Moving Wifi HAL to hardware

This change moves all Wifi HAL headers to libhardware_legacy; and moves
hal implementation under hardware/<vendor>/wlan. This way different
vendors will be able to tailor implementation to their drivers.

Change-Id: I55789bb6788ab694f4896aa36d76f7887b32dad6

1 files changed, 108 insertions, 0 deletions

diff --git a/include/hardware_legacy/wifi_hal.h b/include/hardware_legacy/wifi_hal.h
new file mode 100644
index 0000000..ed3b26b
--- /dev/null
+++ b/include/hardware_legacy/wifi_hal.h
@@ -0,0 +1,108 @@
+
+#ifndef __WIFI_HAL_H__
+#define __WIFI_HAL_H__
+
+typedef enum {
+    WIFI_SUCCESS = 0,
+    WIFI_ERROR_NONE = 0,
+    WIFI_ERROR_UNKNOWN = -1,
+    WIFI_ERROR_UNINITIALIZED = -2,
+    WIFI_ERROR_NOT_SUPPORTED = -3,
+    WIFI_ERROR_NOT_AVAILABLE = -4,              // Not available right now, but try later
+    WIFI_ERROR_INVALID_ARGS = -5,
+    WIFI_ERROR_INVALID_REQUEST_ID = -6,
+    WIFI_ERROR_TIMED_OUT = -7,
+    WIFI_ERROR_TOO_MANY_REQUESTS = -8,          // Too many instances of this request
+    WIFI_ERROR_OUT_OF_MEMORY = -9
+} wifi_error;
+
+typedef unsigned char byte;
+typedef unsigned char u8;
+typedef uint16_t u16;
+typedef uint32_t u32;
+typedef uint64_t u64;
+typedef int wifi_request_id;
+typedef int wifi_channel;                       // indicates channel frequency in MHz
+typedef int wifi_rssi;
+typedef byte mac_addr[6];
+typedef int64_t wifi_timestamp;                 // In microseconds (us)
+typedef int64_t wifi_timespan;                  // In nanoseconds  (ns)
+
+struct wifi_info;
+typedef wifi_info *wifi_handle;
+struct wifi_interface_info;
+typedef wifi_interface_info *wifi_interface_handle;
+
+/* Initialize/Cleanup */
+
+wifi_error wifi_initialize(wifi_handle *handle);
+typedef void (*wifi_cleaned_up_handler) (wifi_handle handle);
+void wifi_cleanup(wifi_handle handle, wifi_cleaned_up_handler handler);
+void wifi_event_loop(wifi_handle handle);
+
+/* Error handling */
+void wifi_get_error_info(wifi_error err, const char **msg); // return a pointer to a static string
+
+/* Feature enums */
+#define WIFI_FEATURE_INFRA          0x0001      // Basic infrastructure mode
+#define WIFI_FEATURE_INFRA_5G       0x0002      // Support for 5 GHz Band
+#define WIFI_FEATURE_HOTSPOT        0x0004      // Support for GAS/ANQP
+#define WIFI_FEATURE_P2P            0x0008      // Wifi-Direct
+#define WIFI_FEATURE_SOFT_AP        0x0010      // Soft AP
+#define WIFI_FEATURE_GSCAN          0x0020      // Google-Scan APIs
+#define WIFI_FEATURE_NBD            0x0040      // NearBy discovery
+#define WIFI_FEATURE_D2D_RTT        0x0080      // Device-to-device RTT
+#define WIFI_FEATURE_D2AP_RTT       0x0100      // Device-to-AP RTT
+#define WIFI_FEATURE_BATCH_GSCAN    0x0200      // Batched G-Scan
+#define WIFI_FEATURE_PNO            0x0400      // Preferred network offload
+#define WIFI_FEATURE_ADDITIONAL_STA 0x0800      // Support for two STAs
+#define WIFI_FEATURE_TDLS           0x1000      // Tunnel directed link setup
+
+// Add more features here
+
+typedef int feature_set;
+
+#define IS_MASK_SET(mask, flags)        ((flags & mask) == mask)
+#define IS_MASK_RESET(mask, flags)      ((flags & mask) == 0)
+
+#define IS_SUPPORTED_FEATURE(feature, featureSet)       IS_MASK_SET(feature, fetureSet)
+#define IS_UNSUPPORTED_FEATURE(feature, featureSet)     IS_MASK_RESET(feature, fetureSet)
+
+/* Feature set */
+wifi_error wifi_get_supported_feature_set(wifi_handle handle, feature_set *set);
+
+/*
+ * Each row represents a valid feature combination;
+ * all other combinations are invalid!
+ */
+wifi_error wifi_get_concurrency_matrix(wifi_handle handle, int *size, feature_set **matrix);
+
+/* List of all supported channels, including 5GHz channels */
+wifi_error wifi_get_supported_channels(wifi_handle handle, int *size, wifi_channel *list);
+
+/* Enhanced power reporting */
+wifi_error wifi_is_epr_supported(wifi_handle handle);
+
+/* multiple interface support */
+
+wifi_error wifi_get_ifaces(wifi_handle handle, int *num_ifaces, wifi_interface_handle **ifaces);
+wifi_error wifi_get_iface_name(wifi_interface_handle iface, char *name, size_t size);
+
+/* Configuration events */
+
+typedef struct {
+    void (*on_country_code_changed)(char code[2]);      // We can get this from supplicant too
+
+    // More event handlers
+} wifi_event_handler;
+
+wifi_error wifi_set_iface_event_handler(wifi_request_id id, wifi_interface_handle iface, wifi_event_handler eh);
+wifi_error wifi_reset_iface_event_handler(wifi_request_id id, wifi_interface_handle iface);
+
+/* include various feature headers */
+
+#include "gscan.h"
+#include "rtt.h"
+
+#endif
+