SAMA5 NAND: Basic support for access to NAND FLASH

2 files changed, 145 insertions, 1 deletions

diff --git a/nuttx/configs/sama5d3x-ek/src/Makefile b/nuttx/configs/sama5d3x-ek/src/Makefile
index 89e330495..5d69c0fd3 100644
--- a/nuttx/configs/sama5d3x-ek/src/Makefile
+++ b/nuttx/configs/sama5d3x-ek/src/Makefile
@@ -58,10 +58,14 @@ ifeq ($(CONFIG_SAMA5_DDRCS),y)
 CSRCS += sam_sdram.c
 endif
 
-ifeq ($(CONFIG_SAMA5_BOOT_CS0FLASH),y)
+ifeq ($(CONFIG_SAMA5_EBICS0_NOR),y)
 CSRCS += sam_norflash.c
 endif
 
+ifeq ($(CONFIG_SAMA5_EBICS3_NAND),y)
+CSRCS += sam_nandflash.c
+endif
+
 ifeq ($(CONFIG_SAMA5_NOR_MAIN),y)
 CSRCS += nor_main.c
 endif
diff --git a/nuttx/configs/sama5d3x-ek/src/sam_nandflash.c b/nuttx/configs/sama5d3x-ek/src/sam_nandflash.c
new file mode 100644
index 000000000..8ad48ccc5
--- /dev/null
+++ b/nuttx/configs/sama5d3x-ek/src/sam_nandflash.c
@@ -0,0 +1,140 @@
+/****************************************************************************
+ * configs/sama5d3x-ek/src/sam_norflash.c
+ *
+ *   Copyright (C) 2013 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * Most of this file derives from Atmel sample code for the SAMA5D3x-EK
+ * board.  That sample code has licensing that is compatible with the NuttX
+ * modified BSD license:
+ *
+ *   Copyright (c) 2012, Atmel Corporation
+ *   All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor Atmel nor the names of its contributors may
+ *    be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <debug.h>
+
+#include "up_arch.h"
+#include "sam_periphclks.h"
+#include "sam_nand.h"
+#include "chip/sam_hsmc.h"
+
+#include "sama5d3x-ek.h"
+
+#ifdef CONFIG_SAMA5_BOOT_CS3FLASH
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: board_nandflash_config
+ *
+ * Description:
+ *   If CONFIG_SAMA5_BOOT_CS3FLASH is defined, then NAND FLASH support is
+ *   enabled.  This function provides the board-specific implementation of
+ *   the logic to reprogram the SMC to support NAND FLASH on the specified
+ *   CS.
+ *
+ * Input Parameters:
+ *   cs - Chip select number (in the event that multiple NAND devices
+ *        are connected on-board).
+ *
+ * Returned Values:
+ *   OK if the HSMC was successfully configured for this CS.  A negated
+ *   errno value is returned on a failure.  This would fail with -ENODEV,
+ *   for example, if the board does not support NAND FLASH on the requested
+ *   CS.
+ *
+ ****************************************************************************/
+
+int board_nandflash_config(int cs)
+{
+  uint32_t regval;
+
+  /* The Embest and Ronetix CM boards and one Hynix NAND HY27UF(08/16)2G2B
+   * Series NAND (MT29F2G08ABAEAWP).  This part has a capacity of 256Mx8bit
+   * () with spare 8Mx8 bit capacity. The device contains 2048 blocks, composed
+   * by 64 x 2112 byte pages.  The effective size is approximately 256MiB.
+   *
+   * NAND is available on CS3.
+   */
+
+  if (cs == HSMC_CS3)
+    {
+      /* Make sure that the SMC peripheral is enabled. */
+
+      sam_hsmc_enableclk();
+
+      /* Configure the SMC */
+
+      regval = HSMC_SETUP_NWE_SETUP(1) |  HSMC_SETUP_NCS_WRSETUP(1) |
+               HSMC_SETUP_NRD_SETUP(2) | HSMC_SETUP_NCS_RDSETUP(1);
+      putreg32(regval, SAM_HSMC_SETUP(HSMC_CS3));
+
+      regval = HSMC_PULSE_NWE_PULSE(5) | HSMC_PULSE_NCS_WRPULSE(7) |
+               HSMC_PULSE_NRD_PULSE(5) | HSMC_PULSE_NCS_RDPULSE(7);
+      putreg32(regval, SAM_HSMC_PULSE(HSMC_CS3));
+
+      regval = HSMC_CYCLE_NWE_CYCLE(8) | HSMC_CYCLE_NRD_CYCLE(9);
+      putreg32(regval, SAM_HSMC_CYCLE(HSMC_CS3));
+
+      regval = HSMC_TIMINGS_TCLR(3) | HSMC_TIMINGS_TADL(10) |
+               HSMC_TIMINGS_TAR(3) | HSMC_TIMINGS_TRR(4) |
+               HSMC_TIMINGS_TWB(5) | HSMC_TIMINGS_RBNSEL(3) |
+               HSMC_TIMINGS_NFSEL;
+      putreg32(regval, SAM_HSMC_TIMINGS(HSMC_CS3));
+
+      regval = HSMC_MODE_READMODE | HSMC_MODE_WRITEMODE |
+               HSMC_MODE_BIT_8 | HSMC_MODE_TDFCYCLES(1);
+      putreg32(regval, SAM_HSMC_MODE(HSMC_CS3));
+
+      return OK;
+    }
+
+  return -ENODEV;
+}
+
+#endif /* CONFIG_SAMA5_BOOT_CS3FLASH */