WLAN Development Example
This section describes how to initialize the WLAN module on a Hi3881 WLAN chip.
- Set parameters for the WLAN module based on hardware attributes.
/* Set parameters in the wlan_platform.hcs file based on hardware attributes. The following is an example of the WLAN platform configuration. */
hisi :& deviceList {
device0 :: deviceInst {
deviceInstId = 0;
powers {
power0 {
powerSeqDelay = 0; /* Power supply sequencing delay */
powerType = 1; /* Power supply type. Value 0 indicates that the power supply is always on, and value 1 indicates power supply through general-purpose input/output (GPIO). */
gpioId = 1; /* GPIO pin ID */
activeLevel=1; /* Active level. Value 0 indicates a low level, and value 1 indicates a high level. */
}
power1 {
powerSeqDelay = 0; /* Power supply sequencing delay */
powerType = 0; /* Power supply type. Value 0 indicates that the power supply is always on, and value 1 indicates power supply through GPIO. */
}
}
reset {
resetType = 0; /* Reset type. Value 0 indicates that reset is not supported, and value 1 indicates reset through GPIO. */
gpioId = 2; /* GPIO pin ID */
activeLevel=1; /* Active level. Value 0 indicates a low level, and value 1 indicates a high level. */
resetHoldTime = 30; /* Hold time (ms) for a reset */
}
bootUpTimeout = 30; /* Boot timeout duration (ms) */
bus {
busType = 0; /* Bus type. Value 0 indicates secure digital input/output (SDIO). */
busId = 2; /* Bus ID */
funcNum = [1]; /* SDIO function number */
timeout = 1000; /* Timeout duration for data read/write */
blockSize = 512; /* Size of the data block to read or write */
}
}
}
/* Add configuration file wlan_chip_<Chip name>.hcs (for example, wlan_chip_hi3881.hcs) for each chip and set parameters. The following takes the Hi3881 chip as an example. */
root {
wlan_config {
hi3881 :& chipList {
chipHi3881 :: chipInst {
match_attr = "hdf_wlan_chips_hi3881"; /* Match attribute */
chipName = "hi3881"; /* WLAN chip name */
sdio {
vendorId = 0x0296; /* Vendor ID */
deviceId = [0x5347]; /* Device ID */
}
}
}
}
}
- Mount the init and deinit functions of the WLAN chip and WLAN chip driver.
/* WLAN module initialization and mount process */
#include "hdf_device_desc.h"
#include "hdf_wifi_product.h"
#include "hdf_log.h"
#include "osal_mem.h"
#include "hdf_wlan_chipdriver_manager.h"
#include "securec.h"
#include "wifi_module.h"
#include "hi_wifi_api.h"
#include "hi_types_base.h"
#define HDF_LOG_TAG Hi3881Driver
/* Functions for initializing and deinitializing the WLAN chip */
int32_t InitHi3881Chip(struct HdfWlanDevice *device);
int32_t DeinitHi3881Chip(struct HdfWlanDevice *device);
/* Functions for initializing and deinitializing the WLAN chip driver */
int32_t Hi3881Deinit(struct HdfChipDriver* chipDriver, struct NetDevice *netDevice);
int32_t Hi3881Init(struct HdfChipDriver* chipDriver, struct NetDevice *netDevice);
/* Initialize mac80211 and mount functions of the chip. */
hi_void HiMac80211Init(struct HdfChipDriver *chipDriver);
static const char* const HI3881_DRIVER_NAME = "hisi";
/* Mount the WLAN chip driver and the functions of mac80211 and the chip. */
static struct HdfChipDriver *BuildHi3881Driver(struct HdfWlanDevice *device, uint8_t ifIndex)
{
struct HdfChipDriver *specificDriver = NULL;
if (device == NULL) {
HDF_LOGE("%s fail : channel is NULL", __func__);
return NULL;
}
(void)device;
(void)ifIndex;
specificDriver = (struct HdfChipDriver *)OsalMemCalloc(sizeof(struct HdfChipDriver));
if (specificDriver == NULL) {
HDF_LOGE("%s fail: OsalMemCalloc fail!", __func__);
return NULL;
}
if (memset_s(specificDriver, sizeof(struct HdfChipDriver), 0, sizeof(struct HdfChipDriver)) != EOK) {
HDF_LOGE("%s fail: memset_s fail!", __func__);
OsalMemFree(specificDriver);
return NULL;
}
if (strcpy_s(specificDriver->name, MAX_WIFI_COMPONENT_NAME_LEN, HI3881_DRIVER_NAME) != EOK) {
HDF_LOGE("%s fail : strcpy_s fail", __func__);
OsalMemFree(specificDriver);
return NULL;
}
specificDriver->init = Hi3881Init;
specificDriver->deinit = Hi3881Deinit;
HiMac80211Init(specificDriver);
return specificDriver;
}
/* Release the WLAN chip driver. */
static void ReleaseHi3881Driver(struct HdfChipDriver *chipDriver)
{
if (chipDriver == NULL) {
return;
}
if (strcmp(chipDriver->name, HI3881_DRIVER_NAME) != 0) {
HDF_LOGE("%s:Not my driver!", __func__);
return;
}
OsalMemFree(chipDriver);
}
static uint8_t GetHi3881GetMaxIFCount(struct HdfChipDriverFactory *factory) {
(void)factory;
return 1;
}
/* Register functions related to the WLAN chip. */
static int32_t HDFWlanRegHisiDriverFactory(void)
{
static struct HdfChipDriverFactory tmpFactory = { 0 };
struct HdfChipDriverManager *driverMgr = NULL;
driverMgr = HdfWlanGetChipDriverMgr();
if (driverMgr == NULL && driverMgr->RegChipDriver != NULL) {
HDF_LOGE("%s fail: driverMgr is NULL!", __func__);
return HDF_FAILURE;
}
tmpFactory.driverName = HI3881_DRIVER_NAME;
tmpFactory.GetMaxIFCount = GetHi3881GetMaxIFCount;
tmpFactory.InitChip = InitHi3881Chip;
tmpFactory.DeinitChip = DeinitHi3881Chip;
tmpFactory.Build = BuildHi3881Driver;
tmpFactory.Release = ReleaseHi3881Driver;
tmpFactory.ReleaseFactory = NULL;
if (driverMgr->RegChipDriver(&tmpFactory) != HDF_SUCCESS) {
HDF_LOGE("%s fail: driverMgr is NULL!", __func__);
return HDF_FAILURE;
}
return HDF_SUCCESS;
}
static int32_t HdfWlanHisiChipDriverInit(struct HdfDeviceObject *device)
{
(void)device;
return HDFWlanRegHisiDriverFactory();
}
struct HdfDriverEntry g_hdfHisiChipEntry = {
.moduleVersion = 1,
.Init = HdfWlanHisiChipDriverInit,
.moduleName = "HDF_WLAN_CHIPS"
};
HDF_INIT(g_hdfHisiChipEntry);
#include "hdf_wifi_product.h"
#include "hi_wifi_api.h"
#if (_PRE_OS_VERSION_LINUX == _PRE_OS_VERSION)
#include "oal_thread.h"
#include "osal_time.h"
#endif
#include "wifi_mac80211_ops.h"
#include "wal_cfg80211.h"
#include "net_adpater.h"
#include "hdf_wlan_utils.h"
#define HDF_LOG_TAG Hi3881Driver
/* Initialize the WLAN chip. */
int32_t InitHi3881Chip(struct HdfWlanDevice *device)
{
uint8_t maxPortCount = 1;
int32_t ret = HI_SUCCESS;
uint8_t maxRetryCount = 2;
if (device == NULL) {
HDF_LOGE("%s:NULL ptr!", __func__);
return HI_FAIL;
}
do {
if (ret != HI_SUCCESS) {
if (device->reset != NULL && device->reset->Reset != NULL) {
device->reset->Reset(device->reset);
}
HDF_LOGE("%s:Retry init hi3881!last ret=%d", __func__, ret);
}
ret = hi_wifi_init(maxPortCount);
} while (ret != 0 && --maxRetryCount > 0);
if (ret != 0) {
HDF_LOGE("%s:Init hi3881 driver failed!", __func__);
return ret;
}
return HI_SUCCESS;
}
/* Deinitialize the WLAN chip. */
int32_t DeinitHi3881Chip(struct HdfWlanDevice *device)
{
(void)device;
int32_t ret = hi_wifi_deinit();
if (ret != 0) {
HDF_LOGE("%s:Deinit failed!ret=%d", __func__, ret);
}
return ret;
}
/* Initialize the WLAN chip driver. */
int32_t Hi3881Init(struct HdfChipDriver *chipDriver, struct NetDevice *netDevice)
{
HDF_LOGI("%s: start...", __func__);
hi_u16 mode = wal_get_vap_mode();
int32_t ret;
nl80211_iftype_uint8 type;
(void)chipDriver;
if (mode >= WAL_WIFI_MODE_BUTT) {
oam_error_log1(0, 0, "wal_init_drv_netdev:: invalid mode[%d]", mode);
return HI_FAIL;
}
if (mode == WAL_WIFI_MODE_STA) {
type = NL80211_IFTYPE_STATION;
} else if (mode == WAL_WIFI_MODE_AP) {
type = NL80211_IFTYPE_AP;
} else {
oam_error_log1(0, 0, "wal_init_drv_netdev:: invalid mode[%d]", mode);
return HI_FAIL;
}
ret = wal_init_drv_wlan_netdev(type, WAL_PHY_MODE_11N, netDevice);
if (ret != HI_SUCCESS) {
oam_error_log2(0, OAM_SF_ANY, "wal_init_drv_netdev %s failed.l_return:%d\n", netDevice->name, ret);
}
return ret;
}
/* Deinitialize the WLAN chip driver. */
int32_t Hi3881Deinit(struct HdfChipDriver *chipDriver, struct NetDevice *netDevice)
{
(void)chipDriver;
int32_t ret = wal_deinit_drv_wlan_netdev(netDevice);
if (ret != HDF_SUCCESS) {
return ret;
}
return ReleasePlatformNetDevice(netDevice);
}
- During the chip initialization, call the NetDeviceInit() function to initialize a network device, call the NetDeviceAdd() function to add the network device to a protocol stack, and implement some function pointers of netdev.
hi_s32 wal_init_drv_wlan_netdev(nl80211_iftype_uint8 type, wal_phy_mode mode, hi_char* ifname, hi_u32* len)
{
oal_net_device_stru *netdev = HI_NULL;
......
/* Initialize the network device and obtain the initialized instance. */
netdev = NetDeviceInit(ifname, *len, LITE_OS);
oal_wireless_dev *wdev = (oal_wireless_dev *)oal_mem_alloc(OAL_MEM_POOL_ID_LOCAL, sizeof(oal_wireless_dev));
ret = wal_init_netif(type, netdev, wdev);
......
return HI_SUCCESS;
}
/* Mount some function pointers of {@link NetDeviceInterFace}. */
oal_net_device_ops_stru g_wal_net_dev_ops =
{
.getStats = wal_netdev_get_stats,
.open = wal_netdev_open,
.stop = wal_netdev_stop,
.xmit = hmac_bridge_vap_xmit,
.ioctl = wal_net_device_ioctl,
.changeMtu = oal_net_device_change_mtu,
.init = oal_net_device_init,
.deInit = oal_net_free_netdev,
#if (defined(_PRE_WLAN_FEATURE_FLOWCTL) || defined(_PRE_WLAN_FEATURE_OFFLOAD_FLOWCTL))
.selectQueue = wal_netdev_select_queue,
#endif
.setMacAddr = wal_netdev_set_mac_addr,
#if (_PRE_OS_VERSION_LITEOS == _PRE_OS_VERSION)
.netifNotify = HI_NULL,
#endif
.specialEtherTypeProcess = SpecialEtherTypeProcess,
};
hi_s32 wal_init_netif(nl80211_iftype_uint8 type, oal_net_device_stru *netdev, const oal_wireless_dev *wdev)
{
/* Add the network device to a protocol stack. */
hi_u32 ret = NetDeviceAdd(netdev, (Protocol80211IfType)type);
......
return HI_SUCCESS;
}
- Implement functions of WifiMac80211Ops.
/* Mount some function pointers of mac80211. */
/* MAC-layer APIs for basic capabilities that need to be implemented by the driver */
static struct HdfMac80211BaseOps g_baseOps = {
.SetMode = WalSetMode,
.AddKey = WalAddKey,
.DelKey = WalDelKey,
.SetDefaultKey = WalSetDefaultKey,
.GetDeviceMacAddr = WalGetDeviceMacAddr,
.SetMacAddr = WalSetMacAddr,
.SetTxPower = WalSetTxPower,
.GetValidFreqsWithBand = WalGetValidFreqsWithBand,
.GetHwCapability = WalGetHwCapability
};
/* MAC-layer APIs for station capabilities that need to be implemented by the driver */
static struct HdfMac80211STAOps g_staOps = {
.Connect = WalConnect,
.Disconnect = WalDisconnect,
.StartScan = WalStartScan,
.AbortScan = WalAbortScan,
.SetScanningMacAddress = WalSetScanningMacAddress,
};
/* MAC-layer APIs for AP capabilities that need to be implemented by the driver */
static struct HdfMac80211APOps g_apOps = {
.ConfigAp = WalConfigAp,
.StartAp = WalStartAp,
.StopAp = WalStopAp,
.ConfigBeacon = WalChangeBeacon,
.DelStation = WalDelStation,
.SetCountryCode = WalSetCountryCode,
.GetAssociatedStasCount = WalGetAssociatedStasCount,
.GetAssociatedStasInfo = WalGetAssociatedStasInfo
};
/* Initialize mac80211 and mount functions of the chip. */
hi_void HiMac80211Init(struct HdfChipDriver *chipDriver)
{
if (chipDriver == NULL) {
oam_error_log(0, OAM_SF_ANY, "%s:input is NULL!", __func__);
return;
}
chipDriver->ops = &g_baseOps;
chipDriver->staOps = &g_staOps;
chipDriver->apOps = &g_apOps;
}