MTK wifi驱动源码分析

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我是靠谱客的博主大意万宝路，最近开发中收集的这篇文章主要介绍MTK wifi驱动源码分析，觉得挺不错的，现在分享给大家，希望可以做个参考。

概述

1、驱动加载入口

module_init(wifi_drv_init_module);
module_exit(wifi_drv_cleanup_module);

完成对驱动的注册调用
static int __init wifi_drv_init_module(void)
{
int status = 0;

os_module_init();

#ifdef RTMP_PCI_SUPPORT
status = rt_pci_init_module();

   if (status)
       MTWF_LOG(DBG_CAT_INIT, DBG_SUBCAT_ALL, DBG_LVL_ERROR,
               ("Register PCI device driver failed(%d)!n", status));

#endif /* RTMP_PCI_SUPPORT */
return status;
}

static void __exit wifi_drv_cleanup_module(void)
{
#ifdef RTMP_PCI_SUPPORT
   rt_pci_cleanup_module();
   MTWF_LOG(DBG_CAT_INIT, DBG_SUBCAT_ALL, DBG_LVL_ERROR,
           ("Unregister PCI device drivern"));
#endif /* RTMP_PCI_SUPPORT */
   os_module_exit();
}
module_init(wifi_drv_init_module);
module_exit(wifi_drv_cleanup_module);

2、RTMP接口的初始化

在这个函数初始化各个接口，包括wifi配置、wifi网络设置等
VOID RtmpDrvOpsInit(
   OUT VOID *pDrvOpsOrg,
   INOUT VOID *pDrvNetOpsOrg,
   IN RTMP_PCI_CONFIG *pPciConfig,
   IN RTMP_USB_CONFIG *pUsbConfig)
{
   RTMP_DRV_ABL_OPS *pDrvOps = (RTMP_DRV_ABL_OPS *)pDrvOpsOrg;

   /* init PCI/USB configuration in different OS */
   if (pPciConfig != NULL)
       RtmpPciConfig = *pPciConfig;

if (pUsbConfig != NULL)
RtmpUsbConfig = *pUsbConfig;

   /* init operators provided from us (DRIVER module) */
   pDrvOps->RTMPAllocAdapterBlock = RTMPAllocAdapterBlock;
   pDrvOps->RTMPFreeAdapter = RTMPFreeAdapter;
   pDrvOps->RtmpRaDevCtrlExit = RtmpRaDevCtrlExit;
   pDrvOps->RtmpRaDevCtrlInit = RtmpRaDevCtrlInit;
#ifdef RTMP_MAC_PCI
   pDrvOps->RTMPHandleInterrupt = mtd_isr;
#endif /* RTMP_MAC_PCI */
   pDrvOps->RTMPSendPackets = RTMPSendPackets;
#ifdef P2P_SUPPORT
   pDrvOps->P2P_PacketSend = P2P_PacketSend;
#endif /* P2P_SUPPORT */
   pDrvOps->RTMP_COM_IoctlHandle = RTMP_COM_IoctlHandle;
#ifdef CONFIG_AP_SUPPORT
   pDrvOps->RTMP_AP_IoctlHandle = RTMP_AP_IoctlHandle;
#endif /* CONFIG_AP_SUPPORT */
#ifdef CONFIG_STA_SUPPORT
   pDrvOps->RTMP_STA_IoctlHandle = RTMP_STA_IoctlHandle;
#endif /* CONFIG_STA_SUPPORT */
   pDrvOps->RTMPDrvOpen = RTMPDrvOpen;
   pDrvOps->RTMPDrvClose = RTMPDrvClose;
   pDrvOps->mt_wifi_init = mt_wifi_init;
   /* init operators provided from us and netif module */
   *pDrvNetOps = *pRtmpDrvNetOps;
}

2.1软硬件前期初始化

static INT RtmpChipOpsRegister(RTMP_ADAPTER *pAd, INT infType)

{

ret = RtmpChipOpsHook(pAd);

WfSysPreInit(pAd);

}

2.2 mt_wifi_init 初始化
/*rename from rt28xx_init*/
int mt_wifi_init(VOID *pAdSrc, RTMP_STRING *pDefaultMac, RTMP_STRING *pHostName)
{

   /*for software system initialize*/
   if (rtmp_sys_init(pAd, pHostName) != TRUE) //wifi软件系统初始化
       goto err2

}

static INT rtmp_sys_init(RTMP_ADAPTER *pAd, RTMP_STRING *pHostName)

{

/* Initialize pAd->StaCfg[], pAd->ApCfg, pAd->CommonCfg to manufacture default*/
if (rtmp_cfg_init(pAd, pHostName) != TRUE) //配置初始化
goto err2;

}

INT rtmp_cfg_init(RTMP_ADAPTER *pAd, RTMP_STRING *pHostName)

{

* For Vxworks we have already configured through IOCTL instead of profile, no need to init user cfg again */
UserCfgInit(pAd);

}

3、网络设备的初始化

PNET_DEV RtmpPhyNetDevInit(VOID *pAd, RTMP_OS_NETDEV_OP_HOOK *pNetDevHook)

{

   pNetDevHook->open = main_virtual_if_open;
   pNetDevHook->stop = main_virtual_if_close;
   pNetDevHook->xmit = rt28xx_send_packets;
#ifdef IKANOS_VX_1X0
   pNetDevHook->xmit = IKANOS_DataFramesTx;

}

3.1 加载wifi ra0、rai0设备

int main_virtual_if_open(struct net_device *net_dev)

{

if (VIRTUAL_IF_INIT(pAd, net_dev) != 0) //判断raxx是否加载
return -1;

if (VIRTUAL_IF_UP(pAd, net_dev) != 0)
return -1;

}

加载ra0设备

int mt_wifi_open(VOID *dev)

{

   /* Chip & other init */
   if (mt_wifi_init(pAd, mac, hostname) == FALSE) //wifi 配置相关初始化
       goto err;

mt_service_init(pAd); //MT