CONNECTION: |
| ble_ll_conn_wfr_timer_exp(); |
| break; |
| case BLE_LL_STATE_SCANNING: |
| ble_ll_scan_wfr_timer_exp(); |
| break; |
| case BLE_LL_STATE_INITIATING: |
| ble_ll_conn_init_wfr_timer_exp(); |
| break; |
| #if MYNEWT_VAL(BLE_LL_DIRECT_TEST_MODE) == 1 |
| case BLE_LL_STATE_DTM: |
| ble_ll_dtm_wfr_timer_exp(); |
| break; |
| #endif |
| default: |
| break; |
| } |
| } |
| } |
| |
| /** |
| * Enable the wait for response timer. |
| * |
| * Context: Interrupt. |
| * |
| * @param cputime |
| * @param wfr_cb |
| * @param arg |
| */ |
| void |
| ble_ll_wfr_enable(uint32_t cputime) |
| { |
| } |
| |
| /** |
| * Disable the wait for response timer |
| */ |
| void |
| ble_ll_wfr_disable(void) |
| { |
| } |
| |
| /** |
| * ll tx pkt in proc |
| * |
| * Process ACL data packet input from host |
| * |
| * Context: Link layer task |
| * |
| */ |
| static void |
| ble_ll_tx_pkt_in(void) |
| { |
| uint16_t handle; |
| uint16_t length; |
| uint16_t pb; |
| struct os_mbuf_pkthdr *pkthdr; |
| struct os_mbuf *om; |
| |
| /* Drain all packets off the queue */ |
| while (STAILQ_FIRST(&g_ble_ll_data.ll_tx_pkt_q)) { |
| /* Get mbuf pointer from packet header pointer */ |
| pkthdr = STAILQ_FIRST(&g_ble_ll_data.ll_tx_pkt_q); |
| om = (struct os_mbuf *)((uint8_t *)pkthdr - sizeof(struct os_mbuf)); |
| |
| /* Remove from queue */ |
| STAILQ_REMOVE_HEAD(&g_ble_ll_data.ll_tx_pkt_q, omp_next); |
| |
| /* Strip HCI ACL header to get handle and length */ |
| handle = get_le16(om->om_data); |
| length = get_le16(om->om_data + 2); |
| os_mbuf_adj(om, sizeof(struct hci_data_hdr)); |
| |
| /* Do some basic error checking */ |
| pb = handle & 0x3000; |
| if ((pkthdr->omp_len != length) || (pb > 0x1000) || (length == 0)) { |
| /* This is a bad ACL packet. Count a stat and free it */ |
| STATS_INC(ble_ll_stats, bad_acl_hdr); |
| os_mbuf_free_chain(om); |
| continue; |
| } |
| |
| /* Hand to connection state machine */ |
| ble_ll_conn_tx_pkt_in(om, handle, length); |
| } |
| } |
| |
| /** |
| * Count Link Layer statistics for received PDUs |
| * |
| * Context: Link layer task |
| * |
| * @param hdr |
| * @param len |
| */ |
| static void |
| ble_ll_count_rx_stats(struct ble_mbuf_hdr *hdr, uint16_t len, uint8_t pdu_type) |
| { |
| uint8_t crcok; |
| bool connection_data; |
| |
| crcok = BLE_MBUF_HDR_CRC_OK(hdr); |
| connection_data = (BLE_MBUF_HDR_RX_STATE(hdr) == BLE_LL_STATE_CONNECTION); |
| |
| #if MYNEWT_VAL(BLE_LL_DIRECT_TEST_MODE) == 1 |
| /* Reuse connection stats for DTM */ |
| connection_data = (BLE_MBUF_HDR_RX_STATE(hdr) == BLE_LL_STATE_DTM); |
| #endif |
| |
| if (crcok) { |
| if (connection_data) { |
| STATS_INC(ble_ll_stats, rx_data_pdu_crc_ok); |
| STATS_INCN(ble_ll_stats, rx_data_bytes_crc_ok, len); |
| } else { |
| STATS_INC(ble_ll_stats, rx_adv_pdu_crc_ok); |
| STATS_INCN(ble_ll_stats, rx_adv_bytes_crc_ok, len); |
| ble_ll_count_rx_adv_pdus(pdu_type); |
| } |
| } else { |
| if (connection_data) { |
| STATS_INC(ble_ll_stats, rx_data_pdu_crc_err); |
| STATS_INCN(ble_ll_stats, rx_data_bytes_crc_err, len); |
| } else { |
| STATS_INC(ble_ll_stats, rx_adv_pdu_crc_err); |
| STATS_INCN(ble_ll_stats, rx_adv_bytes_crc_err, len); |
| } |
| } |
| } |
| |
| /** |
| * ll rx pkt in |
| * |
| * Process received packet from PHY. |
| * |
| * Context: Link layer task |
| * |
| */ |
| static void |
| ble_ll_rx_pkt_in(void) |
| { |
| os_sr_t sr; |
| uint8_t pdu_type; |
| uint8_t *rxbuf; |
| struct os_mbuf_pkthdr *pkthdr; |
| struct ble_mbuf_hdr *ble_hdr; |
| struct os_mbuf *m; |
| |
| /* Drain all packets off the queue */ |
| while (STAILQ_FIRST(&g_ble_ll_data.ll_rx_pkt_q)) { |
| /* Get mbuf pointer from packet header pointer */ |
| pkthdr = STAILQ_FIRST(&g_ble_ll_data.ll_rx_pkt_q); |
| m = (struct os_mbuf *)((uint8_t *)pkthdr - sizeof(struct os_mbuf)); |
| |
| /* Remove from queue */ |
| OS_ENTER_CRITICAL(sr); |
| STAILQ_REMOVE_HEAD(&g_ble_ll_data.ll_rx_pkt_q, omp_next); |
| OS_EXIT_CRITICAL(sr); |
| |
| /* Note: pdu type wont get used unless this is an advertising pdu */ |
| ble_hdr = BLE_MBUF_HDR_PTR(m); |
| rxbuf = m->om_data; |
| pdu_type = rxbuf[0] & BLE_ADV_PDU_HDR_TYPE_MASK; |
| ble_ll_count_rx_stats(ble_hdr, pkthdr->omp_len, pdu_type); |
| |
| /* Process the data or advertising pdu */ |
| /* Process the PDU */ |
| switch (BLE_MBUF_HDR_RX_STATE(ble_hdr)) { |
| case BLE_LL_STATE_CONNECTION: |
| ble_ll_conn_rx_data_pdu(m, ble_hdr); |
| /* m is going to be free by function above */ |
| m = NULL; |
| break; |
| case BLE_LL_STATE_ADV: |
| ble_ll_adv_rx_pkt_in(pdu_type, rxbuf, ble_hdr); |
| break; |
| case BLE_LL_STATE_SCANNING: |
| ble_ll_scan_rx_pkt_in(pdu_type, m, ble_hdr); |
| break; |
| case BLE_LL_STATE_INITIATING: |
| ble_ll_init_rx_pkt_in(pdu_type, rxbuf, ble_hdr); |
| break; |
| #if MYNEWT_VAL(BLE_LL_DIRECT_TEST_MODE) == 1 |
| case BLE_LL_STATE_DTM: |
| ble_ll_dtm_rx_pkt_in(m, ble_hdr); |
| break; |
| #endif |
| default: |
| /* Any other state should never occur */ |
| STATS_INC(ble_ll_stats, bad_ll_state); |
| break; |
| } |
| if (m) { |
| /* Free the packet buffer */ |
| os_mbuf_free_chain(m); |
| } |
| } |
| } |
| |
| /** |
| * Called to put a packet on the Link Layer receive packet queue. |
| * |
| * @param rxpdu Pointer to received PDU |
| */ |
| void |
| ble_ll_rx_pdu_in(struct os_mbuf *rxpdu) |
| { |
| struct os_mbuf_pkthdr *pkthdr; |
| |
| pkthdr = OS_MBUF_PKTHDR(rxpdu); |
| STAILQ_INSERT_TAIL(&g_ble_ll_data.ll_rx_pkt_q, pkthdr, omp_next); |
| ble_npl_eventq_put(&g_ble_ll_data.ll_evq, &g_ble_ll_data.ll_rx_pkt_ev); |
| } |
| |
| /** |
| * Called to put a packet on the Link Layer transmit packet queue. |
| * |
| * @param txpdu Pointer to transmit packet |
| */ |
| void |
| ble_ll_acl_data_in(struct os_mbuf *txpkt) |
| { |
| os_sr_t sr; |
| struct os_mbuf_pkthdr *pkthdr; |
| |
| pkthdr = OS_MBUF_PKTHDR(txpkt); |
| OS_ENTER_CRITICAL(sr); |
| STAILQ_INSERT_TAIL(&g_ble_ll_data.ll_tx_pkt_q, pkthdr, omp_next); |
| OS_EXIT_CRITICAL(sr); |
| ble_npl_eventq_put(&g_ble_ll_data.ll_evq, &g_ble_ll_data.ll_tx_pkt_ev); |
| } |
| |
| /** |
| * Called to post event to Link Layer when a data buffer overflow has |
| * occurred. |
| * |
| * Context: Interrupt |
| * |
| */ |
| void |
| ble_ll_data_buffer_overflow(void) |
| { |
| ble_npl_eventq_put(&g_ble_ll_data.ll_evq, &g_ble_ll_data.ll_dbuf_overflow_ev); |
| } |
| |
| /** |
| * Called when a HW error occurs. |
| * |
| * Context: Interrupt |
| */ |
| void |
| ble_ll_hw_error(void) |
| { |
| ble_npl_callout_reset(&g_ble_ll_data.ll_hw_err_timer, 0); |
| } |
| |
| /** |
| * Called when the HW error timer expires. |
| * |
| * @param arg |
| */ |
| static void |
| ble_ll_hw_err_timer_cb(struct ble_npl_event *ev) |
| { |
| if (ble_ll_hci_ev_hw_err(BLE_HW_ERR_HCI_SYNC_LOSS)) { |
| /* |
| * Restart callout if failed to allocate event. Try to allocate an |
| * event every 50 milliseconds (or each OS tick if a tick is longer |
| * than 100 msecs). |
| */ |
| ble_npl_callout_reset(&g_ble_ll_data.ll_hw_err_timer, |
| ble_npl_time_ms_to_ticks32(50)); |
| } |
| } |
| |
| /** |
| * Called upon start of received PDU |
| * |
| * Context: Interrupt |
| * |
| * @param rxpdu |
| * chan |
| * |
| * @return int |
| * < 0: A frame we dont want to receive. |
| * = 0: Continue to receive frame. Dont go from rx to tx |
| * > 0: Continue to receive frame and go from rx to tx when done |
| */ |
| int |
| ble_ll_rx_start(uint8_t *rxbuf, uint8_t chan, struct ble_mbuf_hdr *rxhdr) |
| { |
| int rc; |
| uint8_t pdu_type; |
| |
| /* Advertising channel PDU */ |
| pdu_type = rxbuf[0] & BLE_ADV_PDU_HDR_TYPE_MASK; |
| |
| ble_ll_trace_u32x2(BLE_LL_TRACE_ID_RX_START, g_ble_ll_data.ll_state, |
| pdu_type); |
| |
| switch (g_ble_ll_data.ll_state) { |
| case BLE_LL_STATE_CONNECTION: |
| rc = ble_ll_conn_rx_isr_start(rxhdr, ble_phy_access_addr_get()); |
| break; |
| case BLE_LL_STATE_ADV: |
| rc = ble_ll_adv_rx_isr_start(pdu_type); |
| break; |
| case BLE_LL_STATE_INITIATING: |
| rc = ble_ll_init_rx_isr_start(pdu_type, rxhdr); |
| break; |
| case BLE_LL_STATE_SCANNING: |
| rc = ble_ll_scan_rx_isr_start(pdu_type, &rxhdr->rxinfo.flags); |
| break; |
| #if MYNEWT_VAL(BLE_LL_DIRECT_TEST_MODE) == 1 |
| case BLE_LL_STATE_DTM: |
| rc = ble_ll_dtm_rx_isr_start(rxhdr, ble_phy_access_addr_get()); |
| break; |
| #endif |
| default: |
| /* Should not be in this state! */ |
| rc = -1; |
| STATS_INC(ble_ll_stats, bad_ll_state); |
| break; |
| } |
| |
| return rc; |
| } |
| |
| /** |
| * Called by the PHY when a receive packet has ended. |
| * |
| * NOTE: Called from interrupt context! |
| * |
| * @param rxbuf Pointer to received PDU data |
| * rxhdr Pointer to BLE header of received mbuf |
| * |
| * @return int |
| * < 0: Disable the phy after reception. |
| * == 0: Success. Do not disable the PHY. |
| * > 0: Do not disable PHY as that has already been done. |
| */ |
| int |
| ble_ll_rx_end(uint8_t *rxbuf, struct ble_mbuf_hdr *rxhdr) |
| { |
| int rc; |
| int badpkt; |
| uint8_t pdu_type; |
| uint8_t len; |
| uint8_t crcok; |
| struct os_mbuf *rxpdu; |
| |
| /* Get CRC status from BLE header */ |
| crcok = BLE_MBUF_HDR_CRC_OK(rxhdr); |
| |
| /* Get advertising PDU type and length */ |
| pdu_type = rxbuf[0] & BLE_ADV_PDU_HDR_TYPE_MASK; |
| len = rxbuf[1]; |
| |
| ble_ll_trace_u32x3(BLE_LL_TRACE_ID_RX_END, pdu_type, len, |
| rxhdr->rxinfo.flags); |
| |
| #if MYNEWT_VAL(BLE_LL_DIRECT_TEST_MODE) == 1 |
| if (BLE_MBUF_HDR_RX_STATE(rxhdr) == BLE_LL_STATE_DTM) { |
| rc = ble_ll_dtm_rx_isr_end(rxbuf, rxhdr); |
| return rc; |
| } |
| #endif |
| |
| if (BLE_MBUF_HDR_RX_STATE(rxhdr) == BLE_LL_STATE_CONNECTION) { |
| rc = ble_ll_conn_rx_isr_end(rxbuf, rxhdr); |
| return rc; |
| } |
| |
| /* If the CRC checks, make sure lengths check! */ |
| badpkt = 0; |
| if (crcok) { |
| switch (pdu_type) { |
| case BLE_ADV_PDU_TYPE_SCAN_REQ: |
| case BLE_ADV_PDU_TYPE_ADV_DIRECT_IND: |
| if (len != BLE_SCAN_REQ_LEN) { |
| badpkt = 1; |
| } |
| break; |
| case BLE_ADV_PDU_TYPE_SCAN_RSP: |
| case BLE_ADV_PDU_TYPE_ADV_IND: |
| case BLE_ADV_PDU_TYPE_ADV_SCAN_IND: |
| case BLE_ADV_PDU_TYPE_ADV_NONCONN_IND: |
| if ((len < BLE_DEV_ADDR_LEN) || (len > BLE_ADV_SCAN_IND_MAX_LEN)) { |
| badpkt = 1; |
| } |
| break; |
| case BLE_ADV_PDU_TYPE_AUX_CONNECT_RSP: |
| break; |
| case BLE_ADV_PDU_TYPE_ADV_EXT_IND: |
| break; |
| case BLE_ADV_PDU_TYPE_CONNECT_REQ: |
| if (len != BLE_CONNECT_REQ_LEN) { |
| badpkt = 1; |
| } |
| break; |
| default: |
| badpkt = 1; |
| break; |
| } |
| |
| /* If this is a malformed packet, just kill it here */ |
| if (badpkt) { |
| STATS_INC(ble_ll_stats, rx_adv_malformed_pkts); |
| } |
| } |
| |
| /* Hand packet to the appropriate state machine (if crc ok) */ |
| rxpdu = NULL; |
| switch (BLE_MBUF_HDR_RX_STATE(rxhdr)) { |
| case BLE_LL_STATE_ADV: |
| if (!badpkt) { |
| rxpdu = ble_ll_rxpdu_alloc(len + BLE_LL_PDU_HDR_LEN); |
| if (rxpdu) { |
| ble_phy_rxpdu_copy(rxbuf, rxpdu); |
| } |
| } |
| rc = ble_ll_adv_rx_isr_end(pdu_type, rxpdu, crcok); |
| break; |
| case BLE_LL_STATE_SCANNING: |
| if (!badpkt) { |
| rxpdu = ble_ll_rxpdu_alloc(len + BLE_LL_PDU_HDR_LEN); |
| if (rxpdu) { |
| ble_phy_rxpdu_copy(rxbuf, rxpdu); |
| } |
| } |
| rc = ble_ll_scan_rx_isr_end(rxpdu, crcok); |
| break; |
| case BLE_LL_STATE_INITIATING: |
| rc = ble_ll_init_rx_isr_end(rxbuf, crcok, rxhdr); |
| break; |
| default: |
| rc = -1; |
| STATS_INC(ble_ll_stats, bad_ll_state); |
| break; |
| } |
| |
| /* Hand packet up to higher layer (regardless of CRC failure) */ |
| if (rxpdu) { |
| ble_ll_rx_pdu_in(rxpdu); |
| } |
| |
| return rc; |
| } |
| |
| uint8_t |
| ble_ll_tx_mbuf_pducb(uint8_t *dptr, void *pducb_arg, uint8_t *hdr_byte) |
| { |
| struct os_mbuf *txpdu; |
| struct ble_mbuf_hdr *ble_hdr; |
| |
| txpdu = pducb_arg; |
| BLE_LL_ASSERT(txpdu); |
| ble_hdr = BLE_MBUF_HDR_PTR(txpdu); |
| |
| os_mbuf_copydata(txpdu, ble_hdr->txinfo.offset, ble_hdr->txinfo.pyld_len, |
| dptr); |
| |
| *hdr_byte = ble_hdr->txinfo.hdr_byte; |
| |
| return ble_hdr->txinfo.pyld_len; |
| } |
| |
| uint8_t |
| ble_ll_tx_flat_mbuf_pducb(uint8_t *dptr, void *pducb_arg, uint8_t *hdr_byte) |
| { |
| struct os_mbuf *txpdu; |
| struct ble_mbuf_hdr *ble_hdr; |
| |
| txpdu = pducb_arg; |
| BLE_LL_ASSERT(txpdu); |
| ble_hdr = BLE_MBUF_HDR_PTR(txpdu); |
| |
| memcpy(dptr, txpdu->om_data, ble_hdr->txinfo.pyld_len); |
| |
| *hdr_byte = ble_hdr->txinfo.hdr_byte; |
| |
| return ble_hdr->txinfo.pyld_len; |
| } |
| |
| static void |
| ble_ll_event_rx_pkt(struct ble_npl_event *ev) |
| { |
| ble_ll_rx_pkt_in(); |
| } |
| |
| static void |
| ble_ll_event_tx_pkt(struct ble_npl_event *ev) |
| { |
| ble_ll_tx_pkt_in(); |
| } |
| |
| static void |
| ble_ll_event_dbuf_overflow(struct ble_npl_event *ev) |
| { |
| ble_ll_hci_ev_databuf_overflow(); |
| } |
| |
| static void |
| ble_ll_event_comp_pkts(struct ble_npl_event *ev) |
| { |
| ble_ll_conn_num_comp_pkts_event_send(NULL); |
| } |
| |
| /** |
| * Link Layer task. |
| * |
| * This is the task that runs the Link Layer. |
| * |
| * @param arg |
| */ |
| void |
| ble_ll_task(void *arg) |
| { |
| struct ble_npl_event *ev; |
| |
| /* |
| * XXX RIOT ties event queue to a thread which initialized it so we need to |
| * create event queue in LL task, not in general init function. This can |
| * lead to some races between host and LL so for now let us have it as a |
| * hack for RIOT where races can be avoided by proper initialization inside |
| * package. |
| */ |
| #ifdef RIOT_VERSION |
| ble_npl_eventq_init(&g_ble_ll_data.ll_evq); |
| #endif |
| |
| /* Init ble phy */ |
| ble_phy_init(); |
| |
| /* Set output power to 1mW (0 dBm) */ |
| ble_phy_txpwr_set(MYNEWT_VAL(BLE_LL_TX_PWR_DBM)); |
| |
| /* Tell the host that we are ready to receive packets */ |
| ble_ll_hci_send_noop(); |
| |
| ble_ll_rand_start(); |
| |
| while (1) { |
| ev = ble_npl_eventq_get(&g_ble_ll_data.ll_evq, BLE_NPL_TIME_FOREVER); |
| assert(ev); |
| ble_npl_event_run(ev); |
| } |
| } |
| |
| /** |
| * ble ll state set |
| * |
| * Called to set the current link layer state. |
| * |
| * Context: Interrupt and Link Layer task |
| * |
| * @param ll_state |
| */ |
| void |
| ble_ll_state_set(uint8_t ll_state) |
| { |
| g_ble_ll_data.ll_state = ll_state; |
| } |
| |
| /** |
| * ble ll state get |
| * |
| * Called to get the current link layer state. |
| * |
| * Context: Link Layer task (can be called from interrupt context though). |
| * |
| * @return ll_state |
| */ |
| uint8_t |
| ble_ll_state_get(void) |
| { |
| return g_ble_ll_data.ll_state; |
| } |
| |
| /** |
| * ble ll event send |
| * |
| * Send an event to the Link Layer task |
| * |
| * @param ev Event to add to the Link Layer event queue. |
| */ |
| void |
| ble_ll_event_send(struct ble_npl_event *ev) |
| { |
| ble_npl_eventq_put(&g_ble_ll_data.ll_evq, ev); |
| } |
| |
| /** |
| * Returns the features supported by the link layer |
| * |
| * @return uint8_t bitmask of supported features. |
| */ |
| uint64_t |
| ble_ll_read_supp_states(void) |
| { |
| return BLE_LL_SUPPORTED_STATES; |
| } |
| |
| /** |
| * Returns the features supported by the link layer |
| * |
| * @return uint32_t bitmask of supported features. |
| */ |
| uint32_t |
| ble_ll_read_supp_features(void) |
| { |
| return g_ble_ll_data.ll_supp_features; |
| } |
| |
| /** |
| * Flush a link layer packet queue. |
| * |
| * @param pktq |
| */ |
| static void |
| ble_ll_flush_pkt_queue(struct ble_ll_pkt_q *pktq) |
| { |
| struct os_mbuf_pkthdr *pkthdr; |
| struct os_mbuf *om; |
| |
| /* FLush all packets from Link layer queues */ |
| while (STAILQ_FIRST(pktq)) { |
| /* Get mbuf pointer from packet header pointer */ |
| pkthdr = STAILQ_FIRST(pktq); |
| om = OS_MBUF_PKTHDR_TO_MBUF(pkthdr); |
| |
| /* Remove from queue and free the mbuf */ |
| STAILQ_REMOVE_HEAD(pktq, omp_next); |
| os_mbuf_free_chain(om); |
| } |
| } |
| |
| /** |
| * Called to initialize a mbuf used by the controller |
| * |
| * NOTE: this is only used when the mbuf is created by the controller; |
| * it should not be used for data packets (ACL data packets) that come from |
| * the host. This routine assumes that the entire pdu length can fit in |
| * one mbuf contiguously. |
| * |
| * @param m |
| * @param pdulen |
| * @param hdr |
| */ |
| void |
| ble_ll_mbuf_init(struct os_mbuf *m, uint8_t pdulen, uint8_t hdr) |
| { |
| struct ble_mbuf_hdr *ble_hdr; |
| |
| /* Set mbuf length and packet length */ |
| m->om_len = pdulen; |
| OS_MBUF_PKTHDR(m)->omp_len = pdulen; |
| |
| /* Set BLE transmit header */ |
| ble_hdr = BLE_MBUF_HDR_PTR(m); |
| ble_hdr->txinfo.flags = 0; |
| ble_hdr->txinfo.offset = 0; |
| ble_hdr->txinfo.pyld_len = pdulen; |
| ble_hdr->txinfo.hdr_byte = hdr; |
| } |
| |
| /** |
| * Called to reset the controller. This performs a "software reset" of the link |
| * layer; it does not perform a HW reset of the controller nor does it reset |
| * the HCI interface. |
| * |
| * Context: Link Layer task (HCI command) |
| * |
| * @return int The ble error code to place in the command complete event that |
| * is returned when this command is issued. |
| */ |
| int |
| ble_ll_reset(void) |
| { |
| int rc; |
| os_sr_t sr; |
| |
| /* Stop the phy */ |
| ble_phy_disable(); |
| |
| /* Stop any wait for response timer */ |
| OS_ENTER_CRITICAL(sr); |
| ble_ll_wfr_disable(); |
| ble_ll_sched_stop(); |
| OS_EXIT_CRITICAL(sr); |
| |
| /* Stop any scanning */ |
| ble_ll_scan_reset(); |
| |
| /* Stop any advertising */ |
| ble_ll_adv_reset(); |
| |
| #if MYNEWT_VAL(BLE_LL_DIRECT_TEST_MODE) |
| ble_ll_dtm_reset(); |
| #endif |
| |
| /* FLush all packets from Link layer queues */ |
| ble_ll_flush_pkt_queue(&g_ble_ll_data.ll_tx_pkt_q); |
| ble_ll_flush_pkt_queue(&g_ble_ll_data.ll_rx_pkt_q); |
| |
| /* Reset LL stats */ |
| STATS_RESET(ble_ll_stats); |
| |
| /* Reset any preferred PHYs */ |
| g_ble_ll_data.ll_pref_tx_phys = 0; |
| g_ble_ll_data.ll_pref_rx_phys = 0; |
| |
| /* Reset connection module */ |
| ble_ll_conn_module_reset(); |
| |
| /* All this does is re-initialize the event masks so call the hci init */ |
| ble_ll_hci_init(); |
| |
| /* Reset scheduler */ |
| ble_ll_sched_init(); |
| |
| /* Set state to standby */ |
| ble_ll_state_set(BLE_LL_STATE_STANDBY); |
| |
| #ifdef BLE_XCVR_RFCLK |
| /* Stops rf clock and rfclock timer */ |
| ble_ll_xcvr_rfclk_stop(); |
| #endif |
| |
| /* Reset our random address */ |
| memset(g_random_addr, 0, BLE_DEV_ADDR_LEN); |
| |
| /* Clear the whitelist */ |
| ble_ll_whitelist_clear(); |
| |
| /* Reset resolving list */ |
| #if (MYNEWT_VAL(BLE_LL_CFG_FEAT_LL_PRIVACY) == 1) |
| ble_ll_resolv_list_reset(); |
| #endif |
| |
| /* Re-initialize the PHY */ |
| rc = ble_phy_init(); |
| |
| return rc; |
| } |
| |
| static void |
| ble_ll_seed_prng(void) |
| { |
| uint32_t seed; |
| int i; |
| |
| /* Seed random number generator with least significant bytes of device |
| * address. |
| */ |
| seed = 0; |
| for (i = 0; i < 4; ++i) { |
| seed |= g_dev_addr[i]; |
| seed <<= 8; |
| } |
| srand(seed); |
| } |
| |
| uint32_t |
| ble_ll_pdu_tx_time_get(uint16_t payload_len, int phy_mode) |
| { |
| uint32_t usecs; |
| |
| #if (BLE_LL_BT5_PHY_SUPPORTED) |
| if (phy_mode == BLE_PHY_MODE_1M) { |
| /* 8 usecs per byte */ |
| usecs = payload_len << 3; |
| } else if (phy_mode == BLE_PHY_MODE_2M) { |
| /* 4 usecs per byte */ |
| usecs = payload_len << 2; |
| } else if (phy_mode == BLE_PHY_MODE_CODED_125KBPS) { |
| /* S=8 => 8 * 8 = 64 usecs per byte */ |
| usecs = payload_len << 6; |
| } else if (phy_mode == BLE_PHY_MODE_CODED_500KBPS) { |
| /* S=2 => 2 * 8 = 16 usecs per byte */ |
| usecs = payload_len << 4; |
| } else { |
| BLE_LL_ASSERT(0); |
| } |
| |
| usecs += g_ble_ll_pdu_header_tx_time[phy_mode]; |
| #else |
| usecs = (((payload_len) + BLE_LL_PDU_HDR_LEN + BLE_LL_ACC_ADDR_LEN |
| + BLE_LL_PREAMBLE_LEN + BLE_LL_CRC_LEN) << 3); |
| #endif |
| |
| return usecs; |
| } |
| |
| uint16_t |
| ble_ll_pdu_max_tx_octets_get(uint32_t usecs, int phy_mode) |
| { |
| uint32_t header_tx_time; |
| uint16_t octets; |
| |
| BLE_LL_ASSERT(phy_mode < BLE_PHY_NUM_MODE); |
| |
| header_tx_time = g_ble_ll_pdu_header_tx_time[phy_mode]; |
| |
| /* |
| * Current conn max tx time can be too short to even send a packet header |
| * and this can happen if we changed connection form uncoded to coded phy. |
| * However, the lower bound for conn max tx time (all of them) depends on |
| * current phy (uncoded/coded) but it always allows to send at least 27 |
| * bytes of payload thus we alwyas return at least 27 from here. |
| * |
| * Reference: |
| * Core v5.0, Vol 6, Part B, section 4.5.10 |
| * see connEffectiveMaxTxTime and connEffectiveMaxRxTime definitions |
| */ |
| |
| if (usecs < header_tx_time) { |
| return 27; |
| } |
| |
| usecs -= header_tx_time; |
| |
| if (phy_mode == BLE_PHY_MODE_1M) { |
| /* 8 usecs per byte */ |
| octets = usecs >> 3; |
| } else if (phy_mode == BLE_PHY_MODE_2M) { |
| /* 4 usecs per byte */ |
| octets = usecs >> 2; |
| } else if (phy_mode == BLE_PHY_MODE_CODED_125KBPS) { |
| /* S=8 => 8 * 8 = 64 usecs per byte */ |
| octets = usecs >> 6; |
| } else if (phy_mode == BLE_PHY_MODE_CODED_500KBPS) { |
| /* S=2 => 2 * 8 = 16 usecs per byte */ |
| octets = usecs >> 4; |
| } else { |
| BLE_LL_ASSERT(0); |
| } |
| |
| /* see comment at the beginning */ |
| return max(27, octets); |
| } |
| |
| /** |
| * Initialize the Link Layer. Should be called only once |
| * |
| * @return int |
| */ |
| void |
| ble_ll_init(void) |
| { |
| int rc; |
| uint32_t features; |
| #ifdef BLE_XCVR_RFCLK |
| uint32_t xtal_ticks; |
| #endif |
| ble_addr_t addr; |
| struct ble_ll_obj *lldata; |
| |
| /* Ensure this function only gets called by sysinit. */ |
| SYSINIT_ASSERT_ACTIVE(); |
| |
| ble_ll_trace_init(); |
| ble_phy_trace_init(); |
| |
| /* Retrieve the public device address if not set by syscfg */ |
| memcpy(&addr.val[0], MYNEWT_VAL_BLE_PUBLIC_DEV_ADDR, BLE_DEV_ADDR_LEN); |
| if (!memcmp(&addr.val[0], ((ble_addr_t *)BLE_ADDR_ANY)->val, |
| BLE_DEV_ADDR_LEN)) { |
| rc = ble_hw_get_public_addr(&addr); |
| if (!rc) { |
| memcpy(g_dev_addr, &addr.val[0], BLE_DEV_ADDR_LEN); |
| } |
| } else { |
| memcpy(g_dev_addr, &addr.val[0], BLE_DEV_ADDR_LEN); |
| } |
| |
| #ifdef BLE_XCVR_RFCLK |
| /* Settling time of crystal, in ticks */ |
| xtal_ticks = MYNEWT_VAL(BLE_XTAL_SETTLE_TIME); |
| BLE_LL_ASSERT(xtal_ticks != 0); |
| g_ble_ll_data.ll_xtal_ticks = os_cputime_usecs_to_ticks(xtal_ticks); |
| |
| /* Initialize rf clock timer */ |
| os_cputime_timer_init(&g_ble_ll_data.ll_rfclk_timer, |
| ble_ll_xcvr_rfclk_timer_exp, NULL); |
| |
| #endif |
| |
| /* Get pointer to global data object */ |
| lldata = &g_ble_ll_data; |
| |
| /* Set acl pkt size and number */ |
| lldata->ll_num_acl_pkts = MYNEWT_VAL(BLE_ACL_BUF_COUNT); |
| lldata->ll_acl_pkt_size = MYNEWT_VAL(BLE_ACL_BUF_SIZE); |
| |
| /* |
| * XXX RIOT ties event queue to a thread which initialized it so we need to |
| * create event queue in LL task, not in general init function. This can |
| * lead to some races between host and LL so for now let us have it as a |
| * hack for RIOT where races can be avoided by proper initialization inside |
| * package. |
| */ |
| #ifndef RIOT_VERSION |
| /* Initialize eventq */ |
| ble_npl_eventq_init(&lldata->ll_evq); |
| #endif |
| |
| /* Initialize the transmit (from host) and receive (from phy) queues */ |
| STAILQ_INIT(&lldata->ll_tx_pkt_q); |
| STAILQ_INIT(&lldata->ll_rx_pkt_q); |
| |
| /* Initialize transmit (from host) and receive packet (from phy) event */ |
| ble_npl_event_init(&lldata->ll_rx_pkt_ev, ble_ll_event_rx_pkt, NULL); |
| ble_npl_event_init(&lldata->ll_tx_pkt_ev, ble_ll_event_tx_pkt, NULL); |
| |
| /* Initialize data buffer overflow event and completed packets */ |
| ble_npl_event_init(&lldata->ll_dbuf_overflow_ev, ble_ll_event_dbuf_overflow, NULL); |
| ble_npl_event_init(&lldata->ll_comp_pkt_ev, ble_ll_event_comp_pkts, NULL); |
| |
| /* Initialize the HW error timer */ |
| ble_npl_callout_init(&g_ble_ll_data.ll_hw_err_timer, |
| &g_ble_ll_data.ll_evq, |
| ble_ll_hw_err_timer_cb, |
| NULL); |
| |
| /* Initialize LL HCI */ |
| ble_ll_hci_init(); |
| |
| /* Init the scheduler */ |
| ble_ll_sched_init(); |
| |
| /* Initialize advertiser */ |
| ble_ll_adv_init(); |
| |
| /* Initialize a scanner */ |
| ble_ll_scan_init(); |
| |
| /* Initialize the connection module */ |
| ble_ll_conn_module_init(); |
| |
| /* Set the supported features. NOTE: we always support extended reject. */ |
| features = BLE_LL_FEAT_EXTENDED_REJ; |
| |
| #if (MYNEWT_VAL(BLE_LL_CFG_FEAT_DATA_LEN_EXT) == 1) |
| features |= BLE_LL_FEAT_DATA_LEN_EXT; |
| #endif |
| #if (MYNEWT_VAL(BLE_LL_CFG_FEAT_CONN_PARAM_REQ) == 1) |
| features |= BLE_LL_FEAT_CONN_PARM_REQ; |
| #endif |
| #if (MYNEWT_VAL(BLE_LL_CFG_FEAT_SLAVE_INIT_FEAT_XCHG) == 1) |
| features |= BLE_LL_FEAT_SLAVE_INIT; |
| #endif |
| #if (MYNEWT_VAL(BLE_LL_CFG_FEAT_LE_ENCRYPTION) == 1) |
| features |= BLE_LL_FEAT_LE_ENCRYPTION; |
| #endif |
| |
| #if (MYNEWT_VAL(BLE_LL_CFG_FEAT_LL_PRIVACY) == 1) |
| features |= (BLE_LL_FEAT_LL_PRIVACY | BLE_LL_FEAT_EXT_SCAN_FILT); |
| ble_ll_resolv_init(); |
| #endif |
| |
| #if (MYNEWT_VAL(BLE_LL_CFG_FEAT_LE_PING) == 1) |
| features |= BLE_LL_FEAT_LE_PING; |
| #endif |
| |
| #if (MYNEWT_VAL(BLE_LL_CFG_FEAT_LL_EXT_ADV) == 1) |
| features |= BLE_LL_FEAT_EXT_ADV; |
| #endif |
| |
| #if (MYNEWT_VAL(BLE_LL_CFG_FEAT_LE_CSA2) == 1) |
| /* CSA2 */ |
| features |= BLE_LL_FEAT_CSA2; |
| #endif |
| |
| #if (MYNEWT_VAL(BLE_LL_CFG_FEAT_LE_2M_PHY) == 1) |
| features |= BLE_LL_FEAT_LE_2M_PHY; |
| #endif |
| |
| #if (MYNEWT_VAL(BLE_LL_CFG_FEAT_LE_CODED_PHY) == 1) |
| features |= BLE_LL_FEAT_LE_CODED_PHY; |
| #endif |
| |
| /* Initialize random number generation */ |
| ble_ll_rand_init(); |
| |
| /* XXX: This really doesn't belong here, as the address probably has not |
| * been set yet. |
| */ |
| ble_ll_seed_prng(); |
| |
| lldata->ll_supp_features = features; |
| |
| #if MYNEWT |
| /* Initialize the LL task */ |
| os_task_init(&g_ble_ll_task, "ble_ll", ble_ll_task, NULL, |
| MYNEWT_VAL(BLE_LL_PRIO), OS_WAIT_FOREVER, g_ble_ll_stack, |
| BLE_LL_STACK_SIZE); |
| #else |
| |
| /* |
| * For non-Mynewt OS it is required that OS creates task for LL and run LL |
| * routine which is wrapped by nimble_port_ll_task_func(). |
| */ |
| |
| #endif |
| |
| rc = stats_init_and_reg(STATS_HDR(ble_ll_stats), |
| STATS_SIZE_INIT_PARMS(ble_ll_stats, STATS_SIZE_32), |
| STATS_NAME_INIT_PARMS(ble_ll_stats), |
| "ble_ll"); |
| SYSINIT_PANIC_ASSERT(rc == 0); |
| |
| ble_hci_trans_cfg_ll(ble_ll_hci_cmd_rx, NULL, ble_ll_hci_acl_rx, NULL); |
| |
| #if MYNEWT_VAL(BLE_LL_DIRECT_TEST_MODE) |
| ble_ll_dtm_init(); |
| #endif |
| } |
