Prep for 0.4.7 releasenuttx-4.7

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@1837 42af7a65-404d-4744-a932-0658087f49c3

15 files changed, 90 insertions, 152 deletions

diff --git a/nuttx/ChangeLog b/nuttx/ChangeLog
index a21520a72..a314430d4 100644
--- a/nuttx/ChangeLog
+++ b/nuttx/ChangeLog
@@ -722,7 +722,7 @@
 	* sched/: pthread_create() must return a (non-negated) errno value on failure.
 	* configs/eagle100/nsh: Add a NuttShell (NSH) configuration for the Eagle-100
 
-0.4.7 2009-xx-xx Gregory Nutt <spudmonkey@racsa.co.cr>
+0.4.7 2009-05-29 Gregory Nutt <spudmonkey@racsa.co.cr>
 
 	* arch/arm/src/lm3s: Added an Ethernet driver for the LM3S6918
 	* configs/eagle100/nettest: Added an examples/nettest configuration for the
@@ -747,9 +747,10 @@
 	  it possible to build NuttX for the Eagle100 using CodeSourcery 2009q1 toolchain
 	  and the devkitARM GNU toolchain.
 	* configs/mcu123-lpc214x/src: Corrected some logic in the LPC2148 SPI receive block
-	  logic.  Re-verified SDC ver1.x support with 1Gb Toshiba SDC, 1Gb PNY SDC, 2Gb SanDisk SDC,
-	  and 4Gb Kingston SDHC.
+	  logic.  Re-verified SDC ver1.x support with 1Gb Toshiba SDC, 1Gb PNY SDC, and
+	  4Gb Kingston SDHC.  There are CMD0 issues with the 2Gb SanDisk SDC on this board.
 	* fs/fs_mount.c: Corrected error handling that could cause a deadlock on certain
 	  mount() failures.
 
+0.4.8 2009-xx-xx Gregory Nutt <spudmonkey@racsa.co.cr>
 
diff --git a/nuttx/Documentation/NuttX.html b/nuttx/Documentation/NuttX.html
index 4e651caa4..41f583fa5 100644
--- a/nuttx/Documentation/NuttX.html
+++ b/nuttx/Documentation/NuttX.html
@@ -401,7 +401,7 @@
   <td><br></td>
   <td>
     <p>
-      <li>Generic driver for SPI-based MMC/SD cards.</li>
+      <li>Generic driver for SPI-based MMC/SD/SDH cards.</li>
     </p>
 </tr>
 <tr>
@@ -687,8 +687,8 @@
   </tr>
 </table>
 
-<p><b>nuttx-0.4.6</b>.
-  The 38<sup>th</sup> release of NuttX (nuttx-0.4.6) is available for download
+<p><b>nuttx-0.4.7</b>.
+  The 39<sup>th</sup> release of NuttX (nuttx-0.4.7) was made on May 29, 2009 and is available for download
   from the <a href="http://sourceforge.net/project/showfiles.php?group_id=189573">SourceForge</a>
   website.
   The change log associated with the release is available <a href="#currentrelease">here</a>.
@@ -696,20 +696,22 @@
   These unreleased changes are listed <a href="#pendingchanges">here</a>.
 </p>
 <p>
-  The release features support for the <a href=" http://www.micromint.com/">Micromint</a>
-  Eagle-100 development board.
-  This board is based around, the Luminary LM3S6918 MCU.
-  This is the first ARM Cortex-M3 architecture supported by Nuttx.
-  This initial, basic port includes timer and serial console with configurations to execute the NuttX OS test and to run the <a href="NuttShell.html">NuttShell (NSH)</a>.
-  Work is still underway on this port and current plans are to have I2C, SSI, MMC/SD, and and Ethernet driver in the 0.4.7 release.
+  This release focuses on cleaning up and extending the Eagle100/LM3S6918 port released
+  in nuttx-0.4.6 and on improved MMC/SD support.  New features include:
+  <ul>
+    <li>
+      Improved reliably and additional drivers for the Eagle-100 board (LM3S6918
+      ARM Cortex-M3).  Additional drivers include Ethernet, SSI, and support for
+      the on-board LEDs and microSD cards.
+    </li>
+    <li>
+      The SPI-based MMC/SD driver was extended to support SDHC Version 2.xx cards.
+    </li>
+  </ul>
 </p>
 <p>
-  Additional work was done on the MXADS i.MX1 port, however, that work has been set aside
-  until I complete work on the Eagle-100 (I also need to come up with a 3V power supply).
-</p>
-<p>
-  Other changes in this release include: Extensions to the SPI interface definition in order to handle 9-bit interfaces to displays.
-  Several bugs were fixed (see the <a href="#currentrelease">ChangeLog</a> for a complete list of changes).
+  In addition, this release includes several important bugfixes for the LM3S6918, the LPC2148,
+  the SPI-based MMC/SD driver, and to FAT32.  See the ChangeLog for details of these bugfixes.
 </p>
 
 <table width ="100%">
@@ -866,11 +868,10 @@
     </p>
     <p>
       <b>STATUS:</b>
-        This initial, basic release of this port has been verifed and included in NuttX
-        version 0.4.6.  The basic port includes timer and serial console with configurations
-        to execute the NuttX OS test and to run the <a href="NuttShell.html">NuttShell (NSH)</a>.
-        Work is still underway on this port and current plans are to have I2C, SSI, MMC/SD, and
-        and Ethernet driver in the 0.4.7 release.
+        The initial, release of this port was included in NuttX  version 0.4.6.
+        The current port includes timer, serial console, Ethernet, SSI, and microSD support.
+        There are working configurations the NuttX OS test, to run the <a href="NuttShell.html">NuttShell
+        (NSH)</a>, the NuttX networking test, and the uIP web server.
     </p>
    </td>
 </tr>
@@ -1358,30 +1359,35 @@ Other memory:
 </table>
 
 <pre><ul>
-nuttx-0.4.6 2009-xx-xx Gregory Nutt &lt;spudmonkey@racsa.co.cr&gt;
-
-	* Change SPI interface so that is can accomodate interfaces where the
-	  number of bits per word is greater an 8 (such as with many 9-bit display
-	  interfaces). -- this might have broken a few things which will need to
-	  be retested!
-	* arch/arm/src/imx: Added i.MX SPI driver
-	* SPI: Add a method to set the number of bits per word.  Also add an
-	  alternative interface for so that (eventually) I can phase the sndblock
-	  and recvblock methods and replace them with a single exchange method
-	* Build:  objcopy fails with toolchains that use newer GCC and binutils.  The
-	  following arguments need to be included in the objcopy command line "-R .note
-	  -R .note.gnu.build-id -R .comment"  This has bin fixed in arch/arm/src/Makefile,
-	  but other architectures may have the same problem.  Thanks to Dave Marples
-	  for verifying this.
-	* configs/eagle100/ostest: Added support for the MicroMint Eagle100 board. 
-	  This board has a Luminary LM3S6918 Cortex-M3. Added a configuration to build
-	  examples/ostest.
-	* arch/arm/src/lpc214x: Add configuration option to enable fast GPIO (vs.
-	  legacy, "slow" GPIO) for LPC214x.
-	* arch/arm: Restructured the arch/arm directory structure to better suppor ARM
-	  and Cortex-M3.
-	* sched/: pthread_create() must return a (non-negated) errno value on failure.
-	* configs/eagle100/nsh: Add a NuttShell (NSH) configuration for the Eagle-100
+nuttx-0.4.7 2009-05-29 Gregory Nutt &lt;spudmonkey@racsa.co.cr&gt;
+
+	* arch/arm/src/lm3s: Added an Ethernet driver for the LM3S6918
+	* configs/eagle100/nettest: Added an examples/nettest configuration for the
+	  Micromint Eagle100 board.
+	* Documentation/NuttxPortingGuide.html: Added a section on NuttX device drivers.
+	* configs/eagle100/httpd: Added an examples/uip configuration for the
+	  Micromint Eagle100 board.
+	* arch/arm/src/lm3s: Added an SSI driver for the LM3S6918
+	* examples/nsh: Added MMC/SD support for the LM3S6918
+	* arch/arm/src/lm3s: Fix logic for setting and clearing output GPIOs (critical
+	  fix!).
+	* drivers/mmcsd: Found numerous errors in current MMC/SD SPI driver.  Bad frequency
+	  calculation based on CSD settings, inappropriate timeouts, odd code that looks like
+	  a bad search and replace.  Also needs support for SDHC ver 2.x.  New MMC/SD is
+	  largely redesigned and probably non-functional in the first check-in.
+	* drivers/mmcsd: Changes verified on 4Gb Kingston microSHDC card and on a 2Gb
+	  SanDisk microSDC card on the Eagle100 platform.
+	* fs/fat: With the 4Gb card, the first tests of FAT32 were (finally) performed.
+	  Found and corrected a problem that prevented use of FAT32: It was not updating
+	  the sector cache before checking the FAT32 FSINFO sector.
+	* configs/eagle100/*/Make.defs:  Added configuration options that should make
+	  it possible to build NuttX for the Eagle100 using CodeSourcery 2009q1 toolchain
+	  and the devkitARM GNU toolchain.
+	* configs/mcu123-lpc214x/src: Corrected some logic in the LPC2148 SPI receive block
+	  logic.  Re-verified SDC ver1.x support with 1Gb Toshiba SDC, 1Gb PNY SDC, and
+	  4Gb Kingston SDHC.  There are CMD0 issues with the 2Gb SanDisk SDC on this board.
+	* fs/fs_mount.c: Corrected error handling that could cause a deadlock on certain
+	  mount() failures.
 
 pascal-0.1.2 2008-02-10 Gregory Nutt &lt;spudmonkey@racsa.co.cr&gt;
 
@@ -1412,35 +1418,7 @@ buildroot-0.1.5 2009-04-25 &lt;spudmonkey@racsa.co.cr&gt;
 </table>
 
 <pre><ul>
-nuttx-0.4.7 2009-xx-xx Gregory Nutt &lt;spudmonkey@racsa.co.cr&gt;
-
-	* arch/arm/src/lm3s: Added an Ethernet driver for the LM3S6918
-	* configs/eagle100/nettest: Added an examples/nettest configuration for the
-	  Micromint Eagle100 board.
-	* Documentation/NuttxPortingGuide.html: Added a section on NuttX device drivers.
-	* configs/eagle100/httpd: Added an examples/uip configuration for the
-	  Micromint Eagle100 board.
-	* arch/arm/src/lm3s: Added an SSI driver for the LM3S6918
-	* examples/nsh: Added MMC/SD support for the LM3S6918
-	* arch/arm/src/lm3s: Fix logic for setting and clearing output GPIOs (critical
-	  fix!).
-	* drivers/mmcsd: Found numerous errors in current MMC/SD SPI driver.  Bad frequency
-	  calculation based on CSD settings, inappropriate timeouts, odd code that looks like
-	  a bad search and replace.  Also needs support for SDHC ver 2.x.  New MMC/SD is
-	  largely redesigned and probably non-functional in the first check-in.
-	* drivers/mmcsd: Changes verified on 4Gb Kingston microSHDC card and on a 2Gb
-	  SanDisk microSDC card on the Eagle100 platform.
-	* fs/fat: With the 4Gb card, the first tests of FAT32 were (finally) performed.
-	  Found and corrected a problem that prevented use of FAT32: It was not updating
-	  the sector cache before checking the FAT32 FSINFO sector.
-	* configs/eagle100/*/Make.defs:  Added configuration options that should make
-	  it possible to build NuttX for the Eagle100 using CodeSourcery 2009q1 toolchain
-	  and the devkitARM GNU toolchain.
-	* configs/mcu123-lpc214x/src: Corrected some logic in the LPC2148 SPI receive block
-	  logic.  Re-verified SDC ver1.x support with 1Gb Toshiba SDC, 1Gb PNY SDC, 2Gb SanDisk SDC,
-	  and 4Gb Kingston SDHC.
-	* fs/fs_mount.c: Corrected error handling that could cause a deadlock on certain
-	  mount() failures.
+nuttx-0.4.8 2009-xx-xx Gregory Nutt &lt;spudmonkey@racsa.co.cr&gt;
 
 pascal-0.1.3 2009-xx-xx Gregory Nutt &lt;spudmonkey@racsa.co.cr&gt;
 
diff --git a/nuttx/Documentation/NuttxPortingGuide.html b/nuttx/Documentation/NuttxPortingGuide.html
index 6ab70d961..b2eb55d04 100644
--- a/nuttx/Documentation/NuttxPortingGuide.html
+++ b/nuttx/Documentation/NuttxPortingGuide.html
@@ -2183,9 +2183,6 @@ extern void up_ledoff(int led);
   <li>
     <code>CONFIG_MMCSD_SPICLOCK</code>: Maximum SPI clock to drive MMC/SD card. Default is 20MHz.
   </li>
-  <li>
-    <code>CONFIG_MMCSD_SYNCHRONIZE</code>: Special synchronization logic needed
-  </li>
 </ul>
 
 <h2>Network Support</h2>
diff --git a/nuttx/ReleaseNotes b/nuttx/ReleaseNotes
index 5900c4f3b..870c7a910 100644
--- a/nuttx/ReleaseNotes
+++ b/nuttx/ReleaseNotes
@@ -884,3 +884,29 @@ in order to handle 9-bit interfaces to displays.  Several bugs were fixed (see t
 ChangeLog for a complete list of changes).
 
 This tarball contains a complete CVS snapshot from May 19, 2009.
+
+nuttx-0.4.7
+^^^^^^^^^^^
+
+This is the 39th release of NuttX.  This release focuses on cleaning up and
+extending the Eagle100/LM3S6918 port released in nuttx-0.4.6 and on improved
+MMC/SD support.  New features include:
+
+  o Improved reliably and additional drivers for the Eagle-100 board (LM3S6918
+    ARM Cortex-M3).  Additional drivers include Ethernet, SSI, and support for
+    the on-board LEDs and microSD cards.
+  o The SPI-based MMC/SD driver was extended to support SDHC Version 2.xx cards.
+
+In addition, this release includes several important bugfixes for the LM3S6918,
+the LPC2148, the SPI-based MMC/SD driver, and to FAT32.  See the ChangeLog for
+details of these bugfixes.
+
+This tarball contains a complete CVS snapshot from May 19, 2009.
+
+
+
+
+
+
+
+
diff --git a/nuttx/TODO b/nuttx/TODO
index 3e3ea0944..33d0e25be 100644
--- a/nuttx/TODO
+++ b/nuttx/TODO
@@ -22,7 +22,7 @@ NuttX TODO List (Last updated April 12, 2009)
   (1)  ARM/C5471 (arch/arm/src/c5471/)
   (3)  ARM/DM320 (arch/arm/src/dm320/)
   (2)  ARM/i.MX (arch/arm/src/imx/)
-  (3)  ARM/LPC214x (arch/arm/src/lpc214x/)
+  (8)  ARM/LPC214x (arch/arm/src/lpc214x/)
   (4)  ARM/STR71x (arch/arm/src/str71x/)
   (1)  ARM/LM3S6918 (arch/arm/src/lm3s/)
   (4)  pjrc-8052 / MCS51 (arch/pjrc-8051/)
@@ -511,6 +511,12 @@ o ARM/LPC214x (arch/arm/src/lpc214x/)
   Status:      Open
   Priority:    Medium
 
+  Desription:  I am unable to initialize a 2Gb SanDisk microSD card (in adaptor) on the
+               the mcu123 board.  The card fails to accept CMD0.  Doesn't seem like a software
+               issue, but if anyone else sees the problem, I'd like to know.
+  Status:      Open
+  Priority:    Uncertain
+
 o ARM/STR71x (arch/arm/src/str71x/)
   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
diff --git a/nuttx/configs/README.txt b/nuttx/configs/README.txt
index 5443eb75e..36c422f46 100644
--- a/nuttx/configs/README.txt
+++ b/nuttx/configs/README.txt
@@ -287,7 +287,6 @@ defconfig -- This is a configuration file similar to the Linux
 		  Read/Write
 		CONFIG_MMCSD_SPICLOCK - Maximum SPI clock to drive MMC/SD card.
 		  Default is 20MHz.
-		CONFIG_MMCSD_SYNCHRONIZE - Special synchronization logic needed
 
 	TCP/IP and UDP support via uIP
 		CONFIG_NET - Enable or disable all network features
diff --git a/nuttx/configs/eagle100/httpd/defconfig b/nuttx/configs/eagle100/httpd/defconfig
index 9c42f6583..8f410917d 100644
--- a/nuttx/configs/eagle100/httpd/defconfig
+++ b/nuttx/configs/eagle100/httpd/defconfig
@@ -359,13 +359,10 @@ CONFIG_FS_ROMFS=n
 #   Provide read-only access (default is read/write)
 # CONFIG_MMCSD_SPICLOCK - Maximum SPI clock to drive MMC/SD card.
 #   Default is 20MHz.
-# CONFIG_MMCSD_SYNCHRONIZE
-#   Special synchronization logic needed
 #
 CONFIG_MMCSD_NSLOTS=1
 CONFIG_MMCSD_READONLY=n
 CONFIG_MMCSD_SPICLOCK=12500000
-CONFIG_MMCSD_SYNCHRONIZE=n
 
 #
 # TCP/IP and UDP support via uIP
diff --git a/nuttx/configs/eagle100/nettest/defconfig b/nuttx/configs/eagle100/nettest/defconfig
index 8b501a9d1..96d82f693 100644
--- a/nuttx/configs/eagle100/nettest/defconfig
+++ b/nuttx/configs/eagle100/nettest/defconfig
@@ -359,13 +359,10 @@ CONFIG_FS_ROMFS=n
 #   Provide read-only access (default is read/write)
 # CONFIG_MMCSD_SPICLOCK - Maximum SPI clock to drive MMC/SD card.
 #   Default is 20MHz.
-# CONFIG_MMCSD_SYNCHRONIZE
-#   Special synchronization logic needed
 #
 CONFIG_MMCSD_NSLOTS=1
 CONFIG_MMCSD_READONLY=n
 CONFIG_MMCSD_SPICLOCK=12500000
-CONFIG_MMCSD_SYNCHRONIZE=n
 
 #
 # TCP/IP and UDP support via uIP
diff --git a/nuttx/configs/eagle100/nsh/defconfig b/nuttx/configs/eagle100/nsh/defconfig
index 6bd803948..cbd62632f 100644
--- a/nuttx/configs/eagle100/nsh/defconfig
+++ b/nuttx/configs/eagle100/nsh/defconfig
@@ -358,13 +358,10 @@ CONFIG_FS_ROMFS=n
 #   Provide read-only access (default is read/write)
 # CONFIG_MMCSD_SPICLOCK - Maximum SPI clock to drive MMC/SD card.
 #   Default is 20MHz.
-# CONFIG_MMCSD_SYNCHRONIZE
-#   Special synchronization logic needed
 #
 CONFIG_MMCSD_NSLOTS=1
 CONFIG_MMCSD_READONLY=n
 CONFIG_MMCSD_SPICLOCK=12500000
-CONFIG_MMCSD_SYNCHRONIZE=n
 
 #
 # TCP/IP and UDP support via uIP
diff --git a/nuttx/configs/eagle100/ostest/defconfig b/nuttx/configs/eagle100/ostest/defconfig
index 2abbbb648..066703054 100644
--- a/nuttx/configs/eagle100/ostest/defconfig
+++ b/nuttx/configs/eagle100/ostest/defconfig
@@ -358,13 +358,10 @@ CONFIG_FS_ROMFS=n
 #   Provide read-only access (default is read/write)
 # CONFIG_MMCSD_SPICLOCK - Maximum SPI clock to drive MMC/SD card.
 #   Default is 20MHz.
-# CONFIG_MMCSD_SYNCHRONIZE
-#   Special synchronization logic needed
 #
 CONFIG_MMCSD_NSLOTS=1
 CONFIG_MMCSD_READONLY=n
 CONFIG_MMCSD_SPICLOCK=12500000
-CONFIG_MMCSD_SYNCHRONIZE=n
 
 #
 # TCP/IP and UDP support via uIP
diff --git a/nuttx/configs/mcu123-lpc214x/nsh/defconfig b/nuttx/configs/mcu123-lpc214x/nsh/defconfig
index fd55a8f22..c84aad6df 100644
--- a/nuttx/configs/mcu123-lpc214x/nsh/defconfig
+++ b/nuttx/configs/mcu123-lpc214x/nsh/defconfig
@@ -309,13 +309,10 @@ CONFIG_FS_ROMFS=n
 #   Provide read-only access (default is read/write)
 # CONFIG_MMCSD_SPICLOCK - Maximum SPI clock to drive MMC/SD card.
 #   Default is 20MHz.
-# CONFIG_MMCSD_SYNCHRONIZE
-#   Special synchronization logic needed
 #
 CONFIG_MMCSD_NSLOTS=1
 CONFIG_MMCSD_READONLY=n
 #CONFIG_MMCSD_SPICLOCK=20000000
-CONFIG_MMCSD_SYNCHRONIZE=y
 
 #
 # SPI-based MMC/SD driver
diff --git a/nuttx/configs/mcu123-lpc214x/ostest/defconfig b/nuttx/configs/mcu123-lpc214x/ostest/defconfig
index 28dac142b..ad5da5d30 100644
--- a/nuttx/configs/mcu123-lpc214x/ostest/defconfig
+++ b/nuttx/configs/mcu123-lpc214x/ostest/defconfig
@@ -305,13 +305,10 @@ CONFIG_FS_ROMFS=n
 #   Provide read-only access (default is read/write)
 # CONFIG_MMCSD_SPICLOCK - Maximum SPI clock to drive MMC/SD card.
 #   Default is 20MHz.
-# CONFIG_MMCSD_SYNCHRONIZE
-#   Special synchronization logic needed
 #
 CONFIG_MMCSD_NSLOTS=1
 CONFIG_MMCSD_READONLY=n
 #CONFIG_MMCSD_SPICLOCK=20000000
-CONFIG_MMCSD_SYNCHRONIZE=y
 
 #
 # TCP/IP and UDP support via uIP
diff --git a/nuttx/configs/mcu123-lpc214x/usbserial/defconfig b/nuttx/configs/mcu123-lpc214x/usbserial/defconfig
index 445cbac4e..0d95664cb 100644
--- a/nuttx/configs/mcu123-lpc214x/usbserial/defconfig
+++ b/nuttx/configs/mcu123-lpc214x/usbserial/defconfig
@@ -310,13 +310,10 @@ CONFIG_FS_ROMFS=n
 #   Provide read-only access (default is read/write)
 # CONFIG_MMCSD_SPICLOCK - Maximum SPI clock to drive MMC/SD card.
 #   Default is 20MHz.
-# CONFIG_MMCSD_SYNCHRONIZE
-#   Special synchronization logic needed
 #
 CONFIG_MMCSD_NSLOTS=1
 CONFIG_MMCSD_READONLY=n
 #CONFIG_MMCSD_SPICLOCK=20000000
-CONFIG_MMCSD_SYNCHRONIZE=y
 
 #
 # TCP/IP and UDP support via uIP
diff --git a/nuttx/configs/mcu123-lpc214x/usbstorage/defconfig b/nuttx/configs/mcu123-lpc214x/usbstorage/defconfig
index da601a98f..3cf08afc2 100644
--- a/nuttx/configs/mcu123-lpc214x/usbstorage/defconfig
+++ b/nuttx/configs/mcu123-lpc214x/usbstorage/defconfig
@@ -310,13 +310,10 @@ CONFIG_FS_ROMFS=n
 #   Provide read-only access (default is read/write)
 # CONFIG_MMCSD_SPICLOCK - Maximum SPI clock to drive MMC/SD card.
 #   Default is 20MHz.
-# CONFIG_MMCSD_SYNCHRONIZE
-#   Special synchronization logic needed
 #
 CONFIG_MMCSD_NSLOTS=1
 CONFIG_MMCSD_READONLY=n
 #CONFIG_MMCSD_SPICLOCK=20000000
-CONFIG_MMCSD_SYNCHRONIZE=y
 
 #
 # TCP/IP and UDP support via uIP
diff --git a/nuttx/drivers/mmcsd/mmcsd_spi.c b/nuttx/drivers/mmcsd/mmcsd_spi.c
index cadf8bbd8..cd0870616 100644
--- a/nuttx/drivers/mmcsd/mmcsd_spi.c
+++ b/nuttx/drivers/mmcsd/mmcsd_spi.c
@@ -168,9 +168,6 @@ static void   mmcsd_semtake(sem_t *sem);
 
 /* Card SPI interface *******************************************************/
 
-#ifdef CONFIG_MMCSD_SYNCHRONIZE
-static inline void mmcsd_synchronize(FAR struct mmcsd_slot_s *slot);
-#endif
 static int    mmcsd_waitready(FAR struct mmcsd_slot_s *slot);
 static uint32 mmcsd_sendcmd(FAR struct mmcsd_slot_s *slot,
                 const struct mmcsd_cmdinfo_s *cmd, uint32 arg);
@@ -347,38 +344,6 @@ static void mmcsd_semtake(sem_t *sem)
 #define mmcsd_semgive(sem) sem_post(sem)
 
 /****************************************************************************
- * Name: mmcsd_synchronize
- *
- * Description:
- *   Wait until the the card is no longer busy
- *
- * Assumptions:
- *   MMC/SD card already selected
- *
- ****************************************************************************/
-
-#ifdef CONFIG_MMCSD_SYNCHRONIZE
-static inline void mmcsd_synchronize(FAR struct mmcsd_slot_s *slot)
-{
-  FAR struct spi_dev_s *spi = slot->spi;
-
-  /* De-select the MMCSD card */
-
-  SPI_SELECT(spi, SPIDEV_MMCSD, FALSE);
-
-  /* Wait a bit */
-
-  SPI_SEND(spi, 0xff);
-
-  /* Reselect the card */
-
-  SPI_SELECT(spi, SPIDEV_MMCSD, TRUE);
-}
-#else
-#  define  mmcsd_synchronize(slot) /* No synchronization needed */
-#endif
-
-/****************************************************************************
  * Name: mmcsd_waitready
  *
  * Description:
@@ -848,7 +813,6 @@ static int mmcsd_getcardinfo(FAR struct mmcsd_slot_s *slot, ubyte *buffer,
 
   /* Send the CMD9 or CMD10 */
 
-  mmcsd_synchronize(slot);
   result = mmcsd_sendcmd(slot, cmd, 0);
   if (result != MMCSD_SPIR1_OK)
     {
@@ -1141,11 +1105,10 @@ static ssize_t mmcsd_read(FAR struct inode *inode, unsigned char *buffer,
       fvdbg("nbytes=%d byte offset=%d\n", nbytes, offset);
     }
 
-  /* Select the slave and synchronize */
+  /* Select the slave */
 
   mmcsd_semtake(&slot->sem);
   SPI_SELECT(spi, SPIDEV_MMCSD, TRUE);
-  mmcsd_synchronize(slot);
 
   /* Single or multiple block read? */
 
@@ -1303,11 +1266,10 @@ static ssize_t mmcsd_write(FAR struct inode *inode, const unsigned char *buffer,
     }
   mmcsd_dumpbuffer(buffer, nbytes);
 
-  /* Select the slave and synchronize */
+  /* Select the slave */
 
   mmcsd_semtake(&slot->sem);
   SPI_SELECT(spi, SPIDEV_MMCSD, TRUE);
-  mmcsd_synchronize(slot);
 
   /* Single or multiple block transfer? */
 
@@ -1597,11 +1559,9 @@ static int mmcsd_mediainitialize(FAR struct mmcsd_slot_s *slot)
           do
             {
               fvdbg("%d. Send CMD55/ACMD41\n", elapsed);
-              mmcsd_synchronize(slot);
               result = mmcsd_sendcmd(slot, &g_cmd55, 0);
               if (result == MMCSD_SPIR1_IDLESTATE || result == MMCSD_SPIR1_OK)
                 {
-                  mmcsd_synchronize(slot);
                   result = mmcsd_sendcmd(slot, &g_acmd41, 1 << 30);
                   if (result == MMCSD_SPIR1_OK)
                     {
@@ -1644,13 +1604,11 @@ static int mmcsd_mediainitialize(FAR struct mmcsd_slot_s *slot)
       /* Both the MMC card and the SD card support CMD55 */
 
       fvdbg("Send CMD55/ACMD41\n");
-      mmcsd_synchronize(slot);
       result = mmcsd_sendcmd(slot, &g_cmd55, 0);
       if (result == MMCSD_SPIR1_IDLESTATE || result == MMCSD_SPIR1_OK)
         {
           /* But ACMD41 is supported only on SD */
 
-          mmcsd_synchronize(slot);
           result = mmcsd_sendcmd(slot, &g_acmd41, 0);
           if (result == MMCSD_SPIR1_IDLESTATE || result == MMCSD_SPIR1_OK)
             {
@@ -1668,11 +1626,9 @@ static int mmcsd_mediainitialize(FAR struct mmcsd_slot_s *slot)
           if (IS_SD(slot->type))
             {
               fvdbg("%d. Send CMD55/ACMD41\n", elapsed);
-              mmcsd_synchronize(slot);
               result = mmcsd_sendcmd(slot, &g_cmd55, 0);
               if (result == MMCSD_SPIR1_IDLESTATE || result == MMCSD_SPIR1_OK)
                 {
-                  mmcsd_synchronize(slot);
                   result = mmcsd_sendcmd(slot, &g_acmd41, 0);
                   if (result == MMCSD_SPIR1_OK)
                     {
@@ -1683,7 +1639,6 @@ static int mmcsd_mediainitialize(FAR struct mmcsd_slot_s *slot)
           else
             {
               fvdbg("%d. Send CMD1\n", i);
-              mmcsd_synchronize(slot);
               result = mmcsd_sendcmd(slot, &g_cmd1, 0);
               if (result == MMCSD_SPIR1_OK)
                 {