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authorPrerepa Viswanadham <dham@google.com>2015-04-10 15:20:02 -0700
committerPrerepa Viswanadham <dham@google.com>2015-04-10 15:20:02 -0700
commit8e8bf307a5bfb8231c6a09266f383a5b92f4af39 (patch)
tree98ebdb9b386b7c879054f3a13a157eb47aa8b934
parent4447f7acd7bf6827e8c28f43d54b3dd068f4d42a (diff)
parentb4442c37ffd4aa4232a317131bff8f13669801ed (diff)
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Merge commit 'b4442c3' into merge_work
-rw-r--r--include/hardware_legacy/rtt.h207
1 files changed, 135 insertions, 72 deletions
diff --git a/include/hardware_legacy/rtt.h b/include/hardware_legacy/rtt.h
index 45937fc..f0c5b29 100644
--- a/include/hardware_legacy/rtt.h
+++ b/include/hardware_legacy/rtt.h
@@ -5,81 +5,142 @@
#ifndef __WIFI_HAL_RTT_H__
#define __WIFI_HAL_RTT_H__
-/* channel operating width */
-
/* Ranging status */
typedef enum {
- RTT_STATUS_SUCCESS,
- RTT_STATUS_FAILURE,
- RTT_STATUS_FAIL_NO_RSP,
- RTT_STATUS_FAIL_INVALID_TS, // Invalid T1-T4 timestamp
- RTT_STATUS_FAIL_PROTOCOL, // 11mc protocol failed
- RTT_STATUS_FAIL_REJECTED,
- RTT_STATUS_FAIL_NOT_SCHEDULED_YET,
- RTT_STATUS_FAIL_SCHEDULE, // schedule failed
- RTT_STATUS_FAIL_TM_TIMEOUT,
- RTT_STATUS_FAIL_AP_ON_DIFF_CHANNEL,
- RTT_STATUS_FAIL_NO_CAPABILITY,
- RTT_STATUS_FAIL_BUSY_TRY_LATER,
- RTT_STATUS_ABORTED
+ RTT_STATUS_SUCCESS = 0,
+ RTT_STATUS_FAILURE = 1, // general failure status
+ RTT_STATUS_FAIL_NO_RSP = 2, // target STA does not respond to request
+ RTT_STATUS_FAIL_REJECTED = 3, // request rejected. Applies to 2-sided RTT only
+ RTT_STATUS_FAIL_NOT_SCHEDULED_YET = 4,
+ RTT_STATUS_FAIL_TM_TIMEOUT = 5, // timing measurement times out
+ RTT_STATUS_FAIL_AP_ON_DIFF_CHANNEL = 6, // Target on different channel, cannot range
+ RTT_STATUS_FAIL_NO_CAPABILITY = 7, // ranging not supported
+ RTT_STATUS_ABORTED = 8, // request aborted for unknown reason
+ RTT_STATUS_FAIL_INVALID_TS = 9, // Invalid T1-T4 timestamp
+ RTT_STATUS_FAIL_PROTOCOL = 10, // 11mc protocol failed
+ RTT_STATUS_FAIL_SCHEDULE = 11, // request could not be scheduled
+ RTT_STATUS_FAIL_BUSY_TRY_LATER = 12, // responder cannot collaborate at time of request
+ RTT_STATUS_INVALID_REQ = 13, // bad request args
+ RTT_STATUS_NO_WIFI = 14, // WiFi not enabled
+ RTT_STATUS_FAIL_FTM_PARAM_OVERRIDE = 15 // Responder overrides param info, cannot range with new params
} wifi_rtt_status;
+/* RTT peer type */
+typedef enum {
+ RTT_PEER_AP = 0x1,
+ RTT_PEER_STA = 0x2,
+ RTT_PEER_P2P_GO = 0x3,
+ RTT_PEER_P2P_CLIENT = 0x4,
+ RTT_PEER_NAN = 0x5
+} rtt_peer_type;
+
+/* RTT Measurement Bandwidth */
+typedef enum {
+ WIFI_RTT_BW_5 = 0x01,
+ WIFI_RTT_BW_10 = 0x02,
+ WIFI_RTT_BW_20 = 0x04,
+ WIFI_RTT_BW_40 = 0x08,
+ WIFI_RTT_BW_80 = 0x10,
+ WIFI_RTT_BW_160 = 0x20
+} wifi_rtt_bw;
+
+/* RTT Measurement Preamble */
+typedef enum {
+ WIFI_RTT_PREAMBLE_LEGACY = 0x1,
+ WIFI_RTT_PREAMBLE_HT = 0x2,
+ WIFI_RTT_PREAMBLE_VHT = 0x4
+} wifi_rtt_preamble;
/* RTT Type */
typedef enum {
- RTT_TYPE_INVALID,
- RTT_TYPE_1_SIDED,
- RTT_TYPE_2_SIDED,
- RTT_TYPE_AUTO, // Two sided if remote supports; one sided otherwise
+ RTT_TYPE_1_SIDED = 0x1,
+ RTT_TYPE_2_SIDED = 0x2,
} wifi_rtt_type;
/* RTT configuration */
typedef struct {
- mac_addr addr; // peer device mac address
- wifi_rtt_type type; // optional - rtt type hint.
- // RTT_TYPE_AUTO implies best effort
- wifi_peer_type peer; // optional - peer device hint (STA, P2P, AP)
- wifi_channel_info channel; // Required for STA-AP mode, optional for P2P, NBD etc.
- unsigned interval; // interval between RTT burst (unit ms).
- // Only valid when multi_burst = 1
- unsigned num_burst; // total number of RTT bursts, 1 means single shot
- unsigned num_frames_per_burst; // num of frames in each RTT burst
- // for single side, measurement result num = frame number
- // for 2 side RTT, measurement result num = frame number - 1
- unsigned num_retries_per_measurement_frame; // retry time for RTT MEASUREMENT frame
-
- //following fields are only valid for 2 side RTT
- unsigned num_retries_per_ftmr;
- byte LCI_request; // request LCI or not
- byte LCR_request; // request LCR or not
- unsigned burst_timeout; // unit of 250 us
- byte preamble; // 0- Legacy,1- HT, 2-VHT
- byte bw; //5, 10, 20, 40, 80,160
+ mac_addr addr; // peer device mac address
+ wifi_rtt_type type; // 1-sided or 2-sided RTT
+ rtt_peer_type peer; // optional - peer device hint (STA, P2P, AP)
+ wifi_channel_info channel; // Required for STA-AP mode, optional for P2P, NBD etc.
+ unsigned burst_period; // Time interval between bursts (units: 100 ms).
+ // Applies to 1-sided and 2-sided RTT multi-burst requests.
+ // Range: 0-31, 0: no preference by initiator (2-sided RTT)
+ unsigned num_burst; // Total number of RTT bursts to be executed. It will be
+ // specified in the same way as the parameter "Number of
+ // Burst Exponent" found in the FTM frame format. It
+ // applies to both: 1-sided RTT and 2-sided RTT. Valid
+ // values are 0 to 15 as defined in 802.11mc std.
+ // 0 means single shot
+ // The implication of this parameter on the maximum
+ // number of RTT results is the following:
+ // for 1-sided RTT: max num of RTT results = (2^num_burst)*(num_frames_per_burst)
+ // for 2-sided RTT: max num of RTT results = (2^num_burst)*(num_frames_per_burst - 1)
+ unsigned num_frames_per_burst; // num of frames per burst.
+ // Minimum value = 1, Maximum value = 31
+ // For 2-sided this equals the number of FTM frames
+ // to be attempted in a single burst. This also
+ // equals the number of FTM frames that the
+ // initiator will request that the responder send
+ // in a single frame.
+ unsigned num_retries_per_rtt_frame; // number of retries for a failed RTT frame. Applies
+ // to 1-sided RTT only. Minimum value = 0, Maximum value = 3
+
+ //following fields are only valid for 2-side RTT
+ unsigned num_retries_per_ftmr; // Maximum number of retries that the initiator can
+ // retry an FTMR frame.
+ // Minimum value = 0, Maximum value = 3
+ byte LCI_request; // 1: request LCI, 0: do not request LCI
+ byte LCR_request; // 1: request LCR, 0: do not request LCR
+ unsigned burst_duration; // Applies to 1-sided and 2-sided RTT. Valid values will
+ // be 2-11 and 15 as specified by the 802.11mc std for
+ // the FTM parameter burst duration. In a multi-burst
+ // request, if responder overrides with larger value,
+ // the initiator will return failure. In a single-burst
+ // request if responder overrides with larger value,
+ // the initiator will sent TMR_STOP to terminate RTT
+ // at the end of the burst_duration it requested.
+ wifi_rtt_preamble preamble; // RTT preamble to be used in the RTT frames
+ wifi_rtt_bw bw; // RTT BW to be used in the RTT frames
} wifi_rtt_config;
-/* RTT results*/
+/* RTT results */
typedef struct {
- mac_addr addr; // device mac address
- unsigned burst_num; // # of burst inside a multi-burst request
- unsigned measurement_number; // total RTT measurement Frames
- unsigned success_number; // total successful RTT measurement Frames
- byte number_per_burst_peer; //Max number of FTM numbers per burst the other side support,
- //11mc only
- wifi_rtt_status status; // ranging status
- byte retry_after_duration; // in s , 11mc only, only for RTT_STATUS_FAIL_BUSY_TRY_LATER, 1-31s
- wifi_rtt_type type; // RTT type
- wifi_rssi rssi; // average rssi in 0.5 dB steps e.g. 143 implies -71.5 dB
- wifi_rssi rssi_spread; // rssi spread in 0.5 dB steps e.g. 5 implies 2.5 dB spread (optional)
- wifi_rate tx_rate; // TX rate
- wifi_rate rx_rate; // Rx rate
- wifi_timespan rtt; // round trip time in 0.1 nanoseconds
- wifi_timespan rtt_sd; // rtt standard deviation in 0.1 nanoseconds
- wifi_timespan rtt_spread; // difference between max and min rtt times recorded
- int distance; // distance in cm (optional)
- int distance_sd; // standard deviation in cm (optional)
- int distance_spread; // difference between max and min distance recorded (optional)
- wifi_timestamp ts; // time of the measurement (in microseconds since boot)
- int burst_duration; // in ms, How long the FW time is to finish one burst measurement
+ mac_addr addr; // device mac address
+ unsigned burst_num; // burst number in a multi-burst request
+ unsigned measurement_number; // Total RTT measurement frames attempted
+ unsigned success_number; // Total successful RTT measurement frames
+ byte number_per_burst_peer; // Maximum number of "FTM frames per burst" supported by
+ // the responder STA. Applies to 2-sided RTT only.
+ // If reponder overrides with larger value:
+ // - for single-burst request initiator will truncate the
+ // larger value and send a TMR_STOP after receiving as
+ // many frames as originally requested.
+ // - for multi-burst request, initiator will return
+ // failure right away.
+ wifi_rtt_status status; // ranging status
+ byte retry_after_duration; // When status == RTT_STATUS_FAIL_BUSY_TRY_LATER,
+ // this will be the time provided by the responder as to
+ // when the request can be tried again. Applies to 2-sided
+ // RTT only. In sec, 1-31sec.
+ wifi_rtt_type type; // RTT type
+ wifi_rssi rssi; // average rssi in 0.5 dB steps e.g. 143 implies -71.5 dB
+ wifi_rssi rssi_spread; // rssi spread in 0.5 dB steps e.g. 5 implies 2.5 dB spread (optional)
+ wifi_rate tx_rate; // 1-sided RTT: TX rate of RTT frame.
+ // 2-sided RTT: TX rate of initiator's Ack in response to FTM frame.
+ wifi_rate rx_rate; // 1-sided RTT: TX rate of Ack from other side.
+ // 2-sided RTT: TX rate of FTM frame coming from responder.
+ wifi_timespan rtt; // round trip time in 0.1 nanoseconds
+ wifi_timespan rtt_sd; // rtt standard deviation in 0.1 nanoseconds
+ wifi_timespan rtt_spread; // difference between max and min rtt times recorded
+ int distance; // distance in cm (optional)
+ int distance_sd; // standard deviation in cm (optional)
+ int distance_spread; // difference between max and min distance recorded (optional)
+ wifi_timestamp ts; // time of the measurement (in microseconds since boot)
+ int burst_duration; // in ms, actual time taken by the FW to finish one burst
+ // measurement. Applies to 1-sided and 2-sided RTT.
+ int negotiated_burst_num; // Number of bursts allowed by the responder. Applies
+ // to 2-sided RTT only.
wifi_information_element *LCI; // for 11mc only
wifi_information_element *LCR; // for 11mc only
} wifi_rtt_result;
@@ -99,7 +160,7 @@ wifi_error wifi_rtt_range_cancel(wifi_request_id id, wifi_interface_handle ifac
/* NBD ranging channel map */
typedef struct {
- wifi_channel availablity[32]; // specifies the channel map for each of the 16 TU windows
+ wifi_channel availablity[32]; // specifies the channel map for each of the 16 TU windows
// frequency of 0 => unspecified; which means firmware is
// free to do whatever it wants in this window.
} wifi_channel_map;
@@ -117,25 +178,27 @@ wifi_error wifi_rtt_channel_map_set(wifi_request_id id,
DW interval and will also stop broadcasting NBD ranging attribute in SDF */
wifi_error wifi_rtt_channel_map_clear(wifi_request_id id, wifi_interface_handle iface);
+// Preamble definition for bit mask used in wifi_rtt_capabilities
#define PREAMBLE_LEGACY 0x1
#define PREAMBLE_HT 0x2
#define PREAMBLE_VHT 0x4
-#define BW_5_SUPPORT 0x1
-#define BW_10_SUPPORT 0x2
-#define BW_20_SUPPORT 0x4
-#define BW_40_SUPPORT 0x8
-#define BW_80_SUPPORT 0x10
-#define BW_160_SUPPORT 0x20
+// BW definition for bit mask used in wifi_rtt_capabilities
+#define BW_5_SUPPORT 0x1
+#define BW_10_SUPPORT 0x2
+#define BW_20_SUPPORT 0x4
+#define BW_40_SUPPORT 0x8
+#define BW_80_SUPPORT 0x10
+#define BW_160_SUPPORT 0x20
/* RTT Capabilities */
typedef struct {
byte rtt_one_sided_supported; // if 1-sided rtt data collection is supported
byte rtt_ftm_supported; // if ftm rtt data collection is supported
- byte lci_support;
- byte lcr_support;
- byte preamble_support; //bit mask indicate what preamble is supported
- byte bw_support; //bit mask indicate what BW is supported
+ byte lci_support; // if initiator supports LCI request. Applies to 2-sided RTT
+ byte lcr_support; // if initiator supports LCR request. Applies to 2-sided RTT
+ byte preamble_support; // bit mask indicates what preamble is supported by initiator
+ byte bw_support; // bit mask indicates what BW is supported by initiator
} wifi_rtt_capabilities;
/* RTT capabilities of the device */