[incubator-nuttx] 08/13: arch: cxd56xx: Add eMMC configuration for vendor-specific commands

[xiaoxiang]

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xiaoxiang pushed a commit to branch master
in repository https://gitbox.apache.org/repos/asf/incubator-nuttx.git

commit d29db87bdcc832114d8c5c6cacf00c751a9f1695
Author: SPRESENSE <41312067+sprese...@users.noreply.github.com>
AuthorDate: Sun Jul 4 12:54:12 2021 +0900

    arch: cxd56xx: Add eMMC configuration for vendor-specific commands
    
    The eMMC driver for cxd56xx has been implemented a vendor-specific command
    for Toshiba eMMC device, and so add a new configuration to enable the code.
---
 arch/arm/src/cxd56xx/Kconfig               | 10 ++++++++++
 arch/arm/src/cxd56xx/cxd56_emmc.c          |  4 ++++
 arch/arm/src/cxd56xx/hardware/cxd56_emmc.h |  3 +++
 3 files changed, 17 insertions(+)

diff --git a/arch/arm/src/cxd56xx/Kconfig b/arch/arm/src/cxd56xx/Kconfig
index 58c58cc..cbd7619 100644
--- a/arch/arm/src/cxd56xx/Kconfig
+++ b/arch/arm/src/cxd56xx/Kconfig
@@ -1234,6 +1234,16 @@ config CXD56_EMMC
        ---help---
                Emmc driver for cxd56xx chip
 
+if CXD56_EMMC
+
+config CXD56_EMMC_VENDOR_TOSHIBA
+       bool "Toshiba eMMC device"
+       default n
+       ---help---
+               Enable vendor-specific commands for Toshiba eMMC device.
+
+endif # CXD56_EMMC
+
 endmenu
 
 config CXD56_GE2D
diff --git a/arch/arm/src/cxd56xx/cxd56_emmc.c 
b/arch/arm/src/cxd56xx/cxd56_emmc.c
index b1430ab..2fd8ca1 100644
--- a/arch/arm/src/cxd56xx/cxd56_emmc.c
+++ b/arch/arm/src/cxd56xx/cxd56_emmc.c
@@ -668,11 +668,15 @@ static int emmc_hwinitialize(void)
 
   emmc_changeclock(EMMC_CLKDIV_NON_DIV);
 
+#ifdef CONFIG_CXD56_EMMC_VENDOR_TOSHIBA
+  /* Vendor-specific command */
+
   ret = emmc_switchcmd(EXTCSD_PON, EXTCSD_PON_POWERED_ON);
   if (ret)
     {
       goto errout;
     }
+#endif
 
   return OK;
 
diff --git a/arch/arm/src/cxd56xx/hardware/cxd56_emmc.h 
b/arch/arm/src/cxd56xx/hardware/cxd56_emmc.h
index b310ed3..a5e2e49 100644
--- a/arch/arm/src/cxd56xx/hardware/cxd56_emmc.h
+++ b/arch/arm/src/cxd56xx/hardware/cxd56_emmc.h
@@ -324,6 +324,9 @@
 #define EXTCSD_BUS_WIDTH            (183u)
 #define EXTCSD_BUS_WIDTH_4BIT_SDR   (0x01u)
 #define EXTCSD_BUS_WIDTH_4BIT_DDR   (0x05u)
+
+/* Vendor-specific Extended CSD */
+
 #define EXTCSD_PON                  (34u) /* Power Off Notification */
 #define EXTCSD_PON_POWERED_ON       (0x01u)
 #define EXTCSD_PON_POWERED_OFF_LONG (0x03u)