高通平台在modem侧读取和设置GPIO状态

小灰灰 2022-10-28 00:58 472阅读 0赞

高通MSM8953平台有一个需求：需要在modem侧读取和设置GPIO状态，这样就可以识别不同的硬件版本，从而加载不同的射频NV文件。

使用GPIO134和GPIO62来检测不同硬件的上下拉来识别，如下图：  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2Nvcm5lcnN0b25lMQ_size_16_color_FFFFFF_t_70]  
**代码修改**  
modem代码侧GPIO相关的头文件在modem\_proc/core/api/systemdrivers/目录下。首先包括这些使用的头文件：

//begin: stone added for gpio-in
    /* DAL APIs */
    #include "DDITlmm.h"
    #include "DalDevice.h"
    #include "DALDeviceId.h"
    //end: stone added for gpio-in

再定义使用的GPIO：

//begin: stone added for gpio-in
    #define RF_GPIO_NUM1            134
    #define RF_GPIO_NUM2            62
    
    #define RF_CONFIG_GPIO1 \
            DAL_GPIO_CFG(RF_GPIO_NUM1, 0, (uint32)DAL_GPIO_INPUT, (uint32)DAL_GPIO_PULL_UP, (uint32)DAL_GPIO_2MA)
    
    #define RF_CONFIG_GPIO2 \
            DAL_GPIO_CFG(RF_GPIO_NUM2, 0, (uint32)DAL_GPIO_INPUT, (uint32)DAL_GPIO_PULL_UP, (uint32)DAL_GPIO_2MA)
    //end: stone added for gpio-in

如果需要使用GPIO输出，还可以添加：

//测试输出
    #define TEST_GPIO_NUM            0
    
    #define TEST_CONFIG_GPIO \
            DAL_GPIO_CFG(TEST_GPIO_NUM, 0, (uint32)DAL_GPIO_OUTPUT, (uint32)DAL_GPIO_PULL_UP, (uint32)DAL_GPIO_2MA)

函数定义：

//begin: stone added for gpio-in
    static DalDeviceHandle *tlmm_dal_handle = NULL;
    
    DALResult gpio_init_dal_handle(void)
    {
        
      DALResult dal_status = DAL_SUCCESS;
    
      /* Replacing bio with DAL equivalent*/
      dal_status = DAL_DeviceAttach(DALDEVICEID_TLMM, &tlmm_dal_handle);
      if(dal_status == DAL_SUCCESS)
      {
        
        (void) DalDevice_Open(tlmm_dal_handle,DAL_OPEN_SHARED);
      }
    
      return dal_status;
    }
    
    int rfc_common_get_gpio(void)
    {
        
      int ret_status = 0;
      int ret_status_134 = 0;
      int ret_status_62 = 0;
    
      DALResult nResult = DAL_ERROR;
      DALGpioValueType eValue;
      DalTlmm_GpioConfigIdType Settings;
    
      gpio_init_dal_handle();
      
      if (tlmm_dal_handle == NULL)
      {
        
        MSG_1(MSG_SSID_RF, MSG_LEGACY_ERROR,"rfc_common_tlmm_dal_handle==NULL", 0);
        return -1;
      }
    
      //DalTlmm_SelectGpioIdMode(tlmm_dal_handle, UIM_TLMM_GPIO_INST_INDEX, &Settings);
    
      //config gpio function
      (void)DalTlmm_ConfigGpio(tlmm_dal_handle,
                 (DALGpioSignalType)RF_CONFIG_GPIO1,
                  DAL_TLMM_GPIO_ENABLE);
    
      (void)DalTlmm_ConfigGpio(tlmm_dal_handle,
                 (DALGpioSignalType)RF_CONFIG_GPIO2,
                  DAL_TLMM_GPIO_ENABLE);
    
      nResult = DalTlmm_GpioIn(tlmm_dal_handle, (DALGpioSignalType)RF_CONFIG_GPIO1, &eValue);
      if((DAL_SUCCESS == nResult) && ((DAL_GPIO_LOW_VALUE == eValue)||(DAL_GPIO_HIGH_VALUE == eValue)))
      {
        
        MSG_1(MSG_SSID_DS, MSG_LEGACY_FATAL, "dbg::eValue gpio134 = %d******", (int)eValue);
        ret_status_134 = ret_status_134 + (int)eValue;
      }
      else
        return -1;
    
      nResult = DalTlmm_GpioIn(tlmm_dal_handle, (DALGpioSignalType)RF_CONFIG_GPIO2, &eValue);
      if((DAL_SUCCESS == nResult) && ((DAL_GPIO_LOW_VALUE == eValue)||(DAL_GPIO_HIGH_VALUE == eValue)))
      {
        
        MSG_1(MSG_SSID_DS, MSG_LEGACY_FATAL, "dbg::eValue gpio62 = %d******", (int)eValue);
        ret_status_62 = ret_status_62 + (int)eValue;
      }
      else
        return -1;
    
    
      ret_status = ((ret_status_134 << 1) | ret_status_62);
      MSG_1(MSG_SSID_DS, MSG_LEGACY_FATAL, "dbg::ret_status = %d", ret_status);
    
      return ret_status;
    }
    //end: stone added for gpio-in

如果要添加输出，参考如下：

//测试输出GPIO状态
      (void)DalTlmm_ConfigGpio(tlmm_dal_handle,
      						 (DALGpioSignalType)TEST_CONFIG_GPIO,
      		 			  DAL_TLMM_GPIO_ENABLE);
    
      (void)DalTlmm_GpioIdOut(tlmm_dal_handle,
                              (DALGpioSignalType)TEST_CONFIG_GPIO,
                              DAL_GPIO_HIGH_VALUE);

上述完成后，在需要检测GPIO状态的地方调用rfc\_common\_get\_gpio即可：

void caller_func(void)
    {
        
    	……
    	int gpio_value = 0;
    
    	gpio_value = rfc_common_get_gpio();
      	MSG_1(MSG_SSID_DS, MSG_LEGACY_FATAL, "dbg::gpio_value********* = %d", gpio_value);
      	……
    ｝

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