SAM3/4: Important bugfix. Values read from PIO input pins do not change unless clocking to the PIO block is enabled

configs/sama5d4-ek/README.txt

@@ -3330,15 +3330,21 @@ Configurations
        will need to install a battery in the battery holder (J12) and close
        the jumper, JP13.
 
-    8. Support for HSMCI0 and HSMCI1 is built-in by default. The SAMA4D4-EK
-       provides a two SD memory card slots:  (1) a full size SD card slot
-       (J10), and (2) a microSD memory card slot (J11).  The full size SD
-       card slot connects via HSMCI0; the microSD connects vi HSMCI1.
-       Support for both SD slots can be enabled with the settings provided
+    8. Support for HSMCI0 is built-in by default. The SAMA4D4-EK provides
+       two SD memory card slots:  (1) a full size SD card slot (J10), and
+       (2) a microSD memory card slot (J11).  The full size SD card slot
+       connects via HSMCI0; the microSD connects vi HSMCI1.  Support for
+       the microSD slot could also be enabled with the settings provided
        in the paragraph entitled "HSMCI Card Slots" above.
 
        NOTE:  For now I am boot off the microSD slot so, unless are booting
-       in a different manner, this HSMCI1 slot may not be useful to you.
+       in a different manner, this HSMCI1 slot may not be useful to you
+       anyway.
+
+       STATUS:  There is an unresolved issue with HSMCI0 as of this writing.
+       No errors are reported so most the handshaking signals and command
+       transfers are working, but all data transfers return the value zero
+       (with or without DMA).  This seems like some pin configuration issue.
 
     9. The SAMA5D4-EK includes for an AT25 serial DataFlash.  That support is
        NOT enabled in this configuration.  Support for that serial FLASH can
@@ -3437,7 +3443,11 @@ To-Do List
 
 2) HSCMI TX DMA support is currently commented out.
 
-3) Some drivers may require some adjustments if you intend to run from SDRAM.
+3) Currently HSMCI1 does not work correctly.  No errors are reported so all of
+   the card handshakes must be working, but only zero values are read from the
+   card (with or without DMA).  Sounds like a pin configuration issue.
+
+4) Some drivers may require some adjustments if you intend to run from SDRAM.
    That is because in this case macros like BOARD_MCK_FREQUENCY are not constants
    but are instead function calls:  The MCK clock frequency is not known in
    advance but instead has to be calculated from the bootloader PLL configuration.

configs/sama5d4-ek/nsh/defconfig

@@ -119,6 +119,8 @@ CONFIG_ARMV7A_TOOLCHAIN_CODESOURCERYW=y
 # CONFIG_ARMV7A_TOOLCHAIN_GNU_EABIW is not set
 # CONFIG_ARMV7A_TOOLCHAIN_GNU_OABI is not set
 # CONFIG_ARMV7A_DECODEFIQ is not set
+CONFIG_SDIO_DMA=y
+# CONFIG_SDIO_WIDTH_D1_ONLY is not set
 
 #
 # SAMA5 Configuration Options
@@ -187,7 +189,7 @@ CONFIG_SAMA5_USART4=y
 # CONFIG_SAMA5_TWI1 is not set
 # CONFIG_SAMA5_TWI2 is not set
 # CONFIG_SAMA5_TWI3 is not set
-# CONFIG_SAMA5_HSMCI0 is not set
+CONFIG_SAMA5_HSMCI0=y
 # CONFIG_SAMA5_HSMCI1 is not set
 # CONFIG_SAMA5_SBM is not set
 # CONFIG_SAMA5_SFC is not set
@@ -200,7 +202,7 @@ CONFIG_SAMA5_USART4=y
 # CONFIG_SAMA5_PWM is not set
 # CONFIG_SAMA5_ADC is not set
 # CONFIG_SAMA5_XDMAC0 is not set
-# CONFIG_SAMA5_XDMAC1 is not set
+CONFIG_SAMA5_XDMAC1=y
 # CONFIG_SAMA5_UHPHS is not set
 # CONFIG_SAMA5_UDPHS is not set
 # CONFIG_SAMA5_EMACB is not set
@@ -214,7 +216,19 @@ CONFIG_SAMA5_TRNG=y
 # CONFIG_SAMA5_FUSE is not set
 # CONFIG_SAMA5_MPDDRC is not set
 # CONFIG_SAMA5_VDEC is not set
-# CONFIG_SAMA5_PIO_IRQ is not set
+CONFIG_SAMA5_PIO_IRQ=y
+# CONFIG_SAMA5_PIOA_IRQ is not set
+# CONFIG_SAMA5_PIOB_IRQ is not set
+# CONFIG_SAMA5_PIOC_IRQ is not set
+# CONFIG_SAMA5_PIOD_IRQ is not set
+CONFIG_SAMA5_PIOE_IRQ=y
+
+#
+# HSMCI device driver options
+#
+CONFIG_SAMA5_HSMCI0_XDMAC1=y
+# CONFIG_SAMA5_HSMCI_RDPROOF is not set
+# CONFIG_SAMA5_HSMCI_WRPROOF is not set
 
 #
 # External Memory Configuration
@@ -238,7 +252,7 @@ CONFIG_SAMA5_ISRAM_HEAP=y
 #
 # CONFIG_ARCH_NOINTC is not set
 # CONFIG_ARCH_VECNOTIRQ is not set
-# CONFIG_ARCH_DMA is not set
+CONFIG_ARCH_DMA=y
 CONFIG_ARCH_HAVE_IRQPRIO=y
 # CONFIG_CUSTOM_STACK is not set
 # CONFIG_ADDRENV is not set
@@ -300,6 +314,7 @@ CONFIG_ARCH_HAVE_BUTTONS=y
 # CONFIG_ARCH_BUTTONS is not set
 CONFIG_ARCH_HAVE_IRQBUTTONS=y
 CONFIG_NSH_MMCSDMINOR=0
+CONFIG_NSH_MMCSDSLOTNO=0
 
 #
 # Board-Specific Options
@@ -381,6 +396,7 @@ CONFIG_SIG_SIGUSR1=1
 CONFIG_SIG_SIGUSR2=2
 CONFIG_SIG_SIGALARM=3
 CONFIG_SIG_SIGCONDTIMEDOUT=16
+CONFIG_SIG_SIGWORK=17
 
 #
 # POSIX Message Queue Options
@@ -424,7 +440,17 @@ CONFIG_RTC_DATETIME=y
 # CONFIG_BCH is not set
 # CONFIG_INPUT is not set
 # CONFIG_LCD is not set
-# CONFIG_MMCSD is not set
+CONFIG_MMCSD=y
+CONFIG_MMCSD_NSLOTS=1
+# CONFIG_MMCSD_READONLY is not set
+# CONFIG_MMCSD_MULTIBLOCK_DISABLE is not set
+# CONFIG_MMCSD_MMCSUPPORT is not set
+CONFIG_MMCSD_HAVECARDDETECT=y
+CONFIG_ARCH_HAVE_SDIO=y
+CONFIG_MMCSD_SDIO=y
+# CONFIG_SDIO_PREFLIGHT is not set
+# CONFIG_SDIO_MUXBUS is not set
+CONFIG_SDIO_BLOCKSETUP=y
 # CONFIG_MTD is not set
 # CONFIG_PIPES is not set
 # CONFIG_PM is not set
@@ -602,7 +628,12 @@ CONFIG_LIB_SENDFILE_BUFSIZE=512
 #
 # Non-standard Library Support
 #
-# CONFIG_SCHED_WORKQUEUE is not set
+CONFIG_SCHED_WORKQUEUE=y
+CONFIG_SCHED_HPWORK=y
+CONFIG_SCHED_WORKPRIORITY=192
+CONFIG_SCHED_WORKPERIOD=50000
+CONFIG_SCHED_WORKSTACKSIZE=2048
+# CONFIG_SCHED_LPWORK is not set
 # CONFIG_LIB_KBDCODEC is not set
 # CONFIG_LIB_SLCDCODEC is not set
 
@@ -807,7 +838,7 @@ CONFIG_NSH_CONSOLE=y
 # USB Trace Support
 #
 # CONFIG_NSH_ALTCONDEV is not set
-# CONFIG_NSH_ARCHINIT is not set
+CONFIG_NSH_ARCHINIT=y
 
 #
 # NxWidgets/NxWM