[radio] move required radio caps from radio spinel into posix platform (#10502)

This commit moves the definition of the 'RequiredRadioCaps' from
`RadioSpinel` to posix `Radio` class. Because this definition depends
on `OPENTHREAD_CONFIG_THREAD_VERSION`. And we want to remove lib's
dependency on OT core. And lib as a tool should be able to decide what
caps to check at runtime.

src/lib/spinel/radio_spinel.cpp

@@ -115,7 +115,10 @@ RadioSpinel::RadioSpinel(void)
     memset(&mCallbacks, 0, sizeof(mCallbacks));
 }
 
-void RadioSpinel::Init(bool aSkipRcpCompatibilityCheck, bool aSoftwareReset, SpinelDriver *aSpinelDriver)
+void RadioSpinel::Init(bool          aSkipRcpCompatibilityCheck,
+                       bool          aSoftwareReset,
+                       SpinelDriver *aSpinelDriver,
+                       otRadioCaps   aRequiredRadioCaps)
 {
     otError error = OT_ERROR_NONE;
     bool    supportsRcpApiVersion;
@@ -147,7 +150,7 @@ void RadioSpinel::Init(bool aSkipRcpCompatibilityCheck, bool aSoftwareReset, Spi
     if (!aSkipRcpCompatibilityCheck)
     {
         SuccessOrDie(CheckRcpApiVersion(supportsRcpApiVersion, supportsRcpMinHostApiVersion));
-        SuccessOrDie(CheckRadioCapabilities());
+        SuccessOrDie(CheckRadioCapabilities(aRequiredRadioCaps));
     }
 
     mRxRadioFrame.mPsdu  = mRxPsdu;
@@ -215,23 +218,17 @@ void RadioSpinel::InitializeCaps(bool &aSupportsRcpApiVersion, bool &aSupportsRc
     sSupportsLogCrashDump         = GetSpinelDriver().CoprocessorHasCap(SPINEL_CAP_RCP_LOG_CRASH_DUMP);
 }
 
-otError RadioSpinel::CheckRadioCapabilities(void)
+otError RadioSpinel::CheckRadioCapabilities(otRadioCaps aRequiredRadioCaps)
 {
-    const otRadioCaps kRequiredRadioCaps =
-#if OPENTHREAD_CONFIG_THREAD_VERSION >= OT_THREAD_VERSION_1_2
-        OT_RADIO_CAPS_TRANSMIT_SEC | OT_RADIO_CAPS_TRANSMIT_TIMING |
-#endif
-        OT_RADIO_CAPS_ACK_TIMEOUT | OT_RADIO_CAPS_TRANSMIT_RETRIES | OT_RADIO_CAPS_CSMA_BACKOFF;
-
     otError      error = OT_ERROR_NONE;
     unsigned int radioCaps;
 
     EXPECT_NO_ERROR(error = Get(SPINEL_PROP_RADIO_CAPS, SPINEL_DATATYPE_UINT_PACKED_S, &radioCaps));
     sRadioCaps = static_cast<otRadioCaps>(radioCaps);
 
-    if ((sRadioCaps & kRequiredRadioCaps) != kRequiredRadioCaps)
+    if ((sRadioCaps & aRequiredRadioCaps) != aRequiredRadioCaps)
     {
-        otRadioCaps missingCaps = (sRadioCaps & kRequiredRadioCaps) ^ kRequiredRadioCaps;
+        otRadioCaps missingCaps = (sRadioCaps & aRequiredRadioCaps) ^ aRequiredRadioCaps;
 
         // missingCaps may be an unused variable when LogCrit is blank
         // avoid compiler warning in that case
@@ -1796,7 +1793,7 @@ void RadioSpinel::PlatDiagOutput(const char *aFormat, ...)
     va_end(args);
 }
 
-#endif
+#endif // OPENTHREAD_CONFIG_DIAG_ENABLE
 
 uint32_t RadioSpinel::GetRadioChannelMask(bool aPreferred)
 {

src/lib/spinel/radio_spinel.hpp

@@ -163,9 +163,14 @@ public:
      * @param[in]  aSoftwareReset              When doing RCP recovery, TRUE to try software reset first, FALSE to
      *                                         directly do a hardware reset.
      * @param[in]  aSpinelDriver               A pointer to the spinel driver instance that this object depends on.
+     * @param[in]  aRequiredRadioCaps          The required radio capabilities. RadioSpinel will check if RCP has
+     *                                         the required capabilities during initiailization.
      *
      */
-    void Init(bool aSkipRcpCompatibilityCheck, bool aSoftwareReset, SpinelDriver *aSpinelDriver);
+    void Init(bool          aSkipRcpCompatibilityCheck,
+              bool          aSoftwareReset,
+              SpinelDriver *aSpinelDriver,
+              otRadioCaps   aRequiredRadioCaps);
 
     /**
      * This method sets the notification callbacks.
@@ -1115,7 +1120,7 @@ private:
     SpinelDriver &GetSpinelDriver(void) const;
 
     otError CheckSpinelVersion(void);
-    otError CheckRadioCapabilities(void);
+    otError CheckRadioCapabilities(otRadioCaps aRequiredRadioCaps);
     otError CheckRcpApiVersion(bool aSupportsRcpApiVersion, bool aSupportsRcpMinHostApiVersion);
     void    InitializeCaps(bool &aSupportsRcpApiVersion, bool &aSupportsRcpMinHostApiVersion);
 

src/posix/platform/radio.cpp

@@ -93,7 +93,7 @@ void Radio::Init(const char *aUrl)
     skipCompatibilityCheck = mRadioUrl.HasParam("skip-rcp-compatibility-check");
 
     mRadioSpinel.SetCallbacks(callbacks);
-    mRadioSpinel.Init(skipCompatibilityCheck, resetRadio, &GetSpinelDriver());
+    mRadioSpinel.Init(skipCompatibilityCheck, resetRadio, &GetSpinelDriver(), kRequiredRadioCaps);
 
     ProcessRadioUrl(mRadioUrl);
 }

src/posix/platform/radio.hpp

@@ -115,6 +115,12 @@ private:
 #error "No Spinel interface is specified!"
 #endif
 
+    static constexpr otRadioCaps kRequiredRadioCaps =
+#if OPENTHREAD_CONFIG_THREAD_VERSION >= OT_THREAD_VERSION_1_2
+        OT_RADIO_CAPS_TRANSMIT_SEC | OT_RADIO_CAPS_TRANSMIT_TIMING |
+#endif
+        OT_RADIO_CAPS_ACK_TIMEOUT | OT_RADIO_CAPS_TRANSMIT_RETRIES | OT_RADIO_CAPS_CSMA_BACKOFF;
+
     RadioUrl mRadioUrl;
 #if OPENTHREAD_SPINEL_CONFIG_VENDOR_HOOK_ENABLE
     Spinel::VendorRadioSpinel mRadioSpinel;